AFFECTS
TIME
CAUSES
SPRING V NEAP
100

Tides affect marine ecosystems by influencing these two types of things that live there.

What are plants and animals?

100

Beaches have this amount of high tides.

What is two?

100

This causes high and low tides.

What is gravity?

100

These occur twice each lunar month (29 days) all year long without regard to the season.

What are spring tides?

200

Plants and animals that live along the shoreline have to do this to survive.

What is anchor?

200

Two high tides and two low tides occur this often.

How long is 24 hours and 50 minutes?

200

Tides are the rising and falling of this.

What is the sea?

200

Spring tides occur this many times per month.

How long is twice?

300

Plants and animals that live along the shoreline have to survive these.

What are waves?

300

This is different based on where you are.

What is the rise and fall of tides?

300

The moon pulls on the this closest to it making it bulge out.

What is the ocean?

300

These, which occur twice a month, happen when the sun and moon are at right angles to each other.

What are neap tides?

400

One kind of animal borrows under the sand as these come and go.

What are waves?

400

High tides occur this far apart.

How long is 12 hours and 25 minutes.

400

The moon's gravity also pulls the earth toward it, making it high tide on this side of the earth as well.

What is the opposite?

400

Neap tides, which also occur twice a month, happen when this and the moon are at right angles to each other.

What is the sun?

500

This kind of animal borrows under the sand to survive.

What are sand crabs?

500

It takes 12.5 minutes for this at the shore to go from high to low.

What is water?

500

The gravity of the moon also pulls this to it.

What is the Earth?

500

Neap tides, which also occur twice a month, happen when the sun and this are at right angles to each other.

What is the moon?