8th Grade Final Exam - Multiple Choice

One example of a physical change is

• burning paper.

• baking cookies.

• heating table sugar.

• dissolving salt in water.

One example of a chemical change is

• filtering.

• burning wood.

• boiling water.

• crushing a can.

The energy of matter in motion is called

• kinetic energy.

• potential energy.

• chemical energy.

• electromagnetic energy.

Radio waves, visible light from the sun, infrared “rays” from heat lamps, the waves that heat food in a microwave oven, ultraviolet rays, and X-rays are all considered types of

• electrical energy.

• electromagnetic energy.

• chemical energy.

• potential energy.

Table sugar and table salt are examples of

• atoms.

• elements.

• mixtures.

• pure substances.

Substances that CANNOT be broken down chemically into other substances are

• elements.

• compounds.

• mixtures.

• solutions.

The measurement of the force of gravity on an object is the object’s

• mass.

• volume.

• weight.

• density.

The measurement of how much matter an object contains is its

• volume.

• weight.

• mass.

• melting point.

The measurement of how much mass is contained in a given volume is called

• weight.

• melting point.

• boiling point.

• density.

All elements are composed of extremely small particles called

• compounds.

• mixtures.

• atoms.

• molecules.