Quarter 4 Sequence 3 Science Test Brightness

Tyrone notices that headlights of a car coming toward him at night seem to change. Which statement best describes how the car headlights appear to change?

• The headlights seem to get dimmer as the car gets closer.

• The headlights seem to get smaller as the car gets closer.

• The headlights seem to get brighter as the car gets closer.

• The headlights actually get brighter as the car gets closer.

The table shows data about five stars and their distances from earth. Which star is farthest from Earth? (light years is a unit of measurement like miles)

• Sirius

• Rigel

• Vega

• Canopus

The table shows data about five stars and their distances from earth. Which star is closest to Earth?

• Sirius

• Rigel

• Vega

• Canopus

A________ is a huge ball of very hot matter that gives off energy.

• comet

• asteroid

• star

• planet

_________ is the way something appears based on our location. It gives the impression that something is different because of distance.

• Apparent

• Light year

• Astronomy

• Perspective

True or False: When we look into the sky, and see a brighter star, that means that it is bigger than other stars.

• True

• False

All of the stars in the chart, except for the sun, have similar actual brightnesses. The numbers 1-4 are a ranking of the four stars according to apparent brightness when viewed from Earth.

Which star appears dimmest from Earth?

• Sirius

• Hadar

• Acrux

• Adhara

Which two stars in the table are the next closest to Earth after the sun?

• Acrux and Adhara

• Hadar and Adhara

• Hadar and Acrux

• Vega and Hadar

The sun is the smallest of all the stars listed in the table. It also releases the least amount of energy. Why does the sun appear to be the brightest star in the sky?