Question Bank for Grade 6 Science

What causes surface currents?

• wind

• salinity

• temperature

• density

What causes deep currents?

• differences in density

• wind

• weather

• Coriolis effect

Which process will increase the salinity of ocean water?

• evaporation

• currents

• Coriolis effect

• density

How will the melting of icecaps change the salinity of ocean water?

• raise the salinity
• lower the salinity
• no change to the salinity
• I have no idea

As the ocean depth increases, how to temperature and density change?

• it gets colder and more dense
• it gets colder and less dense
• it gets warmer and more dense
• it gets warmer and less dense

What is a deep valley in the ocean formed at a convergent boundary?

• continental shelf

• mid-ocean ridge

• trench

• abyssal plain

What is a long, underwater mountain chain formed at a divergent plate boundary?

• trench

• mid-ocean ridge

• continental shelf

• continental rise

What is the measure of the amount of dissolved salts in a liquid?

• density
• salinity
• density
• Coriolis effect

What is the primary cause of waves?

• wind

• density

• salinity

• the moon

as salinity increase density

• increases
• decreases
• stays the same