Lesson 2 - Why Is the Sun Brighter Than Other Stars? REVIEW

Which color star is hottest?

• blue

• white

• yellow

• red

Why does only a small part of a star’s light reach Earth?

• The sun absorbs most of the light.

• The atmosphere blocks most of the light.

• The light is destroyed by the darkness of space.

• The light spreads out as it moves through space.

Distances in space are so great, they are often measured in _________.

• meters

• light-years

• feet per second

• centimeters

Tags

NGSS.MS-ESS1-3

The sun has the highest apparent brightness to Earth because it

• is closer to Earth than any other star.

• is larger than any other star.

• produces more light than other stars.

• is hotter than other stars.

How does the temperature of these stars affect their apparent brightness?

• The greater the temperature, the greater the apparent brightness.

• Blue stars have great apparent brightness, while all other stars have similar apparent brightness.

• All these stars will have less apparent brightness than the sun.

• Blue stars will always be visible compared to other stars.

Why do stars produce bright light? Because they are

(a)  

Rays (a)   as they move away from a star.

What is a light-year?

• a unit of space

• a unit of time

• a unit of energy

• a unit of distance

___________ affects a star’s apparent brightness.

• The sun

• size, distance, temperature

• Ocean's

• Growing

Hotter stars are __________than cooler stars

• brighter

• dimmer

• redder

• smaller