Earth in Space
Earth Systems
Matter & Energy
Waves & Light
Life Science
100


This motion of Earth causes daytime and nighttime.

What is rotation?

100

The thickest Earth layer where convection currents occur.

What is the mantle?

100

Matter in this state has no definite shape or volume.

What is a gas?

100

The highest point of a transverse wave.

What is a crest?

100

Plants use this process to make sugar using sunlight.

What is photosynthesis?

200

When the Northern Hemisphere tilts away from the Sun, this season occurs there.

What is winter?

200

This type of boundary forms mountains and volcanoes when plates collide.

What is a convergent boundary?

200

Heat moving through direct contact is called this.

What is conduction?

200

Sound waves are this type of wave.

What are longitudinal waves?

200

The colorful parts of a flower help attract these.

What are pollinators?

300

These tides happen when the Sun, Earth, and Moon line up.

What are spring tides?

300


This rock type forms when magma or lava cools and hardens.

What is igneous rock?

300

Warm air rising and cool air sinking is an example of this type of heat transfer.

What is convection?

300

The distance from crest to crest is called this.

What is wavelength?

300

Plants bending toward light is an example of this tropism.

What is phototropism?

400

During this event, Earth’s shadow falls on the Moon.

What is a lunar eclipse?

400

This soil particle is the smallest and holds the most water.

What is clay?

400

This method measures the volume of an irregular object using water.

What is volume displacement?

400

Light bending when it moves from air into water is called this.

What is refraction?

400

This gas is released by plants during photosynthesis.

What is oxygen?

500

Earth takes this amount of time to travel once around the Sun

What is 365.25 days (1 year)?  

500

The Earth layer made mostly of liquid iron and nickel.

What is the outer core?

500

The transfer of heat through electromagnetic waves.

What is radiation?

500

The amount of energy carried by a wave is related to this property.

What is amplitude?

500

The male flower structure that produces pollen.

What is the stamen (or anther)?