Geologic Time Answers

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What was the significance of collisions of dust, rock, and ice during Earth’s formation?

to modify the density of materials present on Earth

to facilitate heat absorption from the surrounding space

to blow away a strong burst of particles from the first atmosphere

to harden materials to form different parts of Earth’s layers

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Which led to the formation of oceans after water on Earth’s surface evaporated?

The sun released a strong burst of water vapor.

As Earth cooled, water in the atmosphere condensed.

Materials collided due to strong gravitational forces.

The ozone layer formed to protect against harmful UV ray exposure.

What is the purpose of a geological time scale ?

It used to predict natural disasters throughout Earth’s history.

It is used to present the correct sequence of events in the Earth’s history.

It is used to determine the absolute dates in years for different periods.

It used to create a naming system for flora and fauna.

What caused Earth's oceans to begin forming during Precambrian Time?

Earth's temperatures increased, causing evaporation

Comets added frozen water directly to the oceans

Oxygen levels increased due to photosynthesis

Water vapor condensed as Earth's surface cooled

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