Answer:
B
Explanation:
it is the energy stored in the chemical bonds of a substance
Answer:
C. Extinctions have occurred many times throughout the Earth's history.
Explanation:
Yes they are a pure substance
I believe the best answer is D.
All answers contribute to a machine, if there is an all above choice, chose that.
Well that's a not easy task. <span>The specialized forecasters analyze near-real-time ground- and space-based observations to assess the current state of the solar environment which includes the areas from the Sun to the Earth and points in between. Space weather forecasters also analyze the pattern of solar activity. </span>
