U1S6 Physical Properties

Physical Science

What is boiling point?

The temperature at which a liquid becomes a gas.

What is buoyant force?

The upward force on an object in a fluid.

What is conductivity?

The ability of a substance to transfer heat or electricity.

What are physical properties?

Characteristics of matter that can be observed or measured without changing the substance's identity.

What is density?

The amount of mass in a given volume.

What is melting point?

The temperature at which a solid becomes a liquid.

What is solubility?

The ability of one substance to dissolve in another.

What is a physical change?

A change in which matter changes form but the identity of the substance stays the same.

What does conserved mean in science?

Unchanged; in a physical change, the total amount of matter stays the same.

What does matter make up?

All organisms and objects.

What is matter made of?

Very small particles called atoms.

How can matter be measured?

By its mass, weight, and volume.

What happens to matter during a physical change?

It changes in form or appearance, but its identity and amount are conserved.

Give examples of physical properties.

Density, boiling point, melting point, solubility, conductivity, buoyant force.

Give examples of physical changes.

Melting ice, boiling water, dissolving sugar in water.

What determines whether an object floats or sinks?

If the object's density is less than the fluid, the buoyant force makes it float; if greater, it sinks.