8th Qt 2 Review

The graph below shows the wide range of wavelengths in the radiation (radiant energy) from the sun.

Which type of radiation has the largest range of wavelengths in meters (m)?

• X-rays

• Gamma rays

• microwaves

• radio waves

Sound waves can move at different speeds.

What can affect the speed at which sound waves travel?

• the amplitude of sound waves

• the material through which sound waves travel

• the distance over which sound waves travel

• the frequency of sound waves

Long-term space travel by humans would require new advances in technology. One proposal is to grow plants on spaceships sent on long missions.

Which of the following is NOT a possible benefit of this technological advancement?

• providing food for the astronauts to eat

• producing oxygen for astronauts to breathe

• removing carbon dioxide from the air

• protecting astronauts from cosmic radiation

Which part of the electromagnetic spectrum below consists of electromagnetic waves which carry the most energy?

• x-rays

• visible light

• infrared light

• ultraviolet light

Telescopes use electromagnetic radiation to produce different views of planetary images.

Which type of electromagnetic radiation does the curved mirror in a reflecting telescope collect and focus?

• infrared radiation

• radio waves

• ultraviolet radiation

• visible light

Margot tries to identify different types of light from the electromagnetic spectrum based on their wavelengths. She is shown 4 graphs representing a different part of the electromagnetic spectrum.

Which graph most likely represents gamma rays?

• 
• 
• 
• 

Earth’s spheres interact in many ways.

Which describes how the hydrosphere and atmosphere interact?

• A heavy snowfall adds mass to a glacier.

• Ocean currents influence weather patterns.

• Magma erupts and releases trapped gases.

• Polluted air kills several animal species.

Each of Earth’s spheres is characterized by specific processes.

What is one example of how the cryosphere interacts with the hydrosphere?

• Sea ice melts, adding water to the oceans.

• Ice reflects 50% more sunlight than does water.

• Strong winds cause sea ice to change directly to water vapor.

• The ice covering Antarctica provides breeding sites for penguins.

The surface of the moon, which is rocky, is covered with craters that were formed when meteorites struck its surface. Earth’s surface, which is also rocky, shows fewer meteorite impacts.

Which statement below explains why there are so few meteorite craters on Earth?

• There is more weathering and erosion on the moon’s surface than on Earth’s surface.

• The moon's gravity shields Earth from most of the meteoroids on a path for Earth.

• Earth’s atmosphere causes most meteoroids to burn up before they impact.

• Earth’s crust is rockier than the moon’s, so meteorite impacts rarely make craters.

The atmosphere helps keep the planet within the correct temperature range to sustain Earth’s life forms.

How does water vapor help moderate Earth’s climate

• Water vapor reflects thermal energy from the sun.

• Water vapor absorbs some thermal energy from Earth’s surface and reradiates it back to the lower atmosphere

• Water vapor produces thermal energy in the atmosphere.

• Water vapor absorbs some thermal energy from clouds and reradiates it back into space.