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All organisms that require oxygen to carry out their metabolic functions are referred to as ____________.

Match the following letters with the correct label. Circsystem8edit2.png

6) Which of the following is **not** evidence for a large impact on Earth 65 million years ago?

7) A plutino is a trans-Neptunian object in 2:3 orbital resonance with:

14) What conditions are required for nuclear fusion of hydrogen to occur inside the Sun?

20) From the center outward, which of the following lists the “layers” of the Sun in the correct order?

3) What produces meteor showers?

17) What is the solar activity cycle?

11) What is a hot Jupiter?