Solar System, Stars & Galaxies

Which planet has a very dense atmosphere made mostly of carbon dioxide?

• Jupiter
• Mars
• Earth
• Venus

Which planet does not have a density greater than water?

• Mars
• Saturn
• Jupiter
• Mercury

Which planet has Olympus Mons, the solar system's largest volcano?

• Mars
• Earth
• Saturn
• Io

Which planet rotates backwards, also known as retrograde?

• Venus
• Saturn
• Neptune
• Jupiter

Spacecraft traveling to Jupiter from Earth would most likely have to navigate through or around which natural obstacle?

• Comet's tail
• Neptune
• Saturn's moons
• Asteroid belt

What process has occurred when atoms combine to form a new element and release energy?

• Ionization
• Fission
• Fusion
• Hydrogenation

Which layer of the Sun is seen during a total solar eclipse?

• Corona
• Core
• Photosphere
• Chromosphere

Which of these planets travels around the Sun in less time than it takes Earth to complete one revolution?

• Mars
• Jupiter
• Saturn
• Mercury

The distance from the Sun to the Earth is known as______

• a stellar unit
• an astronomical unit
• a solar unit
• a planetary unit

When objects are moving away their wavelengths are stretched, causing a shift toward the _______ end of the electromagnetic spectrum.

• high frequency
• high energy
• blue
• red