Question

1. what is the coldest layer of earths atmosphere? a troposphere b mesosphere c stratosphere d thermosphere 23. which process in the water - cycle involves water soaking into the ground? a runoff b infiltration c condensation d precipitation 24. what is the primary composition of earths outer core? a solid rock b liquid iron and nickel c molten magma

Explanation:

• For question 22: The mesosphere is the coldest layer of Earth's atmosphere as temperatures can drop to very low values there.
• For question 23: Infiltration is the process in the water - cycle where water soaks into the ground.
• For question 24: Earth's outer core is primarily composed of liquid iron and nickel.

Answer:

1. B. Mesosphere
2. B. Infiltration
3. B. Liquid iron and nickel