Pre-Cambrian Era. Earth formed and became a planet 600-3,300 million years ago.
Paleozoic Era. Ancient life. Volcanoes and mount formed.
Mesozoic Era. Middle life (Industrial Ages, Evolution of human technology)
Cenozoic Era. Present life
False, birds loose their feather 1 by 1.
1. transportation and home/work
2.The rougher the surfaces that are rubbing together, the more friction is produced.
3.In plants, these energy factories are called chloroplasts. They collect energy from the sun and use carbon dioxide and water in the process called photosynthesis to produce sugars.
Answer:
c. the winter
The North Pole is dark for 24 hours a day in <em><u>the winter</u></em>
Hope this helps!
Older layers are toward the bottom.and younger layers toward the top.