2023_Cambridge IGCSE and O Level Computer Science Second Edition

___ is the process by which plants make their food using sunlight.

Photosynthesis.

___ is the layer of gases surrounding the Earth.

Atmosphere.

___ is the primary gas found in Earth's atmosphere.

Nitrogen.

___ is the process of water vapor cooling and turning into liquid water.

Condensation.

___ is the term for a group of stars, gas, and dust bound together by gravity.

Galaxy.

___ is a natural satellite that orbits a planet.

Moon.

___ is the force that pulls objects toward each other.

Gravity.

___ is the change from a solid state directly to a gas state, skipping the liquid state.

Sublimation.

___ is the smallest unit of an element.

Atom.

___ is the layer of the Earth's atmosphere where weather occurs.

Troposphere.