Floating and Sinking in Water Quiz

What is the first reason why some things float and other things sink in water?

• Buoyancy

• Density

• Temperature

• Weight

Why do rocks sink in water?

• Because they are less dense than water

• Because they are more dense than water

• Because they have a low density

• Because the buoyancy push is strong

What is buoyancy?

• The downward push of fluid against anything in it

• The temperature difference in water

• The upward push of fluid against anything in it

• The weight of water pushing objects down

Why do hot air balloons float?

• Because the hot air inside is heavier than the cooler air outside

• Because the hot air inside is cooler than the air outside

• Because the hot air inside is less dense than the cooler air outside

• Because the hot air inside is more dense than the cooler air outside

How do meteorologists study air movement in the atmosphere?

• By measuring the weight of air parcels

• By imagining small "parcels" of air that act like bubbles in the bigger air around them

• By observing the color changes in the sky

• By tracking the movement of clouds only

What causes warmer air parcels to rise?

• They are denser than cooler air parcels

• They are less dense than cooler air parcels

• They have a stronger buoyancy push downwards

• They are the same density as cooler air parcels