Earth and Space Science

What is a more scientific term for the "giant, flattened, spinning cloud of gas, dust, and other material"?

Where did the gas and dust in a nebula come from? (select all that apply)

• left over from a supernova explosion

• escaped from a black hole

• remnants of the big bang

• a giant sneeze

Which process describes gravity pulling together clumps of rocky material to form larger clumps?

• accretion

• gravitational collapse

• frost line

• celestial clumping

Which stage of the Nebular Theory would come after the formation of planets?

• accretion disk

• gravitational collapse

• heavy bombardment

• main sequence Sun

Tags

NGSS.HS-ESS1-6

In radioactive decay, which of these is present first and will undergo decay to form the new isotope?

• mother isotope

• daughter isotope

• parent isotope

• original isotope

In the decay of Carbon-14 to Nitrogen-14, nitrogen is considered the...

• daughter isotope

• parent isotope

• stable isotope

• mother isotope

The amount of time it takes for an isotope to decrease to 50% (half) of its original number is known as the....

On a graph, a parent isotope would start at ___% and the daughter isotope would start at ____%.

• 100%; 0%

• 0%; 100%

• 50%; 50%

• 75%; 25%

On a graph, after 1 half-life, a parent isotope would be at ___% and the daughter isotope would be at ____%.

• 100%; 0%

• 0%; 100%

• 50%; 50%

• 75%; 25%

On a graph, after 2 half-lives, a parent isotope would be at ___% and the daughter isotope would be at ____%.

• 0%; 100%

• 50%; 50%

• 75%; 25%

• 25%; 75%