Ocean circulation

Waves are formed when

• Wind scrap across the ocean

• Water level increases

• Water level decreases

Tsunami is a Japanese word that means

• Destroy

• Harbour waves

• Huge waves

The rhythmic rise and fall of ocean water twice in a day is called

• Ocean current

• tide

• Wave

The movements that occurs in oceans can be broadly categorised as

• Waves and tides

• Currents

• Both

If sun, moon and earth is in the same line then which tide is caused ?

• Neap

• Spring

• High tide

When the moon is in its first and last quarter then which tide is caused?

• Neap tide

• Low tide

• High tide

The rise and fall of water due to tides is being used to generate

(a)  

The moon is the most relevant factor in the creation of

• Tides

• Waves

• Wind

High tide occurs

• Once a day

• Twice a day

• Thrice a day

what Type of waves are caused by earthquake?

• Seismic waves

• Wind surge

• sea waves