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The Planets

Test Description: Many different characteristics of the planets within the solar system.

Instructions: Answer all questions to get your test result.

1) The radius of the Earth is approximately

A637 km B637,000 km C63,700 km D6,370 km

2) Three planets known as gas giants because of their large size and low density are

AVenus, Neptune, and Jupiter BVenus, Uranus, and Jupiter CJupiter, Saturn, and Venus DJupiter, Saturn, and Uranus

3) The average temperature of the planets

Adepends only on the chemical composition of the atmosphere of each planet Bdecreases with greater distance from the Sun Chas no relationship to the distance from the Sun Dincreases with greater distance from the Sun

4) Why are impact structures (craters) more common on the surface of Mars than on the surfaces of Venus, Earth, and Jupiter?

AMars has a strong magnetic hold that attracts iron-containing rock fragments from space. BThe thin atmosphere of Mars offers little protection against falling rock fragments from space. CMars has the greatest surface area and receives more impacts. DThe tiny moons of Mars are breaking into pieces and showering its surface with rock fragments.

5) Which planet has vast amounts of liquid water at its surface?

AVenus BJupiter CEarth DMars

6) Which planet's day is longer than its year?

AJupiter BMars CMercury DVenus

7) Compared to the distances between the planets of our solar system, the distances between stars are usually

Aabout the same Bmuch greater Cmuch less Dnone of the above

8) The Earth is slightly flattened from a perfect spherical shape because of

Aits molten core Bstorms on the sun's surface Cits rotation Dthe pull of the sun and moon

9) Which of the following is not a characteristic of the Jovian planets?

Athey have low average density. Bthey have large diameters. Cthey have orbits outside the asteroids. Dtheir composition lacks hydrogen.

10) The shape of the orbits of most of the planets in the solar system would best be described as

Aparabolic Belliptical and very elongated Cnearly circular Dperfectly circular

*select an answer for all questions

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