Unit 8 Test Review

Which of the following represents characteristics of the four planets farthest from the Sun?

Gas giants

Mars is very similar to Earth. Which of the following statements describe a property of Earth, but not a property a property of Mars?

An abundance of liquid water is located on the planet.

The Milky Way galaxy is described as a disk of stars orbiting a central point on the disk. Which of these best explains why people on Earth cannot see the entire shape of the Milky Way?

Earth is part of this galaxy.

According to the Mass of Planets table above, which planet has the greatest gravitational force?

Jupiter

What planet was Galileo observing when he discovered the Galilean moons?

Jupiter

According to the Mass of Planets picture in the image, on which planet would a person weigh the least?

Mercury

Which planet takes 165 years to complete a single orbit, the longest revolution of any planet around the Sun?

Neptune

Why does it take Neptune so long to revolve around the Sun?

Neptune is such a long distance away that it has a lorge orbital path.

The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest?

Planets, stars, nebulae, galaxies

Which of the represents characteristics of the four planets closet to the sun?

Rocky (terrestrial) planets

In space travel, a probe is a vehicle designed to carry instruments, but not crew. To which of the following places would we most likely send a probe?

Saturn

Which of the following best describes meteor?

Solids that range in size from dust to small rocks that are scattered throughout the solar system, often due to the breakup of comets of comets, that burn in a bright display when they enter Earth's atmosphere.

What movements are involved in the relationships between the Earth and Sun?

The Earth revolves around the Sun as it rotates to cause day and night.

Why does Earth get more energy from the sun than from all the other stars in the universe combined?

The Sun is much closer than the other stars.

Many objects within our solar system remain in constant motion and maintain predictable orbital patterns. What force governs the motion and patterns of objects in our solar system?

The force of gravity keeps planets, asteroids, and comets orbiting in an elliptical pattern around the Sun.

Which of the following accurately describes the orbital path of most planets in our solar system?

The orbital path is in an ellipse but looks almost circular.

Which statement below accurately describes the movement of objects in our solar system?

The planets revolve around the Sun, and moons revolve around the planets.

The Sun is the center of the solar system and creates a large amount of gravitational force. If this system lost the Sun, what would happen to the planets?

The planets would travel on a different path.

Scientist observed a rocky, rotating object orbiting in space. It was 250 km wide. The rocky object was located several times farther away from the Sun than the Earth. The object most likely -

an asteroid

Which is made mostly of ice?

comet

All the planets in out solor system have about the same -

shape