5.5A Physical Properties of Matter

Front

What is density?

Back

Density is the mass of an object divided by its volume. It determines whether an object will float or sink in a fluid.

Front

Which materials are typically less dense than water?

Back

Materials like cork, wood, and certain plastics are usually less dense than water, allowing them to float.

Front

What does it mean if an object is more dense than water?

Back

If an object is more dense than water, it will sink when placed in water.

Front

What is thermal conductivity?

Back

Thermal conductivity is a measure of how well a material conducts heat. Metals typically have high thermal conductivity.

Front

Why do we use insulating materials?

Back

Insulating materials are used to reduce the transfer of heat, keeping hot things hot and cold things cold.

Front

What is an example of a good insulator?

Back

Plastic is a good insulator and is often used to cover electrical wires.

Front

What happens to the density of an object when it is heated?

Back

When an object is heated, it usually expands, which can decrease its density.

Front

What is the relationship between mass and volume in determining density?

Back

Density is calculated by dividing mass by volume (Density = Mass/Volume). A larger mass with the same volume increases density.

Front

What is buoyancy?

Back

Buoyancy is the ability of an object to float in a fluid, which is determined by the object's density compared to the fluid's density.

Front

How does temperature affect the density of liquids?

Back

As temperature increases, most liquids expand and become less dense.