Earth Science 2022 9th grade

Which of the following correctly describes the earth's layers from outermost to innermost?

• solid crust, outer core, inner core, mantle

• solid crust, solid yet moldable mantle, liquid outer core,

  solid inner core

• solid yet moldable mantle, solid inner core and outer core and crust

• solid inner core, liquid outer core,

  solid yet moldable mantle, solid crust

Planetary differentiation (layering of the earth) occurs because of what property of matter?

• convection

• density

• mass

• volume

What process occurs in the mantle (asthenosphere) that causes the plates to move?

• hydrolysis

• radiation is causing heat transfer within the core.

• convection currents caused by heat transfer from the core.

• carbonation

Scientists use which kind of waves to determine the properties of Earth’s internal layers?

• light waves

• sound waves

• seismic waves

• ocean waves

Tags

NGSS.MS-PS4-2

Primary “P” waves travel through which layers of the Earth?

• all layers

• crust, mantle, and inner core

• outer core only

• inner core and outer core

What is the term for the process when particles within the solar system collide with each other forming larger and larger bodies due to gravitational pull?

• Accretion

• Aggregation

• Building

• Nebula

Which of following about the moon is TRUE?

• The moon's makeup is very similar to the Earth's because another planet struck our earth and the pieces of our earth accreted to form the moon.

• The moon is mostly very dense. In fact it is much denser than the earth that's why it is smaller.

• Our moon is one of the smallest in the solar system. There are only 2 satellites smaller.

• It is impossible to see the moon during the day

Evidence shows that there are two potential ways that water got here on earth. Those two ways are:

• Asteroids and it formed during the accretion of our planet in the mantle.

• Volcanic eruptions on Mars and asteroids

• Comets and asteroids

• it formed during accretion of our planet in the mantle and the water cycle brought it here

What objects helped set a baseline of time for our evidence so we could compare all other evidence to it in order to determine how long ago our planet formed...

• Jack Hill rocks

• Chondrite meteors

• Martian meteors

• Moon rock samples

According to the evidence we studied when was the Earth formed?

• 4.4- 4.6 years ago.

• 4.5 - 4.6 thousand years ago.

• 4.5 -4.6 million years ago.

• 4.5 or 4.6 billion years ago.