Could there be life on other planets? vocab

the air that surrounds a planet

• atmosphere

• stratosphere

• troposphere

• ionosphere

a scientist who studies outer space

• astrophysicist

• geologist

• astronomer

• meteorologist

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

• star

• moon

• planet

• asteroid

a place with conditions where a living thing can survive

• habitable

• inhospitable

• sterile

• barren

describes when there is not a lot of visible light; the opposite of bright

• dim

• bright

• luminous

• glow

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

• Goldilocks zone

• Habitable zone

• Frost line

• Radiation belt

a type of gas that plants sometimes take in and that animals release when they breathe

• oxygen

• nitrogen

• carbon dioxide

• hydrogen

describes when there is a lot of visible light; the opposite of dim

• dim

• bright

• dark

• faint

a planet that orbits a star outside of our solar system

• exoplanet

• dwarf planet

• supernova

• black hole

a tool used to make very distant objects look closer, often used to look at space.

• microscope

• telescope

• binoculars

• periscope