Unit 2 Test Review

Front

What evidence do scientists use to determine that the Earth has layers?

Back

Seismic waves data.

Front

What is one reason Earth's tectonic plates move?

Back

Convection currents in the mantle.

Front

What can be concluded about the magnetic field on Mars compared to Earth?

Back

Mars has a weaker magnetic field.

Front

Why is the iron in the inner core solid while the iron in the outer core is liquid?

Back

The inner core experiences more pressure, which causes the iron to be solid even at extremely high temperatures.

Front

What type of heat transfer occurs in fluids due to temperature differences?

Back

Convection.

Front

Define 'Seismic Waves'.

Back

Seismic waves are waves of energy that travel through the Earth, often as a result of earthquakes.

Front

What is the composition of Earth's outer core?

Back

The outer core is composed of liquid iron and nickel.

Front

Explain the role of convection currents in the mantle.

Back

Convection currents in the mantle are caused by the heat from the Earth's core, leading to the movement of tectonic plates.

Front

What is the primary reason for Earth's magnetic field?

Back

The flowing metallic outer core generates the Earth's magnetic field.

Front

How does pressure affect the state of iron in the Earth's core?

Back

Increased pressure in the inner core causes iron to be solid, despite high temperatures.