Chapter 10.2 Test Corrections

Our Solar system consists of which of the following? (Select all that apply)

• Planets

• Moons

• Star

• Dwarf Planets

• Asteroids and Comets

Answer explanation

Our Solar system consists of planets, moons, a star, dwarf planets, and asteroids and comets.

What is the measurement of choice to measure distance IN OUR SOLAR SYSTEM? Select All that Apply

• None of the above

• Light Years

• Inches

• Meters

• Feet

Answer explanation

The correct choice is None of the above as light years, inches, meters, and feet are not used to measure distances within our solar system.

How do they measure the astronomical units?

• Distance from the Center of earth to the center of the moon

• The distance it takes the earth to go around the sun

• Distance from the center of the sun to the center earth

• The distance from the center of our solar system to the edge of the solar system

• None of the Above

Answer explanation

The correct way to measure astronomical units is by determining the distance from the center of the sun to the center of the earth.

Which is smaller?

• Astronomical Unit

• Light year

• One measures time and the other measures distance so you can not compare the two

Answer explanation

The Astronomical Unit is smaller than a Light year. One measures distance while the other measures time, so they cannot be directly compared.

If we measured all the mass in our solar system, (a)   would the sun take up?

• 75%
• Over 99%
• About 25%
• Only about 5%
• None of these

Answer explanation

The correct choice is 'Over 99%' because the sun makes up over 99% of the mass in our solar system.

The four inner planets....

• are larger than the outer planets

• have many moons

• Colder than the outer planets

• are made mostly of rock and metals

• None of these

Answer explanation

The correct choice is that the four inner planets are made mostly of rock and metals, distinguishing them from the outer planets.

True or False, a year on earth is the same as a year on Mars.

• True

• False

Answer explanation

False because a year on Mars is longer than a year on Earth due to the longer orbital period of Mars around the sun.

Pluto is considered a what?

• None of these

• planet

• asteroid

• moon

• Comet

Answer explanation

Pluto is considered none of these options as it is no longer classified as a planet, asteroid, moon, or comet.

Which of these was how the beginning of our solar system started? Select all that apply

• Gravity pulling atoms and particles together

• Giant Clouds of dust and gas made of helium and hydrogen called nebulas

• The big bang made our solar system directly

• Atoms fusing together creating nuclear fusion made our star

• None of these

Answer explanation

The beginning of our solar system started with gravity pulling atoms and particles together, giant clouds of dust and gas called nebulas, and atoms fusing together creating nuclear fusion to form our star.

Match the following options with the correct statement about the age of the Earth and the solar system.

• This option is a common misconception about the age of the Earth and the solar system.

• About 4.5 Trillion years ago

• This option does not match any known scientific estimate for the age of the Earth and the solar system.

• About 1 million years ago

• This option overestimates the age of the Earth and the solar system by a large margin, according to scientific estimates.

• About 2000 years ago

• This option also underestimates the age of the Earth and the solar system, according to scientific estimates.

• About 4.5 Million Years ago

• This option significantly underestimates the age of the Earth and the solar system, according to scientific estimates.

• None of these

Answer explanation

The correct answer is 'None of these' as Earth and the rest of the solar system formed about 4.5 billion years ago, not any of the provided options.