NSCAS Science Review

Front

What is density?

Back

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

Front

How can you determine if one liquid is more dense than another?

Back

You can compare the liquids by observing which one floats on top of the other; the less dense liquid will float.

Front

What is a complete circuit?

Back

A complete circuit is a closed loop that allows electricity to flow, enabling devices like bells to operate.

Front

What is a conductor?

Back

A conductor is a material that allows electricity to flow through it easily, such as copper.

Front

What is the difference between a conductor and an insulator?

Back

A conductor allows electricity to flow, while an insulator resists the flow of electricity.

Front

What happens to gas particles when they are heated?

Back

When gas particles are heated, they move faster and spread apart, causing the gas to expand.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

How can magnets be used to separate mixtures?

Back

Magnets can attract magnetic materials, allowing for the separation of substances like iron from sand.

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons through a conductor.

Front

What is evaporation?

Back

Evaporation is the process by which liquid turns into gas, often due to heat.