A rowing team is a group of people working together. If each man pulled his oar when he felt like it, the team would never get anywhere—much less win a race. So, like all teams, they have a…
Inside a leaf there are millions of tiny packages of color—yellow, orange, and green. The yellow is called xanthophyll, the orange is carotene, or carotin, and the green is chlorophyll. The green…
All the earth’s water isn’t in seas, lakes, ponds, and rivers. A lot of it is beneath your feet—down in the ground. When rain falls, much of the water seeps down through the soil. It keeps going…
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