The Sun- vocab

Front

Celsius

Back

Metric unit for temperature; water freezes at 0 and boils at 100.

Front

Hydrogen

Back

simplest, lightest, most common element

Front

Helium

Back

2nd lightest element, used to fill balloons

Front

Fusion

Back

coming together

Front

Nuclear fusion

Back

Process the sun uses to generate energy by fusing two elements.

Front

Atoms

Back

smallest unit of matter

Front

Elements

Back

A molecule of one kind of atom; cannot be broken into simpler units (e.g., hydrogen, helium, gold).

Front

Water cycle

Back

Continuous process of water moving from Earth's surface to the atmosphere and back.

Front

Mass

Back

Amount of matter in an object

Front

Red Giant

Back

A large, reddish star late in its life cycle.