2425 IA1 Practice Test

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that can be separated by physical processes.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together and cannot be separated by physical processes.

Front

What does it mean for a substance to be pure?

Back

A pure substance consists of only one type of particle and has a uniform and definite composition.

Front

How can you identify a pure substance using particle diagrams?

Back

Pure substances are represented by particle diagrams that show only one type of particle.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What happens to an object that is less dense than the fluid it is placed in?

Back

An object that is less dense than the fluid will float.

Front

What happens to an object that is more dense than the fluid it is placed in?

Back

An object that is more dense than the fluid will sink.

Front

How does temperature affect the density of liquids?

Back

Generally, as temperature increases, the density of liquids decreases.

Front

What is the principle of buoyancy?

Back

The principle of buoyancy states that an object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced.

Front

What is the relationship between mass and density?

Back

Density is calculated by dividing mass by volume; therefore, for a given volume, an increase in mass results in an increase in density.