Answer:the first one is external stimulus
And the second one is migration
Explanation:
Sound can be both longitudinal waves and transverse waves.
Answer:
1. earliest evidence of liquid water
2. oldest rock sample
3. first chemical signature of life
4. first cratons
5. oldest undisputed fossils
Explanation:
Earliest evidence of liquid water (4.40 Ga)
Oldest rock sample (4.03 Ga)
First chemical signature of life (3.8 Ga)
The first cratons (3.2 to 2.7 Ga)
Oldest undisputed fossils (3.2 Ga)
I guess "Earths Tilt and Rotation" because the north pole might be in winter and the south pole would be in summer based on the earths rotation.
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