Forces
Living & Earth Systems
Space
Matter
Energy
100

This internal force happens when an object is squeezed or pushed together.

Compression

100

This is the term for the living things in an ecosystem.

Biotic Factors

100

This is the star at the center of our solar system.

The Sun
100

These are the three states of matter.

Solid, Liquid, Gas

100

These energy resources can naturally be replaced over time.

Renewable resources

200

This property allows materials like clay or playdough to permanently change shape.

Plasticity 

200

This process allows plants to make glucose using sunlight, water, and carbon dioxide.

Photosynthesis

200

This robotic vehicle can move across the surface of planets and analyze rocks and soil.

A rover

200

This phase change happens when a liquid turns into a gas.

Evaporation

200

This renewable energy source uses moving air to generate electricity.

wind energy

300

This force resists movement between rubbing surfaces.

Friction

300

This greenhouse gas is released when fossil fuels are burned and traps heat in Earth’s atmosphere.

Carbon Dioxide

300

This force keeps planets orbiting the Sun.

Gravity

300

This is the temperature at which water freezes on the Celsius scale.

0°C?

300

This type of energy resource cannot be replaced quickly once it is used up.

Nonrenewable Resources

400

This internal force twists an object.

Torsion

400

This type of consumer eats both plants and animals.

Omnivore

400

This planet is known for its spectacular ring system.

Saturn 

400

This process explains why liquids in a thermometer rise when heated.

Thermal Expansion

400

This energy source is burned for heat and light and is directly usable.

Wood

500

According to Newton’s Third Law, every action has this.

An equal and opposite reaction

500

This type of consumer eats dead plants, animals, and waste and returns nutrients back to the soil.

Decomposers

500

Name TWO tools scientists use to explore space.

  • telescopes,
  • probes,
  • rovers,
  • spacecraft,
  • space stations?
500

Why are expansion joints important in bridges?

They allow materials to expand and contract with temperature changes without causing damage.

500

Name TWO energy sources that require processing before they can be used.

  • fossil fuels,
  • nuclear energy,
  • biofuels,
  • solar energ