
At high altitudes, there is less oxygen. Oxygen is a gas in the air. Our bodies need oxygen to survive. When we do not have enough oxygen, we get sick.
Photo Credit: Adam Sternin/Cavan Images/Image Source
Landforms can be different shapes. Landforms can be different sizes. … read more
Corn gives off water. All plants do. And it isn’t … read more
Elana Meyers Taylor races in a sled called a bobsled. … read more
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