There was no life on Earth for the first billion years because the atmosphere was not suitable for life. Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air.
Answer:15 miles per hour
Explanation:in 2 hours he moved 30 miles so just get the half of it
Answer:
it will perform photosynthesis at a lower rate. Explanation: anthocyanin is not directly involved in photosynthesis. At low light levels ...
Explanation:
Answer:
B, C, D
Explanation:
The following statements are true regarding the continental crust;
It is between 25 and 70 km thick
Its made of all types of rocks
It contains silicate minerals high in sodium, potassium, aluminum, and calcium
