Demes page 3

What is an irregular galaxy?

• A galaxy without a defined shape, often containing young, bright stars and still forming stars.

• A galaxy with spiral arms and a central bulge.

• A galaxy that is always circular in shape.

• A galaxy that only contains old stars.

Which of the following is a property of Gas Giants like Jupiter and Saturn?

• They are large, made mostly of hydrogen and helium, and have a small rocky core.

• They are small and made mostly of rock.

• They have no moons or rings.

• They are closer to the Sun than Earth.

What is gravity?

• A force of attraction between two objects with mass.

• The energy produced by stars.

• The movement of planets around the Sun.

• The process of nuclear fusion.

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What does Newton's Law of Universal Gravitation state?

• Every object in the universe attracts every other object.

• Only large objects attract each other.

• Gravity only works on Earth.

• The Sun attracts only the planets.

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According to Newton's Law, what happens to gravitational pull as mass increases?

• Gravitational pull increases.

• Gravitational pull decreases.

• Gravitational pull stays the same.

• Gravitational pull disappears.

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What is mass?

• The amount of matter in an object.

• The brightness of a star.

• The distance between two objects.

• The color of a star.

If the distance between two objects increases, what happens to the gravitational force between them?

• It decreases.

• It increases.

• It stays the same.

• It becomes zero.

What does apparent magnitude measure?

• How bright a star appears from Earth.

• The actual size of a star.

• The distance to a star.

• The temperature of a star.

What does absolute magnitude measure?

• The brightness a star would have if it were at a standard distance from Earth.

• The color of a star.

• The mass of a star.

• The age of a star.

What does a star's color indicate?

• Its surface temperature.

• Its distance from Earth.

• Its age.

• Its mass.