Wednesday 1/25 Bell Ringer

Tides are caused by ____.

• strong winds that blow over ocean waters

• the gravitational interaction of Earth, the moon and the sun

• the shifting of the plates on the ocean floor

• variations in the salinity of ocean water

Tags

NGSS.MS-PS2-4

NGSS.MS-ESS1-2

What type of tides would this arrangement of earth-moon-sun create? (The sun and moon are mostly in a line with Earth)

• Neap tide

• Spring tide

• Diurnal tide

• Fall tide

Answer explanation

The sun and moon work together to make the high tides higher and the low tides lower.

Tags

NGSS.MS-ESS1-1

What type of tide would this arrangement of earth-moon-sun create? (The sun and moon are approximately at a right angle to each other with Earth at the corner.)

• Fall tide

• Semidiurnal tide

• Neap tide

• Spring tide

Answer explanation

The sun and moon compete against each other to make the high tides not so high and the low tides not so low

Tags

NGSS.MS-ESS1-1

NGSS.MS-PS2-4

Which exerts a stronger gravitational pull on Earth's oceans?

• The Sun
• the Moon

Answer explanation

Even though the sun is WAY bigger than the moon, it is 93 million miles away so it has about half the effect on the tides as the moon has.

____ is what you call an area with two high and two low tides each day.

• Diurnal Tide

• Semidiurnal tide

• Spring tide

• Neap tide

If the moon were to move CLOSER to Earth, which of the following would be true?

• High tides would get higher

• High tides would get lower

• There would be no change to the tides

• High tide and Low tide would have litte difference in size.

Answer explanation

Having the moon closer would cause a stronger gravitational attraction between it and Earth, including the ocean water.

Venus is about 3.5 times as large as Earth's moon but it has no significant effect on Earth's tides. Why?

• Because Venus is so far away from Earth.

• Because Venus is closer to the sun and that cancels the effect of Venus.

• Because Mars cancels the effect of Venus.

• Venus has no gravity associated with it.

Answer explanation

Venus can be as close as about 28,000,000 miles from Earth and as far as about 152,000,000 miles from Earth. This is too far away to have any significant effect on our tides.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

North Carolina beaches have 2 high and 2 low tides every day. If the beach is at high tide at noon, what will you see if you look again about 6 hours later?

• High tide

• Low tide

• Spring tide

• Neap tide

Tags

NGSS.MS-ESS1-1

What do we call it when the gravity of the sun and moon compete against each other to make the high tides not so high and the low tides not so low?

• Neap tide

• Spring tide

• Diurnal tide

• Fall tide

Answer explanation

The sun and moon are approximately at a right angle to each other with Earth at the corner.

What type of tide will occur at 9:30 a.m.?

• low 
• high 
• none
• high and low

Tags

NGSS.MS-ESS1-1