Exam 23: Planets and Their Moons

Geologists think that the eroded surfaces, alluvial fans, and Valles Marineris indicate that the Martian climate was once __________ and that __________ flowed across the surface.

The presence of igneous rocks on the Moon tells us that:

Titan's large size and low temperature allow it to have an atmosphere.

The temperature on the sunny side of the planet __________ reaches 427°C, while the shady side is -175°C.

Jupiter's middle layer, between its core and outer sea of liquid hydrogen, is composed of __________ __________ __________.

The Venusian surface:

The chemical composition of Jupiter is most similar to that of __________.

The Jovian planets-Jupiter, Saturn, Uranus, and Neptune-have retained most of their hydrogen, helium, and other light elements.

Saturn would float on water if there were a basin large enough to hold it.

Jupiter, Saturn, Uranus, and Neptune all have relatively small rocky or metallic cores surrounded by swirling liquid and gaseous atmospheres.

__________ is the most active volcanic body in the Solar System.

The Venusian atmosphere is __________.

The Earth's atmosphere is thinner than that on Mars.

The Solar System formed from a:

Which of the following statements is not correct about Mars?

The rings of Saturn may be the debris of a __________ that got too close to the planet.

Which of the following is not a terrestrial planet?

Solar wind blew away most of the hydrogen, helium, and other light elements from the inner planets.

Why has the Earth remained geologically active compared to the Moon?

Some meteorites contain small, round grains about 1 millimeter in diameter called __________, which contain amino acids or other organic molecules.