Year 8 waves and tides Quiz

What causes tides?

• The force of gravity

• Gravitational pull of the earth

• Gravitational pull of the moon and sun

• Gravitational pull of the sun

Why is the gravitational pull of the moon greater than that of the sun in causing tides?

• The moon is far away from the earth

• The sun is far away from the moon

• The moon is bigger than the sun

• The moon is closer to the earth than the sun

Which of the following statements is correct about tides?

• In high tide the level of water on the beach will rises

• In low tide there are no waves.

• Tides happen once a year

• All the above

Waves are caused by wind blowing over the sea surface. Choose 1.

• TRUE

• FALSE

Which statement best explains why waves break when they reach the shore?

• The wave speed speed is lost

• Shallowness of water makes the wave lose energy

• The wind stops blowing

• The cliff stops the waves

Swash occurs when the wave breaks and water returns to the sea.

• TRUE

• FALSE

Backwash occurs when water from a breaking wave rushes up the shore/beach.

• TRUE

• FALSE