Stars

 Kristin likes to look at the stars at night. She wonders why she can't see the stars in the daytime. Which of the following best explains why the stars are not visible during the day?

• The Sun is positioned between Earth and the stars during the day.
• The Moon is positioned between Earth and the stars during the day.
• The Sun is so dim that it overwhelms the light of the other stars.
• The Sun is so bright that it overwhelms the light of the other stars.

The astronomy club at a local middle school uses its telescope to observe stars. Some students have identified two celestial objects as being main sequence stars. What is a common characteristic shared by these main sequence stars?

• their masses
• their diameters
• their distances from Earth
• their temperature ranges

The different colors observed in stars are mostly due to different

• surface temperatures.
• atmospheres.
• distances.
• masses.

Which of the following best explains why nighttime stars appear so much smaller than the Sun?

• The sky is darker at night.
• The stars are farther from Earth.
• The stars are all smaller than the Sun.
• The Moon blocks out light from the stars.

Some stars look brighter than others because

• they are made of different things.
• they are closer to Earth.
• they are reflecting light from the Sun.
• they are in different constellations.

What is the Sun?

• a constellation
• a planet
• a moon
• a star

If two stars have the same temperature and are the same distance from Earth, then the brighter star is

• faster.
• larger.
• slower.
• smaller.

Why do stars appear to be different sizes in the night sky?

• They are different distances from Earth.
• They are burning at different temperatures.
• They are burning different gases that make different size circles.
• They are part of complex constellations that need stars of different sizes

The Sun is the star that gives energy to Earth. Why does Earth not get energy from other stars?

• Other stars are too big.
• Other stars are too small.
• Other stars are too close to Earth
• Other stars are too far away from Earth.

Why does the Sun appear large and bright from Earth?

• It is the closest star to Earth.
• It is the largest star in the universe.
• It is the brightest star in the universe
• It is the only star that can be seen from Earth.