Tides

1.

1 point

Which is most responsible for the ocean tides?

the sun

the moon

both contribute equally

none of the above

2.

1 point

The ocean tides raised by the Sun and the Moon on the Earth reinforce each other when ___________________.

the phase of the Moon is first or third quarter.

the Moon is closest to the Earth.

the Earth is closest to the Sun.

the phase of the Moon is new or full.

3.

1 point

The moon orbits Earth in a nearly circular path. The moon follows the orbital path around the Earth because the Earth exerts a-

gravitational pull on the moon directly towards the Earth.

magnetic pull on the moon along the line of the moon's orbit.

gravitational pull on the moon along the line of the moon's orbit.

repulsive force on the moon so that the moon stays a fixed distance away from the Earth.

4.

1 point

If the Earth's moon were half the size it is now, the ocean's tidal variations would be -

smaller due to the decreased gravitational attraction.

smaller due to the increased gravitational attraction.

greater due to increased gravitational attraction.

greater due to the decreased gravitational attraction.

5.

1 point

A squirrel is near the top of a tall tree. The squirrel vigorously shakes a branch to dislodge a nut. Eventually, the nut falls from the tree due to the force of gravity exerted by Earth on the nut. What is another name for this force?

volume

density

weight

mass

6.

1 point

Which statement best describes a gravitational interaction?

It is an attraction between a massive object and Earth's gravitational field.

It is caused by the downward pressure of Earth's atmosphere.

It is an attraction between any pair of massive objects.

It is caused by the force of the rotation of Earth.

7.

1 point

What best explains the reason that astronauts weigh less on the moon than they weigh on Earth?

The moon has less friction than friction.

Astronauts have less mass on the moon than on the Earth.

Astronauts have less density on the moon than on Earth.

The moon has less gravity than Earth.

8.

1 point

If the moon were twice as close to Earth as it is now, the ocean's tidal vibrations would be -

smaller due to the decreased gravitational attraction.

greater due to the increased gravitational attraction

smaller due to the increased gravitational attraction

greater due to the decreased gravitational attraction.

9.

1 point

If the moon disappeared, the earth's tides would ____________.

all be extreme

not be as large

not happen

be much larger

10.

1 point

How much does the sun influence tides on earth?

About as much as the moon

Twice as much as the moon

Several times as much as the moon

Half as much as the moon