Quiz Review #2

Which fossil is the oldest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age

Answer explanation

The Law of Superposition: The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.

In this case because Fossil A is at the bottom layer we can say it is the oldest fossil.

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Uses the decay of radioactive elements to find the ___________________________ of a rock or fossil.

• Relative age

• Absolute age

• New age

• Real Age

Tags

NGSS.HS-PS1-8

How old do Paleontologists believe the Earth is?

• 2015 years old
• 3.6 billion years old
• 4.6 billion years old
• 4.6 million years old

Tags

NGSS.MS-ESS1-4

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Answer explanation

The Law of Superposition: The geologic principle that states that in horizontal layers of sedimentary rock, each layer is older than the layer above it and younger than the layer below it.

In this case because Layer A is the highest layer or the layer on top, we can say it is the youngest layer.

Tags

NGSS.MS-ESS1-4

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

• Index fossils

• Limestone fossils

• Amber fossils

• Cast fossils

Tags

NGSS.MS-ESS1-4

Luisa has two older brothers and a younger sister. She had been learning about how to describe the ages of rocks. After thinking about it, she realized she could compare people's positions in her family in the same way that scientists compare rocks. Which geology term would describe the way Luisa compares the positions of people in her family?

• Rock Layers

• Superposition

• Absolute Age

• Relative Age

During (half-life / radiation / energy and particles / radioactive decay), atoms of one element break down into another, more stable element.

• half-life

• radiation

• energy and particles

• radioactive decay

Answer explanation

Radioactive decay is when an atom is too unstable, so it gets rid of extra pieces to become more stable.

Tags

NGSS.HS-PS1-8

Each radioactive element has a constant rate of decay that is called its (energy and particles / radioactive decay / half-life / radiation).  (Select One Below)

• Energy and Particles

• Radioactive Decay

• Half-Life

• Radiation

Answer explanation

Half-life is the time it takes for half of a radioactive substance to decay into a more stable form.

Imagine you have a big bag of popcorn kernels, but only half of them pop every 10 minutes. After 10 minutes, half are popped.

After another 10 minutes, half of what's left pops again. This pattern continues. That’s how half-life works!

Circle the correct word from the options provided for each sentence.

Answer explanation

When atoms of an element break down into another, more stable element, that is called Radioactive Decay.

The constant rate of the decay is called its half-life.

Tags

NGSS.MS-ESS1-4

 For the geological time scale, what is the name for the groups into which eras are divided?

• Precambrian

• Divisions

• Periods

• Sections

Answer explanation

Eras are divided into periods.

Tags

NGSS.MS-ESS1-4