Solar System: CA3 Review

Proxima Centauri is the closest star to the Earth other than the Sun. Proxima Centauri is so dim that it cannot be seen from Earth without a telescope. Other stars that are much farther away can be seen without a telescope.

Which of these is most likely true about the stars that are farther away from Earth than Proxima Centauri is but that can still be seen without a telescope?

• They are bigger than Proxima Centauri.

• They burn less bright than Proxima Centauri.

• They are closer to the Sun than Proxima Centauri is.

• They are colder than Proxima Centauri.

There are many objects that can be seen in space. There are more _______ in the night sky than _______.

• planets; stars

• Suns; stars

• stars; planets

• Earths; Moons

What kinds of technology have helped scientists learn about the Earth and its moon?

• space missions

• space probes

• telescopes

• all of these

The diagram below shows the Earth's position in relation to the Sun during two different months of the year.In the Northern Hemisphere, there are fewer hours of daylight per day in December than in June. Why is this true?

• The Earth is much closer to the Sun in December than it is in June.

• The Earth is much closer to the Sun in June than it is in December.

• The Northern Hemisphere is pointed toward the Sun and receives more sunlight per day in December.

• The Northern Hemisphere is pointed away from the Sun and receives less sunlight per day in December.

The diagram below represents the positions of the Earth and Sun during different times of the Earth year. Based on the information in the diagram, what causes the Earth to have seasons?

• the Earth's revolution around the Sun only

• the Earth's tilt and its rotation on its axis

• the Earth's rotation on its axis only

• the Earth's tilt and its revolution around the Sun

Drew wanted to make a model of part of the solar system. He decided to model the Sun and the orbits of the two closest planets to the Sun. However, when Drew showed his teacher his model, she noticed that there were a few errors. Which of the following is incorrect in Drew's model?

• Earth is shown as being the closest planet to the Sun.

• The shapes of the planets' orbits are incorrect.

• The model is not to scale because it shows the Earth as being larger than the Sun

• all of these

Which of the following is a result of the Earth's tilt?

I.Days are longer during the summer than during the winter.

II.Tides change throughout the day.

III.Seasons change throughout the year.

• I, II, and III

• II and III only

• I and III only

• III only

The diagram below shows one way to model the Solar System. What is a limitation of this model?

• It does not show the relative distance of each planet from the Sun.

• It does not correctly show the relative sizes of the planets.

• It does not correctly show the order of the planets.

• It does not include all of the major planets in the Solar System.

The Sun is a star. Scientists have explained that the reason the Sun looks larger than other stars is that the Earth is much closer to the Sun than to other stars.

Lena has noticed some of the stars in the night sky look smaller than others.

What is the best prediction that Lena could make about the stars?

• The stars that look smallest are closest to the Earth.

• All stars are the same distance from the Earth.

• The stars that look largest are closest to the Earth.

• The stars that look largest are moving toward the Earth.

Planets and stars look very similar. How can people on Earth tell that planets and stars are different?

• There is no way to tell that planets and stars are different.

• Over time, planets and stars move differently in the sky.

• Planets move in the sky, but stars are always fixed.

• Planets never move, but stars rise and set.