Tides

Most coastal areas on Earth experience two high tides and two low tides every lunar day. What is a lunar day? Our days on Earth are 24-hour solar days, the time that it takes for a specific site on the Earth to rotate from an exact point under the sun to the same point under the sun. A lunar day is the time it takes for a specific site on the Earth to rotate from an exact point under the moon to the same point under the moon. A lunar day is 24 hours and 50 minutes. That means a lunar day is 50 minutes longer than a solar day.

If the first low tide occurs at 5:10 AM on Friday, when will the next low tide occur?

• 5:10 AM Saturday

• 5:10 PM Friday

• 5:35 PM Friday

• 6:00 PM Friday

Tags

NGSS.MS-ESS1-1

Most coastal areas on Earth experience two high tides and two low tides every lunar day. What is a lunar day? Our days on Earth are 24-hour solar days, the time that it takes for a specific site on the Earth to rotate from an exact point under the sun to the same point under the sun. A lunar day is the time it takes for a specific site on the Earth to rotate from an exact point under the moon to the same point under the moon. A lunar day is 24 hours and 50 minutes. That means a lunar day is 50 minutes longer than a solar day.

If high tide occurs at 8:00 AM, Tuesday, in Savannah, Georgia, at approximately what time will the next high tide occur?

• 8:00 AM Wednesday

• 8:00 PM Tuesday

• 8:25 PM Tuesday

• 8:50 AM Wednesday

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-4

Neap tides, relatively weak tides, occur when the Moon is in position(s)

• A.

• B.

• A and C.

• B and D.

Tags

NGSS.MS-ESS1-1

Large tides, called spring tides, are experienced in the Earth's oceans when the moon is in position

• A.

• B.

• A and C.

• B and D.

Tags

NGSS.MS-ESS1-1

Which factor is MOST responsible for the ocean tides?

• the wind

• earthquakes

• the moon's gravity

• density differences in the water

Tags

NGSS.MS-PS2-4

Tides are caused by

• gravity.

• heat.

• waves.

• winds.

Tags

NGSS.MS-ESS1-1

NGSS.MS-PS2-4

As shown in the diagram, Earth has two tidal bulges, one caused directly by the Moon’s gravity and the other caused by

• Earth’s gravity.

• the Sun’s gravity.

• the ocean currents.

• the ocean’s inertia.

Tags

NGSS.MS-ESS1-1

Besides the moon, the daily tides around the world are MOST affected by the

• sun.

• wind.

• rain

• Coriolis effect.