Astro Unit Two Review

Mass Is a measure of how difficult it is to change an objects motion and How much "stuff" is in something.

• True

• False

The acceleration due to gravity on the surface of the Earth is 9.8 m/s². What is the approximate acceleration of gravity experienced by astronauts on the space station?

• 8.8 m/s2

• 7.8 m/s2

Gravity affects anything with mass, but it can also affect things without mass including light and the space time continuum.

• True

• False

Only objects that are circling the Earth are considered to be in "orbit".

• True

• False

Only objects that are circling the Earth are considered to be in "orbit"

• True

• False

Only large objects, such as planets and stars, can produce a gravitational force.

• True

• False

Astronauts in the international space station feel weightless because...

• They are falling at the same rate as the space station

• They are in zero gravity

If two objects move further apart by a factor of 2, the gravitational force will become

• 4x less

• 8x more

• 2x less

• 9 x more

The Earth's Escape velocity, the velocity needed to escape the Earth's gravitational field, is...

• 11 KM/s

• 34 KM/s

• 9 KM/s

• 1 KM/s

Which planet is largest in size?

• Jupiter

• Saturn

• Uranus

• Neptune