tides and gravity review

Both the moon and the sun influence the tides on Earth due to the force of gravity. The moon has a much greater influence on the tides than the sun. Why is that?

• The sun much less dense than the moon.

• The sun is much farther away from Earth than the moon.

• The moon orbits the Earth while the Earth orbits the sun.

• The sun is a star and is gaseous rather than solid like the moon.

The planets in our solar system orbit the Sun. Consider the gravitational force between the Sun and the planets. Based on mass alone, the gravitational force would be the GREATEST between the Sun and

• Earth.

• Jupiter.

• Mercury.

• Saturn.

Magnetism is a

• force.

• form of energy.

• form of electricity.

• power.

Gravity on the Moon is about 1/6th the gravity felt on Earth. This is because

• The Moon has a stronger gravitational pull than Earth.
• The Moon is made of different materials than Earth.
• The Moon has less mass than Earth.
• The Moon is closer to the Sun than Earth.

Which planet has the GREATEST attraction to the Sun?

• Venus
• Mercury
• Jupiter
• Mars

The tilt of the Earth's axis of rotation is responsible for the -

• Formation of ocean currents
• Shift in Earth's magnetic poles
• Increase in atmospheric pressure
• Change in seasons and length of daylight hours

The Moon and the Sun both affect the tides on Earth. This evidence BEST supports the hypothesis that

• tides are caused by the rotation of the Earth
• the tides are not influenced by the Moon and the Sun
• the tides are caused by the gravitational pull of the planets
• celestial bodies have an influence on Earth's tides

The planets in our solar system move around the Sun because of

• magnetic force
• gravitational force
• friction
• solar wind

What causes the Moon to orbit around the Earth?

• Gravitational pull between the Earth and the Moon
• The Moon's desire to stay close to the Earth
• Solar wind pushing the Moon towards the Earth
• Magnetic force between the Earth and the Moon

Which location of the moon relative to the sun and earth may produce a lunar eclipse?

• Full moon phase
• Third quarter phase
• New moon phase
• First quarter phase