Why are fossils important in the development of the geologic time scale?

1 answer:

4 0

Fossils are fundamental to the geologic time scale. The names of most of the eons and eras end in zoic, because these time intervals are often recognized on the basis of animal life. Rocks formed during the Proterozoic Eon may have fossils of relative simple organisms, such as bacteria, algae, and wormlike animals

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Please someone answer and help :)

algol [13]

13. D
14. A
15. C
16. B
17. F
18. E

7 0

3 years ago

Desiré was investigating a chemical reaction.When she heated it up, she found that sulfuric acid changed into water. She made th

pochemuha

Answer:

no it is not a complete model

3 0

3 years ago

What is the change in air pressure over a given distance called? wind speed air pressure force factor air pressure gradient

lubasha [3.4K]

The change in pressure over a given distance is defined as a pressure gradient. The strength of this pressure gradient determines how fast the wind moves from higher pressure toward lower pressure. A stronger pressure gradient will cause stronger winds, as shown in Figure 2. >> Balanced in the vertical by the force of gravity

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3 years ago

All the substances listed below are fertilizers that contribute nitrogen to the soil.

kvv77 [185]

Answer:

Ammonia is the richest source of nitrogen on a mass percentage basis because it has 82.35% of nitrogen by mass.

Explanation:

Percentage of element in compound :

$=\frac{\text{number of atoms}\times text{Atomic mass}}{\text{molar mas of compound}}\times 100$