4-3 Could there be life on other planets? - Vocabulary

What do you call a scientist who studies outer space?

• astronomer

• biologist

• geologist

• chemist

Which word describes the air that surrounds a planet?

• atmosphere

• carbon dioxide

• solar system

• exoplanet

What is the opposite of "dim" when describing visible light?

• bright

• dark

• cold

• cloudy

Which gas do plants sometimes take in and animals release when they breathe?

• carbon dioxide

• oxygen

• nitrogen

• hydrogen

What is an exoplanet?

• A planet that orbits a star outside of our solar system

• A planet that orbits the Sun

• A small moon

• A star that is very far away

What is the Goldilocks zone?

• The area around a star that is not too hot or too cold for liquid water to exist

• A place where only gold is found

• The center of a planet

• A region with the most stars

Which word means a place with conditions where a living thing can survive?

• habitable

• bright

• dim

• telescope

What is a solar system?

• All the objects that orbit around a star

• A group of planets with no star

• A single planet and its moon

• A collection of telescopes

What tool is used to make very distant objects look closer, especially in space?

• telescope

• microscope

• binoculars

• magnifying glass

Which of the following best describes a planet?

• A large, round object in outer space that orbits a star

• A small rock in space

• A bright light in the sky

• A tool for looking at stars