Unit Review 5.6

All matter can be observed and classified.

• True

• False

Answer explanation

The statement is true because all matter, which includes solids, liquids, gases, and plasma, can be observed through various methods and classified based on its properties, composition, and behavior.

Anything that takes up space.

• properties

• mass

• matter

• tools

Answer explanation

The correct answer is 'matter' because it is defined as anything that occupies space and has mass. Properties and tools do not encompass this definition, while mass refers specifically to the amount of matter.

Which tool is used to determine mass of an object?

• magnet

• scale

• circuit

• balance

Answer explanation

A balance is specifically designed to measure the mass of an object by comparing it to known masses. Unlike a scale, which measures weight, a balance provides a direct measurement of mass.

Which of the following is NOT a physical state of matter?

• gram

• solid

• liquid

• gas

Answer explanation

A gram is a unit of mass, not a physical state of matter. The physical states of matter are solid, liquid, and gas, which describe the form substances can take.

Mass is recorded in

• pounds

• ounces

• centimeters

• grams

Answer explanation

Mass is typically measured in grams, which is a metric unit. Pounds and ounces are units of weight, while centimeters measure length. Therefore, the correct answer is grams.

If it allows heat or electricity to flow it is a(n)

• conductor

• insulator

Answer explanation

A conductor is a material that allows heat or electricity to flow through it easily. In contrast, an insulator resists the flow of heat or electricity. Therefore, the correct answer is 'conductor'.

Whether or not a substance dissolves in water is called

• mass

• solubility

• magnetism

• physical state

Answer explanation

The ability of a substance to dissolve in water is referred to as its solubility. This term specifically describes how well a solute can mix with a solvent, in this case, water.

An object that sinks in water is ________ than water.

• less dense

• more dense

• the same density

Answer explanation

An object that sinks in water must be more dense than water. Density determines whether an object floats or sinks; if it is denser, it will sink.

If it does not allow electricity or heat to flow it is a(n)

• conductor

• insulator

Answer explanation

An insulator is a material that does not allow electricity or heat to flow through it. In contrast, a conductor facilitates the flow of electricity and heat. Therefore, the correct answer is insulator.

If an object floats in water it is _______ than water.

• more dense

• less dense

• the same density

Answer explanation

An object floats in water when it is less dense than water. This means that the object's density is lower, allowing it to displace enough water to support its weight, resulting in buoyancy.