The hydrosphere is composed of

a. all of the plants and animals in the water

b. all of the water and water vapor on earth

c. ice

d. air

Select all the true statements about the cosmic microwave background radiation

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

What happens during the experiment stage of the scientific method