Density and Buoyancy

Front

What is the measure of how much mass is in a given volume?

Back

density

Answer explanation

The measure of how much mass is in a given volume is called density. It is calculated by dividing mass by volume, making density the correct answer among the options provided.

Front

How "packed" or "crowded" the particles are describes density.

Back

true

Answer explanation

The statement is true because density is defined as the mass of particles in a given volume, which directly relates to how packed or crowded the particles are.

Front

What is the formula to find density?

Back

D = M / V

Answer explanation

The correct formula for density is D = M / V, where D is density, M is mass, and V is volume. This formula shows that density is calculated by dividing mass by volume.

Front

The upward force that fluids exert on objects is called?

Back

buoyancy

Answer explanation

The upward force that fluids exert on objects is known as buoyancy. It allows objects to float or rise in a fluid, making buoyancy the correct answer, while mass, volume, and density refer to different properties.

Front

Archimedes' Principle states that the buoyant force on an object is _________ to the weight of the fluid it displaces.

Back

equal

Answer explanation

Archimedes' Principle states that the buoyant force on an object is equal to the weight of the fluid it displaces. This means that when an object is submerged, the upward buoyant force matches the weight of the displaced fluid.

Front

If an object FLOATS, then its density is _________ than the density of the fluid that it is in.

Back

less

Answer explanation

If an object floats, it means it is less dense than the fluid it is in. This is because objects with lower density than the fluid will displace enough fluid to support their weight, allowing them to float.

Front

If an object SINKS then its density is _______ than the fluid it is in.

Back

greater

Answer explanation

If an object sinks, it means it is denser than the fluid. Therefore, its density is greater than that of the fluid it is in, which is why it cannot float.

Front

What happens to MOST substances when they are HEATED?

Back

they expand

Answer explanation

When most substances are heated, their particles gain energy and move apart, causing the substance to expand. This is a common physical property observed in solids, liquids, and gases.

Front

Which is the densest version of H2O? Options: liquid water, ice, water vapor

Back

liquid water

Answer explanation

Liquid water is denser than ice and water vapor. Ice has a crystalline structure that makes it less dense, while water vapor is in gaseous form, making it the least dense. Therefore, liquid water is the densest version of H2O.

Front

What will happen to an object if its density and the density of the fluid it's in are EQUAL?

Back

It will be suspended between the surface and bottom of the water.

Answer explanation

When an object's density equals the fluid's density, it experiences neutral buoyancy, causing it to be suspended in the fluid rather than sinking or floating.