stars and gravity

Which statement about the sun is true?

• It is the closet star to earth.

• It is the brightest star in the sky.

• It is a planet that gives off light.

• It is the brightest planet in the solar system.

The sun is a star that gives off energy. Which forms of the sun's energy reach the earth?

• light and heat

• light and sound

• heat and electricity

• light and electricity

The sun is the same size as many stars that we see at night. In fact, it is much smaller than many. Why does it look so much bigger and brighter?

• because it is very hot

• because it is closer to earth

• because it is yellow in color

• because it shines during the day

Look at the picture of an astronaut's view from the space shuttle as it orbits the earth. From the window, she can observe stars and the sun. How would the appearance of the sun compare to the other stars seen by the astronaut?

• The sun would appear dimmer than the stars because the sun has a higher temperature.

• The sun would appear brighter than the stars because the sun is closer to the earth.

• The sun would appear smaller than the stars because the sun is a medium sized star.

• The sun would appear larger than the stars because the sun is a planet.

What effect does the sun have on the room? Select all the correct responses.

• It heats up the room.

• It cools down the room.

• It lights up the room.

• It has no effect on the room.

If you place a thermometer in the sunlight, what will happen to the temperature?

• It will increase.

• It will decrease.

• It will not change.

How will the night sky look different when looking through a telescope rather than with the unaided eye?

• The stars will appear farther away.

• Most of the stars will seem much smaller.

• They will be able to see many more stars.

• Stars that looked red will now appear blue.

What force causes the water to return to the fountain?

• wind pushing up

• pull of Earth's gravity

• heat from the sun

• magnetic pull

How do birds overcome gravity?

• They avoid gravity by flying very quickly.

• They use the force of their wings to overcome gravity.

• They use heat to overcome gravity.

• They are too light in weight to be pulled by gravity.

Which is NOT an example of overcoming gravity?

• an airplane flying through the air

• shooting a basketball towards the hoop

• a kite being blown by the wind

• a leaf falling to the ground