Question

paleontologists identified a gap in fossil records for a time period of approximately 245 years ago. what do they think happened during this time period ? 1. A change in humidity prevented animal remains from fossilizing. 2. An unknown catastrophic event killed off most living creatures. 3.Gradual climate change made the atmosphere unable to support life. 4. The break up of Pangaea disturbed Earth's crust so that all remains were lost.

Answer 1

A change in humidity and The break up of Pangae

Answer 2

1. paleontologist

b

2. how did glacial movement affect

a and e

3. how has the landscape of the Columbia plateau

c

4. which of the following human characteristics describe Seattle

c, f, and g

5. how did Washington's location affect trade

a

6. what statement best expresses the human - environment relationship of natives

a

7. what did early settlers do to the environment

d

8. how did the marriage practices of native people contribute to cultural diffusion among tribes

d

9. what industry in present day Washington has increased

c

10 which region of Washington is characterized by 1000 species

d

11. which region of Washington is characterized by populous cities

b

12. which region of Washington supports logging/mining/hydropower

a

13. Washington region is dominated by river

b

14. how did farmers in the Okanogan highlands adapt to low rainfall

d

15. which statement best describes the impacts of rain shadow

b

Step-by-step explanation: