Tides

Which set of objects has the greatest force of gravity between them?

• The bottom pair because the spheres have a greater mass.
• The bottom pair because the spheres are closer together.
• The top pair because the spheres are further apart. 
• The top pair because the spheres have a smaller mass.

T/F: Neap tides are the average high and low tides.

• True
• False

What moon phases occur with spring tides?

• New moon and first quarter
• First and third quarter
• New and full moon
• Full moon and third quarter

What type of tide is represented in the picture?

• Neap tide because of the tidal bulges
• Spring tide because the sun and moon are working together pulling on Earth.
• Spring tide because of where the Earth is in its orbit.
• Neap tide because the sun and moon provide opposite forces on the Earth.

Which pair of objects has the greatest force of gravity between them? 

• The top pair because they are farther apart.
• The bottom pair because they are closer together.
• The top pair because they are moving fast.
• The bottom pair because they are moving slow.

Why do we have tides here on Earth?

• We have tides because of how the moon's gravity pulls on different parts of the Earth.
• We have tides because the Earth's oceans move.
• We have tides only because of the sun's gravity pulling on Earth.
• We have tides because of how the Earth revolves around the sun.

Which type of tide is represented in the picture?

• Neap because the sun and moon are working opposite each other.
• Neap because of the tidal bulges.
• Spring because the sun and moon are lined up and working together.
• Spring because that is where the Earth is its orbit.

What moon phases occur with neap tides?

• New and full moon
• First and new moon
• Third and full moon
• First and third quarter

T/F: Spring tides are the highest of the high and lowest of the low tides we see on Earth.

• True
• False

The sun has more mass than Earth. Why doesn't the moon orbit the sun instead of Earth?

• The moon is closer to Earth than the sun so its gravitational pull is more.
• It does orbit the sun because of Earth's orbit around the sun.
• The Earth has a greater mass than the sun.
• Earth's magnetic field is so strong it pulls the moon close.