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Birds use their strong breast muscles to flap their wings and give them the thrust to move throught the air and fly. In a way, birds use a swimming motion to get the lift needed to fly.

As water flows in rivers, it picks up small amounts of mineral salts from the rocks and soil of the river beds.

but the salt remains dissolved in the ocean - it does not evaporate. So the remaining water gets saltier and saltier as time passes.

This very-slightly salty water flows into the oceans and seas. The water in the oceans only leaves by evaporating (and the freezing of polar ice),

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.

The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water).

As the rain erodes the rock, acids in the rainwater break down the rock.

Champlain returned to Quebec in 1604 on Pierre de Mont’s expedition. For the next three years, Champlain explored much of the coast of Nova Scotia, the Bay of Fundy and the coasts of Maine, Rhode Island and Massachusetts.

Children who are having a lot of bad dreams are often very worried about going to bed, and may refuse to stay in bed by themselves.

The sense of smell is extremely important in attracting cats (and us) to food and also in aiding tasting food. Cat’s noses are many times more sensitive than our own, so it is believed that their heightened sense of smell assists a great deal in their tasting of different flavors.

So you ask yourself, what does AM and PM stand for? What are the acronyms for AM and PM? What do the initials a.m. and p.m. mean? Both AM and PM come from Latin. AM stands for Ante Meridiem and PM stands for Post Meridiem. Furthermore, Ante Meridiem means before midday (before Noon), and Post Meridiem means after midday (after noon).

Although not the correct acronym, for easy remembering, you could say that AM stands for After Midnight and PM stands for Pre-Midnight or prior to midnight.

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it’s Daylight Saving Time! Daylight Saving Time (or “Summer Time,” as it’s known in many parts of the world) was created to make better use of the long sunlight hours of the summer. By “springing” clocks forward an hour in March, we move an hour of daylight from the morning to the evening. On the first Sunday in November, we “fall back” and rewind our clocks to return to Standard Time.