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marino5856

Why aren't lakes salty like the ocean? - 0 views

  • The ocean is salty for several reasons, one of which is the groundwater from rain which trickles down into the ocean and picks up salt from the earth along its way! But this same water trickles down into lakes… so why aren't lakes salty?
  • The reason lake water usually isn't salty (or at least it's less salty than ocean water) is because the salty groundwater not only runs into the lakes, but also back out of it! Unlike the huge, vast ocean which already covers most of the Earth and therefore can't open up to any larger body of water, most lakes have outlets from which water leaves. This means that the salty groundwater has a chance to filter out and escape! (In the ocean, it has nowhere e
  • lse to go!)
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    • marino5856
       
      one of the reasons why lakes are not salty is because the salty groundwater it not usually runs in rivers and lake, if not also comes back out of it. But the  Vast ocean already cover most of the earth materials. Most lakes have outlet which water leaves. The salty water can get out of the oceans 
Regina Cantu

Why Do People Get Bullied - 0 views

  • One of the most common reasons for bullying is image. Anyone who looks the least bit different from what is considered to be normal will likely face bullying at some point in his life. Kids with freckles, acne, moles, buck teeth and other physical differences will be targeted by bullies.
  • Kids who go out of their way to sit in the front of the class, answer the teacher’s questions and do well on exams are also convenient targets because they are considered to be “nerds”.
  • Kids who don’t have the same style of clothing as their peers are often the targets of bullies.
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  • Students from families that can’t afford to buy the latest fashions (or even high quality clothes) might endure bullying.
  • Those are are picked on for their lack of trendy clothing will often come home in tears and ask mom and dad, “Why do people get bullied?”.
  • This is a big reason why many parents choose to enroll their kids in private schools that have a strictly enforced dress code.
  • The private school’s required uniform makes life much easier for students from families without the economic means to purchase the latest fashions.
  • . It is usually the kids from wealthier families and neighborhoods that gang up on the kids from poor backgrounds.
  • Kids from wealthy families sometimes look down upon those from lesser means. The media socializes young people to act this way. Having money and possessions is considered to be “cool”.
  • Bullies pick on kids with disabilities because they are considered to be weak and inferior.
  • This is one of the more brutal forms of bullying because children with disabilities are often completely defenseless against aggressors.
  • Even kids with learning disabilities are targeted by bullies for being different.
  • If their fellow students see them getting extra time to complete exams or getting more attention from the teacher, they’ll be viewed as different and be targeted.
  • “four eyes”
  • “geeks”.
guzman5862

The Healing Properties of Tears: 7 Good Reasons to Cry Your Eyes Out - Beyond Blue - 0 views

  • 1. Tears help us see. Starting with the most basic function of tears, they enable us to see. Literally. Tears not only lubricate our eyeballs and eyelids, they also prevent dehydration of our various mucous membranes. No lubrication, no eyesight. Writes Bergman: “Without tears, life would be drastically different for humans–in the short run enormously uncomfortable, and in the long run eyesight would be blocked out altogether.”
  • 2. Tears kill bacteria. No need for Clorox wipes. We’ve got tears! Our own antibacterial and antiviral agent working for us, fighting off all the germs we pick up on community computers, shopping carts, public sinks, and all those places the nasty little guys make their homes and procreate. Tears contain lysozyme, a fluid that the germ-a-phobic dreams about in her sleep, because it can kill 90 to 95 percent of all bacteria in just five to 10 minutes! Which translates, I’m guessing, to three months’ worth of colds and stomach viruses.
  • 3. Tears remove toxins. Biochemist William Frey, who has been researching tears for as long as I’ve been searching for sanity, found in one
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  • study that emotional tears–those formed in distress or grief–contained more toxic byproducts than tears of irritation (think onion peeling). Are tears toxic then? No! They actually remove toxins from our body that build up courtesy of stress. They are like a natural therapy or massage session, but they cost a lot less!
  • 4. Crying can elevate mood. Do you know what your manganese level is? No, neither do I. But chances are that you will feel better if it’s lower because overexposure to manganese can cause bad stuff: anxiety, nervousness, irritability, fatigue, aggression, emotional disturbance and the rest of the feelings that live inside my happy head rent-free. The act of crying can lower a person’s manganese level. And just like with the toxins I mentioned in my last point, emotional tears contain 24 percent higher albumin protein concentration–responsible for transporting many small molecules (which has to be a good thing, right?)–than irritation tears.
  • 5. Crying lowers stress. Tears really are like perspiration in that exercising and crying both relieve stress. For real. In his article, Bergman explains that tears remove some of the chemicals built up in the body from stress, like the endorphin leucine-enkaphalin and prolactin, the hormone I overproduce because of my pituitary tumor that affects my mood and stress tolerance. The opposite is true too. Bergman writes, “Suppressing tears increases stress levels, and contributes to diseases aggravated by stress, such as high blood pressure, heart problems, and peptic ulcers.
  • 6. Tears build community. In her “Science Digest” article, writer Ashley Montagu argued that crying not only contributes to good health, but it also builds community. I know what you’re thinking: “Well, yeah, but not the right kind of community. I mean, I might ask the woman bawling her eyes out behind me in church what’s wrong or if I can help her, but I’m certainly not going to invite her to dinner.” I beg to differ. As a prolific crier, especially on video, I always come away astounded by the comments … the resounding support of people I know all that well, and the level of intimacy exchanged among them. Read for yourselves some of the comments on both my self-esteem video and my recent death and dying video and you’ll appreciate my point. Tears help communication and foster community.
  • 7. Tears release feelings. Even if you haven’t just been through something traumatic or are severely depressed, the average Jo goes through his day accumulating conflicts and resentments. Sometimes they gather inside the limbic system of the brain and in certain corners of the heart. Crying is cathartic. It lets the devils out. Before they wreak all kind of havoc with the nervous and cardiovascular systems. Writes John Bradshaw in his bestseller “Home Coming”: “All these feelings need to be felt. We need to stomp and storm; to sob and cry; to perspire and tremble.” Amen, Brother Bradford!
deleon6878

5 Reasons Kids Need Homework and 5 Reasons They Don't - 0 views

  • They can discuss their assignments or any problems that they are having with parts of their textbooks, before or after classes.
    • deleon6878
       
      Homework can help because if you don't understand something you can ask the teacher and she may help you with home work you don't understand.
  • it will also allow parents to get more involved in their child's educational life.
    • deleon6878
       
      Homework can get families closer because the students ask for help and their parents or brothers/sisters can help them 
  • Thirdly, doing homework will prepare students for the big end tests. If a child does poorly on an assignment then they will learn what is necessary to do well on the next test without being punished. It also provides students with the opportunity to practice at what it takes to be successful in school. Like they say, practice makes perfect.
    • deleon6878
       
      Doing homework will get kids ready for their final test and if they do bad they can study harder and get better grades in the next test 
guzman5862

Automobile safety - Wikipedia, the free encyclopedia - 0 views

  • Automobile safety is the study and practice of design, construction, equipment and regulation to minimize the occurrence and consequences of automobile accidents. Road traffic safety more broadly includes roadway design. One of the first formal academic studies into improving vehicle safety was by Cornell Aeronautical Labs of Buffalo, New York. The main conclusion of their extensive report is the crucial importance of seat belts and padded dashboards.[1] However, the primary vector of traffic-related deaths and injuries is the disproportionate mass and velocity of an automobile compared to that of the predominant victim, the pedestrian.[citation needed] In the United States a pedestrian is injured by an automobile every 8 minutes, and are 1.5 times more likely than a vehicle's occupants to be killed in an automobile crash per outing.[2]
    • guzman5862
       
      In the cars you need to be safe and they are made like that for a reason so that you are safe and for the system inside the car is safe. A lot of persons have been dead for the cause of trafic because they get too much desperate that they try to go fast but they crash, thats why they had decided to make sit belts. The system inside the car is really little and thats why the car has a lot of things around it and the car is made like that for a reason like an oval so that they crash them with the car is suposed to not happen anything. 
lobo5879

What Sleep Is and Why All Kids Need It - 0 views

  • The average kid has a busy day. There's school, taking care of your pets, running around with friends, going to sports practice or other activities, and doing your homework. By the end of the day, your body needs a break. Sleep allows your body to rest for the next day. Everything that's alive needs sleep to survive. Even your dog or cat curls up for naps. Animals sleep for the same reason you do — to give your body a tiny vacation.
    • lobo5879
       
      people need to sleep because it is like youre brain rest also like when your body is tiered you sit down to relax sleeping is like that for your brain and your body
Eugenio Ferrara

Why does the sky change color at sunset? - 0 views

  • The sky is blue all day because the particles in our atmosphere cause light’s energies to scatter! Th
  • The reason we have color is because we have light! Beams of light contain different energies that our eyes then interpret as certain colors. When the sun shines onto Earth and lights up the sky, it shines waves of energies containing lots of colors
guzman5860

Why Is The Sky Blue? - Geography For Kids - By KidsGeo.com - 1 views

  • As the light from our Sun shines into the atmosphere, most of the colors are able to reach the Earth’s surface uninterrupted. However, because blue light has a wavelength that is the same size as the particulates in the air, this light is scattered in every direction. This blue light bounces from particulate to particulate until it eventually reaches your eyes. For this reason, no matter what direction you look in the sky, it appears to be blue. This blue light originated with the Sun, was bounced around in the sky many times, and then eventually reached your eyes.
    • guzman5860
       
      The blu light bounces from particulate to particulate until it reaches your eye and it wont  matter on what part of the sky you look at it is going to appear blue. 
    • guzman5860
       
      The blue light of the sky bounces from one particulate to another many times and if you see up to the sky it is going to appear blue.
morales5853

Animals & Habitats - 0 views

  • Some animals eat plants or other animals for food and may also use plants for shelter and nesting.
  • A habitats is a place where living things live and how they survive in that area.
  • A habitats is a place where living things live and how they survive in that area.
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  • A habitats is a place where living things live and how they survive in that area.
  • A habitats is a place where living things live and how they survive in that area.
  • A habitats is a place where living things live and how they survive in that area.
    • morales5853
       
      Animals only live in the habitat they know they will survive in
  • Plants, animals, and even humans choose habitats for many different reasons, depending on their needs.
    • morales5853
       
      Living creatures and thing decide where to live in, all depending on what they think their needs would be. For example a human would like to be were there are jobs and markets where he can survive not in the middle of the desert where they can starve and die. 
marino5856

Clocks - How Time Works - 1 views

  • A day consists of two 12-hour periods, for a total of 24 hours. An hour consists of 60 minutes. A minute consists of 60 seconds. Seconds are subdivided on a decimal system into things like "hundredths of a second" or "millionths of a second."
    • marino5856
       
      There is 24 hours in a day because  they first divided 60 and that equals 12. So 12 plus 12 equals 24 so thats how they had 24 hours in a day.
  • hat's a pretty bizarre way to divide a day up. We divide it in half, then divide the halves by twelfths, then divide the twelfths into sixtieths, then divide by 60 again, and then convert to a decimal system for the smallest increments. It's no wonder children have trouble learning how to tell time.
  • How long is a day? It's the amount of time it takes for the Earth to rotate one time on its axis. But how long does it take the Earth to rotate? That is where things become completely arbitrary. The world has decided to standardize on the following increments:
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  • Why are there 24 hours in a day? No one really knows. However, the tradition goes back a long way. Take, for example, this quote from Encyclopedia Britannica:
  • Why are there 60 minutes in an hour and 60 seconds in a minute? Again, it is unclear. It is known, however, that Egyptians once used a calendar that had 12 30-day months, giving them 360 days. This is believed to be the reason why we now divide circles into 360 degrees. Dividing 360 by 6 gives you 60, and 60 is also a base number in the Babylonian math system.
    • marino5856
       
      The Egyptians had a calendar that has 12 months so that equals 360 day in total. Also science they new that there is 360 days in a year thats why a circle is 360 degrees. The Roman people invented that so that in the clock there is not 24 hours in a clock so there is 12 am and 12pm.
  • What do a.m. and p.m. mean? These abbreviations stand for ante meridiem, before midday, and post meridiem, after midday, and they are a Roman invention. According to Daniel Boorstin in his book The Discoverers, this simple division of the day into two parts was the Romans' first increment of time within a day:
touche5839

What is Bullying? - 0 views

  • Bullying is repeated verbal, physical, social or psychological aggressive behaviour by a person or group directed towards a less powerful person or group that is intended to cause harm, distress or fear.
  • verbal or written abuse - such as targeted name-calling or jokes, or displaying offensive posters violence - including threats of violence
  • sexual harassment - unwelcome or unreciprocated conduct of a sexual nature, which could reasonably be expected to cause offence, humiliation or intimidation homophobia and other hostile behaviour towards students relating to gender and sexuality discrimination including racial discrimination - treating people differently because of their identity cyberbullying - either online or via mobile phone.
Esteban Cantu

JUPITER's Great Red Spot - EnchantedLearning.com - 0 views

  • Jupiter's Great Red Spot was discovered in 1664 by Robert Hooke. Part of the reason it lasts so long in comparison with Earth storms (other than the huge difference in scale and the existence of an internal heat source on Jupiter) is that this storm never goes over land; on Earth, hurricanes loses most of their energy and die when they stray over land.
    • Esteban Cantu
       
      In 1664, the great red spot was discovered by Robert Hooke. This storm is like a hurricane. White spots on Jupiter are also storms.
touche5839

How Birds Fly: An In-Depth Journey North Lesson - 0 views

  • A bird's center of gravity is the balance point between its two wings and between its head and tail. I
  • To fly well, birds must have most of their weight in their center of gravity, and very little weight in front of or behind it.
  • un into the wind, and the rush of air beneath their wings lifts them up. Others, like puffins and Peregrine Falcons, jump off cliffs and other high perches. Chimney Swifts simply let go of their chimney or other vertical perch, and fall into the air. Hummingbird wingbeats are so powerful that they can go straight up from a perched position without jumping. Songbirds, cranes, and many other species leap up on strong legs while flapping their wings, and there they go.
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  • The reason birds can is because of the special shape of their wings. The bones of bird wing are in front, covered with a smooth layer of feathers that taper toward the back.
garza6544

How are rainbows made? - 0 views

  • The birth of each rainbow begins with millions of tiny rain droplets.  The rain droplets serve as a type of reflector of light.  White light enters one individual rain droplet and exits as one specific color of the spectrum.  Without millions of rain droplets, a rainbow would not occur.  If you only had a few rain droplets you would only see a few colors.  This is typically why rainbow appear after a rain storm
  • Each rain droplet has a function in the formation of the rainbow. Sunlight enters the rain droplet at a specific angle and the rain droplet separates the white light into many different colors.  This angle is a fixed measurement between your eye
  • and the sun.  What color is refracted depends upon the critical angle,                   which is the angle the sunlight strikes the back of the rain droplet.  Red light bends the least, exiting the rain droplet at a 42 degree angle, while Violet light bends the most, exiting the rain droplet at a 40 degree angle.  All of the other colors of the rainbow exit the rain droplets at some angle between 40 and 42 degrees, thus making up the colors of the rainbow ROYGBIV, this order never changes.
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  • Each rain droplet reflects all colors at a given point and time, but only one color comes back to your eye, requiring million of rain droplets to create a rainbow.  As the rain droplets fall through the sky, the colors of the spectrum being reflected and refracted are constantly changing.
  • The perfect time and place to look for a rainbow you need bright sunlight to your back and rain clouds off in the distance in the direction of your shadow. If it is later than 4:30 in the afternoon or earlier than 8:30 in the morning at these condition there is a very good chance you will be able to see a rainbow in the sky.  Other places you may see rainbows formed are fountains, in the ocean as the waves crash against the rock which create a mist in the air, waterfalls, sprinklers and mist from a garden hose. Always remember to have the sun at your back to see a rainbow, happy rainbow hunting!!!!!!
  • Rainbows form a complete circle, however only half is visible.  The horizon only  Picture from the web site of the Department of Physics and Astronomy, Arizona State University                                                             allows us to see half of the rainbow circle, so we see just an arc.  What causes the rainbow to have a circular formation is the way that rain droplets fall.  The rain droplets do not fall is flat sheet, however they tend to fall at various distances and speeds.  On some occasions you can see a full circle around a garden hose.
    • garza6544
       
      each rainbow is made by millions of rain droplets. the rain droplets make a reflect of light and it makes different colors. While light comes in a specific Droplet then it makes a specific color. Without milions and milions of rain droplets the rainbow cant be formed. If you only have a few rain droplets then you will only see a few colors. This is the reason why they happen after a rain storm.
  • function
    • garza6544
       
      Each rain droplet that rains  is always useful to make a rainbow because every rainbow needs to do something different to make a rainbow. The rain droplets separates the light into different colors.
jaime5789

BBC Nature - Dinosaurs 'shrank' regularly to become birds - 0 views

shared by jaime5789 on 04 Nov 14 - No Cached
  • Huge meat-eating, land-living dinosaurs evolved into birds by constantly shrinking for over 50 million years, scientists have revealed.
    • jaime5789
       
      Gigantic dinosaurs evolved into the small birds we know today! Scientists think that dinosaurs evolved into birds, now people also think that dinosaurs used to have feathers! Big meat eating dinosaurs such as the Spinosaurus and T-Rex may have evolved into the modern birds we know today! 
    • jaime5789
       
      Gigantic dinosaurs evolved into the small birds that we see today! Scientists think that dinosaurs evolved into birds, now people also think that dinosaurs used to have feathers! Big meat eating dinosaurs such as the Spinosaurus and T-Rex may have evolved into the modern birds we know today! 
    • jaime5789
       
      Gigantic dinosaurs such as the Spinosaurus and T-Rex evolved into the small birds that we see today. Scientists think that dinosaurs evolved into birds, now people also think that dinosaurs used to have feathers! 
    • jaime5789
       
      New Paraphrase: Did you know that dinosaurs, such as the Tyrannosaurus Rex and the fearsome Velociraptor became smaller, and after 50 million years, we now think that... 
  • Previous work has shown that theropod dinosaurs, the dinosaur group which included Tyrannosaurus rex and Velociraptor and gave rise to modern birds, must have decreased in size at some point in their evolution into small, agile flyers.
    • jaime5789
       
      Now, work has shown that two legged dinosaurs including T-Rex and the fearsome Velociraptor gave birth to the birds we see today!
    • jaime5789
       
      The University of Adelaide, wonders a lot about dinosaurs... They found out that dinosaurs such as Spinosaurus and Utahraptor made the birds we know today! 
  • But size changes frequently occurred in dinosaur evolution, so the research team members, led by Mike Lee, from the University of Adelaide, Australia, wanted to find out if the dramatic size reduction associated with the origin of birds was unique. They also wanted to measure the rate of evolution in dinosaurs using a large data set
    • jaime5789
       
      Research indicates that dinosaurs constantly changed, the University of Adelaide wants to find out what makes the gigantic size changes? They found out that the evolution by dinosaur is unique and amazing! 
    • jaime5789
       
      The University of Adelaide also wants to measure the the frequency of dinosaur evolution!
    • jaime5789
       
      The U.O.A (University Of Adelaide) wonders, "how can something so big turn into something so small?" this is due to new eras, and the evolution of dinosaurs & birds!
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  • They found that the dinosaur group directly related to birds shrank rapidly from about 200 million years ago.
    • jaime5789
       
      Scientists found out that a dinosaur species related to birds shrank in a short time and probably turned into the birds we know today! 
    • jaime5789
       
      Dinosaur species related to birds, shrank in a short period of time! We know believe that they turned into the birds that we're familiar with today! 
  • Theropods shrunk 12 times from 163kg (25st 9lb) to 0.8kg (1.8lb), before becoming modern birds.
    • jaime5789
       
      Really big dinosaurs started shrinking and their weight decreased slowly..
  • The researchers found theropods were the only dinosaurs to get continuously smaller.
    • jaime5789
       
      Scientists now know that the two-legged dinosaur species were the dinosaurs that frequently got smaller! 
  • From this analysis they produced a detailed family tree mapping out the transformation of theropods to their bird descendants.
    • jaime5789
       
      We now predit that the two-legged dinosaurs transformed into birds!
  • It traces evolving adaptations and changing body size over time and across dinosaur branches.
    • jaime5789
       
      We now think that dinosaurs adapted into transforming into birds little by little! 
  • The researchers concluded that the evolution of the branch of dinosaurs leading to birds was more innovative than other dinosaur lineages.
    • jaime5789
       
      We conclude that, dinosaurs probably changed into birds! 
  • this sustained shrinking and accelerated evolution of smaller and smaller body size allowed the ancestors of birds to develop traits which helped them to cope much better than their less evolved dinosaur relatives.
    • jaime5789
       
      Dinosaurs were getting smaller they developed traits to survive. 
  • The researchers believe that miniaturisation and the development of bird-like traits had a joint influence on the evolution of the dinosaurs into today's birds. Professor Michael Benton, from the University of Bristol's school of earth sciences, said: "This study means we can't see the origin of birds as a sudden or dramatic event, with a dinosaur becoming a powered flyer overnight. "The functions of each special feature of birds changed over time - feathers first for insulation, and later co-opted for flight; early reductions in body size perhaps for other reasons, and later they were small enough for powered flight; improvements in sense of sight and enlargement of brain - even a small improvement in these is advantageous. "So perhaps it's a long-term trend associated with deputation to a new set of habitats, in the trees, to avoid predation, and to exploit new food resources."
    • jaime5789
       
      Researchers now think that the shrinking of the dinosaurs was what developed dinosaurs into todays birds! Professor Michael from the University of Bristol says that we can't study the era of birds, just like that...
    • jaime5789
       
      This is a long process that didn't just happen like that, you sleep, you wake up and you're a bird, no! Its a very difficult process! 
  • "Birds evolved through a unique phase of sustained miniaturisation in dinosaurs," Mr Lee said.
    • jaime5789
       
      Birds evolved due to the dinosaurs becoming smaller!
guzman5862

The Purpose of Crying - HowStuffWorks - 0 views

  • What happens when you cry, exactly? A salty fluid chock full of protein, water, mucus and oil is released from the lacrimal gland in the upper, outer region of your eye. This fluid, better known as tears, then flows down the surface of your eye, across your face and smears your mascara.
    • guzman5862
       
      Why do people cry? A liquid full of protein, water, mucus and oil goes from the lacrimal gland in the back part of your eye and to the top outer part of your eye. 
  • The reasons for our crying changes as we grow from babies to adults. Learn more on the next page.
Nany Rocha

Hyperactivity: Causes, Diagnosis & Treatments - 0 views

    • Nany Rocha
       
      ADHD causes disruptive behaviors and no one knows the cause but it is dangerous when not treated
    • Nany Rocha
       
      Some dangerous causes for hyperactivity are: ADHD which is Attention Deficit Disorder,Bipolar Disorder which is a mental illness marked by extreme from mania to depression,Adrenoleukodystrophy which is several inherited conditions that affect the nervous system and adrenal glands.those can be the reason for hyperactivity but there is one more the most simple explanation for hyperactivity is from eating or drinking a lot of sugar which as you already know causes hyperactivity of an absurd level for example acting drunk.
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