Density and Pressure

What is the formula to calculate density?

• Density = Mass / Volume

• Density = Weight / Volume

• Density = Volume / Mass

• Density = Mass x Volume

How does the density of an object change if its volume increases?

• The density of the object will remain the same.

• The density of the object will increase.

• The density of the object will fluctuate.

• The density of the object will decrease.

Explain the relationship between pressure and depth in a fluid.

• Pressure in a fluid increases with depth.

• Pressure in a fluid decreases with depth.

• Pressure in a fluid remains constant with depth.

• Pressure in a fluid is not affected by depth.

Why does a helium balloon float in the air?

• Helium balloons are filled with hot air that makes them rise.

• Helium is magnetic and attracts to the Earth's core.

• Helium has a special coating that repels gravity.

• Helium is lighter than the surrounding air.

What happens to the pressure inside a closed container if the volume decreases?

• The pressure inside a closed container increases if the volume decreases.

• The pressure inside a closed container becomes negative if the volume decreases.

• The pressure inside a closed container decreases if the volume decreases.

• The pressure inside a closed container remains the same if the volume decreases.

Compare the density of water and oil.

• Oil is denser than water.

• Oil is less dense than water.

• Water is denser than oil.

• Water and oil have the same density.

How does the density of a gas change with an increase in temperature?

• The density of a gas remains constant with an increase in temperature.

• The density of a gas becomes solid with an increase in temperature.

• The density of a gas decreases with an increase in temperature.

• The density of a gas increases with an increase in temperature.

Describe how pressure is affected when force is applied to a smaller area.

• Pressure decreases

• Pressure increases

• Pressure becomes negative

• Pressure remains constant

Why does a submarine have to withstand high pressure at great depths?

• To improve visibility in deep waters

• To prevent collapsing under the immense pressure.

• To provide more space for crew members

• To increase speed underwater

Explain why a cork floats on water while a metal coin sinks.

• The cork floats due to being magnetic, while the metal coin sinks because it repels water.

• The cork floats due to being less dense than water, while the metal coin sinks because it is denser than water.

• The cork floats due to being transparent, while the metal coin sinks because it is opaque.

• The cork floats due to being heavier than water, while the metal coin sinks because it is lighter than water.