Lesson 6 - The Tides

Question 1

Fill in the blanks:

_ _ _ _ _ causes the ocean to move all day long.

Answer 1

Waves

Question 2

Fill in the blank:

_ _ _ _ _ causes the ocean to rise and fall twice a day.

Answer 2

Tides

Question 3

What is the main cause of tides?

Answer 3

The moon’s gravity.

Question 4

What is the tidal force?

Answer 4

The moon’s gravitational force pulls on the Earth’s water - the force is the moon’s gravity.

Question 5

What is tidal bulge?

Answer 5

Tidal force causes the water to bulge towards the moon. This force can cause the Earth to squeeze, and makes the water bulge on both sides - which is causes by inertia.

Question 6

What explains the second high tide?

Answer 6

When the Earth squeezes because of the tidal force, the tides happen on both sides of Earth.

Question 7

How is climate change affecting tides? (One reason)

Answer 7

Climate change is causing temperatures to grow, which can lead to higher tides as higher temperatures melt the ice/glaciers causing more water flow.

Question 8

What is inertia?

Answer 8

Inertia: objects that are moving keep moving. Objects that are resting stay resting unless an external force acts on them.

Question 9

What is the water’s highest point called?

Answer 9

High tide

Question 10

What is the water’s lowest point called?

Answer 10

Low tide

Question 11

What is high tide flooding?

Answer 11

High tide flooding is when a high tide occurs and causes the water to flow onto the land/ The high tide will be approximately 2 feet above the average high tides.

Question 12

How does a spring tide occur?

Answer 12

When the Sun, Moon, and Earth are aligned for a full or new moon, the gravitational forces of the sun and moon combine resulting in larger waves called spring tides.

Question 13

How does a neap tide occur?

Answer 13

Neap tides occur when the sun and moon are perpendicular to each other. This means there will be lower high tides and higher low tides. During neap tides, the high tides are not so high, and the low tides are not so low.

Question 14

True or false - the height of the tides are influenced by the gravitational pull of the Sun than that of the Moon

Answer 14

False

Question 15

What is the tidal range?

Answer 15

The vertical difference between the height of the high and low tides.

Question 16

True or false - the difference in levels of ocean water at high and low tides is in the tidal range

Answer 16

True

Question 17

True or false - neap tides occur during new moon or full moon

Answer 17

False

Question 18

Approximately, how often do tides occur?

Answer 18

Every 12 hours and 25 minutes