What is the Sun?

What is a star?

The Sun is a star which gives off energy. Which form of the Sun's energy reach the Earth?

A. light and heat
B. light and sound
C. heat and electrical
D. heat and mechanical

Darnell knows that the Sun's energy travels through space to the Earth. Which is not an effect of the Sun's energy on the Earth?

A. It warms the Earth's oceans
B. It causes objects to fall to the Earth
C. It lights up the Earth's daytime sky
D. It warms up the Earth's land masses

John and Mark are looking up into the night sky and talking about why stars look like tiny points of light in the night sky. Which of the following is the correct reason why stars appear to be so small in the night sky?

A. In the night sky all objects look small.
B. Stars do not give off much light.
C. All stars in the night sky are very far away.
D. All stars are much smaller than our Sun.

Nina is observing two stars in the night sky. Nina notices that Star A appears brighter than Star B. Which best explains why Star A appears brighter to Nina?

A. Star A is smaller than Star B.
B. Star A is the same size as Star B.
C. Star A is closer to Earth than Star B.
D. Star A is farther away from Earth than Star B.