NCFE Practice Test #3

The diagram below shows the rock cycle.
Which two processes result in the formation of igneous rocks?

• Melting and solidification
• Sedimentation and evaporation
• Crystallization and cementation
• Compression and precipitation

The diagram below shows the Moon revolving around Earth as viewed from space. 
What makes it possible to see the Moon from Earth?

• The surface of the Moon emits its own light, which can be seen from Earth.
• The Moon absorbs light during the day and emits the light at night.
• Light emitted by Earth illuminates the Moon's surface, making it visible.
• Light emitted by the Sun is reflected to Earth by the Moon's surface. 

The solid part of Earth's surface is called the _________.

• Hydrosphere
• Lithosphere
• Troposphere
• Atmosphere

When rocks melt, what do they become?

• Lava
• Magma
• Sandstone
• Marble

What causes the motion of the plates?

• Convection in the mantle of Earth
• Gravity
• The magnetic field of Earth
• The turning of Earth

When two plates slide, one under the other, it is called _________.

• A plate collision
• Subduction
• A transform fault
• Seafloor spreading

Which explains why the fork looks different under water?

• Light is refracted at an angle.
• The wavelength of light lengthens.
• Light cannot pass through the glass.
• The amount of light increases when going through water.

Which item is designed to change electrical energy into heat energy?

• Alarm clock
• Hand dryer
• Fan
• Telephone

Earth is composed of four layers. Many scientists believe that as Earth cooled, the denser materials sank to the center and the less dense materials rose to the top. The least dense layer is the _________.

• Crust
• Mantle
• Outer core
• Inner core

A sixth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?

• Plastic straw
• Cotton string
• Aluminum foil
• Rubber eraser