Geologic Time Review

What type of fossil is shown here?

• Preserved remains

• Carbon film

• Mold

• Cast

Tags

NGSS.MS-LS4-1

Which of these can preserve an organism's remains as a fossil?

• water

• gases

• ice

• oil

Tags

NGSS.MS-LS4-1

Fossils are usually found in layers of

• sediment

• cooled lava

• dead plant matter

• iron metal

Tags

NGSS.MS-ESS2-3

When scientists want to know the exact age of a rock or fossil, they use...

• a magnifying glass

• the law of superposition

• radioactive dating

• a microscope

True or false: folding can cause rock layers to change order.

• True

• False

Tags

NGSS.MS-ESS2-2

The law of __________ states that the oldest rocks are found in the bottom layers.

• age

• superposition

• layering

• fossils

Tags

NGSS.MS-ESS1-4

If an element is radioactive, it means...

• the element is dangerous

• the element will decay over time

• the element is Carbon

• the element does not exist on Earth

If a radioactive element has a half life of 15,000 years, it will take ___________ for half of it to decay.

• 15,000 years

• 30,000 years

• 1,500 years

• 7,500 years

Tags

NGSS.HS-PS1-8

An element has a half life of 1 million years. In 2 million years, how much of the element will be left?

• all of it

• 1/2 of it

• 1/4 of it

• none of it

Tags

NGSS.HS-PS1-8

The longest span of time in Earth's history is...

• the Paleozoic Era

• the Mesozoic Era

• the Cenozoic Era

• Precambrian Time

Tags

NGSS.MS-ESS1-4