Observing the Stars

To look up at the stars is called__.

• looking

• gazing

• observing

• staring

The apparent __ is how a star looks from Earth.

• light

• dimness

• distance

• brightness

Our sun is a __- sized star.

• small

• medium

• large

• extra large

Stars that are far away appear __ even though they might be brighter than our own Sun.

• brighter

• farther

• closer

• dimmer

The Sun is the star at the __ of our solar system.

• edge

• outside

• center

• distance

The Sun supplies __ and __ to Earth.

• light heat

• gas light

• gas heat

• energy gas

The Sun's enormous __ keeps the solar system in orbit.

• size

• water supply

• oxygen

• gravity

A star is a giant ball of __ that is found in the center of a solar system.

• planet

• fire

• gas

• yellow lemon drops

The __ brightness of a star is how it is perceived by someone on Earth.

• actual

• apparent

• estimated

• real

The amount of energy given off by light

• luminosity

• light

• heat

• energy