Weather & Water: Investigation 3 Practice

After a few minutes, what happens to the hot water (red water)?

• It cools and becomes more dense
• It cools and becomes less dense

After a few minutes, what happens to the cold water in a vial that is placed in a cup of hot water?

• It warms up and gets less dense
• It warms up and gets more dense

Which image shows what a convection current could look like?

• 
• 
• 
• 

Hot water is ______________ cold water.

• less dense than

• more dense than

• the same density as

What is one way to change the density of a liquid?

• change the color of the liquid

• add more liquid

• change the temperature of the liquid.

What is the density of water?

• 0 g/mL
• 1/2 g/mL
• 1 g/mL
• 2 g/mL

The heat source for our planet is _________.

• wind

• carbon

• the sun

• nitrogen

What happens as the candle heats up the smoke?

• The smoky air heats up and rises, becoming less dense.

• The smoky air extinguishes the flame on the candle.

• All the smoky air disappears through the holes on top.

• The smoky air becomes colder and more dense.

In this vial, what color liquid likely has the greatest density?

• Blue

• Red

• Purple

• Green

Picture yourself sitting on a beach on a hot summer day. The temperature of the air above the sand is about 12°C warmer than the air above the ocean water.

True or false: The air above the water is denser than the air above the sand.

• True

• False