Earth's Origin

The cloud of dust and gas that formed the Solar System is known as a

• singularity

• nebula

• supernova

This image of the Sun's early formation, includes the ______________________, all of the dust and rocks that will form the planets.

• accretion disk

• nebula

• supernova

• singularity

Tags

NGSS.HS-ESS1-6

What was the final result of Theia hitting the Earth?

• The gained a lot of mass from the Earth

• A ring around the Earth that coalesced into the Moon

• The Earth was knocked out of its orbit, nearly hitting Venus.

• The Earth was knocked out of its orbit, starting the Late Heavy Bombardment.

Tags

NGSS.HS-ESS1-6

Check all that apply: The Early Earth WAS

• hot

• cool

• molten

• solid

• formed about the same time as the Sun

Tags

NGSS.HS-ESS1-6

The process depicted here - in which the Earth formed its layers - is known as

• densification

• differentiation

• sinking or swimming

The Earth formed layers because

• Heavy elements sank and lighter ones rose while the Earth was still molten.

• Without a solid crust, we couldn't walk on the Earth.

• The Earth cooled after being so hot from all of the collisions that formed it.

When we determine exactly how old a sample is, this is known as

• absolute dating

• relative dating

Tags

NGSS.HS-ESS1-5

When we determine how old a sample is compared to other items near it, that is known as

• absolute dating

• relative dating

Elements go through radioactive decay for what TWO reasons - please check both!!!!

• They have a lot of protons and neutrons - very, very large - and are less stable than smaller elements.

• They want to emit electromagnetic radiation into the Universe.

• They have a stable amount of protons and neutrons in the nucleus.

• They have a different number of neutrons in the nucleus, making it unstable.

Tags

NGSS.HS-PS1-8

We can use radioactive decay to determine exactly how old a sample is because

• each type of element decays at exactly the same rate as every other type of element

• we can sit and observe the rate of decay

• each type of element decays at a unique, but extremely regular rate

Tags

NGSS.HS-PS1-8