8th grade Semester 1 Exam

Front

What classification of elements includes copper, gold, and iron?

Back

Metal: Elements that are shiny, conduct electricity, and can be shaped or drawn into wires.

Front

What is a suspension in terms of mixtures?

Back

A suspension is a heterogeneous mixture where solid particles are dispersed in a liquid but not dissolved.

Front

Which color of visible light has the shortest wavelength?

Back

Violet: It has the shortest wavelength in the visible spectrum.

Front

Between which points does water boil in a temperature change diagram?

Back

Water boils between points 3 to 4.

Front

Define solubility.

Back

The ability to dissolve in a solvent.

Front

What are the characteristic properties of metals?

Back

Metals are shiny, good conductors of heat and electricity, malleable, and ductile.

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including visible light.

Front

What is the difference between a solution and a suspension?

Back

A solution is a homogeneous mixture where substances are completely dissolved, while a suspension is heterogeneous.

Front

What happens to water at 0 degrees Celsius?

Back

Water freezes at 0 degrees Celsius.

Front

What is the boiling point of water?

Back

The boiling point of water is 100 degrees Celsius at standard atmospheric pressure.