Identify the TRUE statement. Choose one:

A. Our Sun is the only star we know of that has planets associated with it.

B. The only two planets with moons are Earth and Jupiter.

C. The Sun accounts for almost 50% of the Solar System's mass.

D. The composition of the giant (Jovian) planets is mainly gas and ice.

Question

Megan Powell

Geography

19 June, 21:37

Identify the TRUE statement. Choose one:

A. Our Sun is the only star we know of that has planets associated with it.

B. The only two planets with moons are Earth and Jupiter.

C. The Sun accounts for almost 50% of the Solar System's mass.

D. The composition of the giant (Jovian) planets is mainly gas and ice.

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Answers (1)

Know the Answer?

Mason Beltran · Answer 1

D. The composition of the giant (Jovian) planets is mainly gas and ice.

Explanation:

Giant planet that is not composed mostly of rock or other solid matter but of fluids (gas and ice); although said planets may have a rocky or metallic core. It is believed that such a nucleus is probably necessary for a gas giant to form, but most of its mass is in the form of gas, or compressed gas in a liquid state.

Unlike rocky planets, gas giants do not have a well defined surface. Terms such as diameter, surface area, volume, surface temperature or surface density can refer to the outer layer seen from outside, for example from Earth.

In the Solar System there are four gas giants: Jupiter, Saturn, Uranus and Neptune. These planets are also known as the "Jovian planets." Uranus and Neptune have been considered by scientists as a separate subclass of giant planets, frozen giants, also called "uranium planets", due to their structure mainly composed of ice, rock and gas. They differ from "traditional" gas giants, such as Jupiter and Saturn, because their proportion of hydrogen and helium is much lower, mainly because of their greater distance from the Sun.