Classifying Matter

What are the three states of matter?

• solid, liquid, and gas

• fast, slow, and medium

• hot, cold, and warm

• metal, wood, and plastic

Give an example of a solid.

• plastic

• water

• air

• wood

Give an example of a liquid.

• Sand

• Wood

• Iron

• Water

Give an example of a gas.

• Salt (NaCl)

• Water (H2O)

• Iron (Fe)

• Example: Oxygen (O2)

How can you classify matter based on its physical properties?

• Based on its location in the universe

• Based on its physical properties such as color, shape, size, density, texture, and state (solid, liquid, gas).

• Based on its chemical properties

• Based on its taste, smell, and sound

What is the difference between a mixture and a pure substance?

• The difference between a mixture and a pure substance is that a mixture is made up of two or more substances that are not chemically combined, while a pure substance is made up of only one type of substance.

• A mixture is always made up of elements, while a pure substance is always made up of compounds

• A mixture is always a liquid, while a pure substance can be a solid, liquid, or gas

• A mixture and a pure substance are the same thing

How can you separate a mixture of sand and water?

• Magnetism

• Evaporation

• Distillation

• Filtration

What is the difference between a physical change and a chemical change?

• A physical change and a chemical change both result in the formation of a new substance

• A physical change and a chemical change both occur at the atomic level

• The difference between a physical change and a chemical change is that a physical change does not result in the formation of a new substance, while a chemical change does.

• A physical change and a chemical change both involve changes in state of matter

Explain the concept of density and how it can be used to classify matter.

• Density is the measure of weight per unit volume of a substance. It can be used to classify matter by determining whether a substance is more or less heavy than another.

• Density is the measure of mass per unit volume of a substance. It can be used to classify matter by determining whether a substance is more or less dense than another.

• Density is the measure of volume per unit mass of a substance. It can be used to classify matter by determining whether a substance takes up more or less space than another.

• Density is the measure of temperature per unit volume of a substance. It can be used to classify matter by determining whether a substance is more or less hot than another.

Give an example of a heterogeneous mixture.

• Air

• Sugar water

• Milk

• Salad