Ch. 10.5 - Early Earth

Ch. 10.5

Early Earth

Multiple Choice

It is estimated that Earth formed

• 6 thousand years ago

• 2 million years ago

• 4.6 billion years ago

• 10 billion years ago

Multiple Select

Select each of the following that scientists used to determine the age of the Earth

• radioactive dating of Earth rocks

• human fossils

• Radioactive dating of Moon rocks

• fossils of plants and animals

Multiple Select

Select each of the following physical features that formed during Earth's first several hundred million years

• animals

• oceans

• continents

• atmosphere

Multiple Choice

Volcanic eruptions and comets hitting the early Earth brought ___________ to the surface.

• atmospheric gases and water

• animal life

• continents

• plant life

Multiple Choice

True or False? It rained for a very long time in the early days of Earth and this caused a lot of erosion on Earth's rocky surface.

• True

• False

Multiple Choice

Scientists believe these were the first organisms to evolve on Earth.

• humans

• plants

• birds

• single celled organisms

Open Ended

How would Earth's atmosphere be different if organisms capable of photosynthesis had not evolved?