Physical/ Chemical and Conservation of Mass (1.2)

Physical Changes are changes in

• size

• shape

• state of matter

• all of these

Which of the following is a physical property?

• color

• flammability

• reactivity

• toxicity

A change in chemical composition

• is a chemical change that brings a new substance

• is a physical change that brings a new substance

• is a chemical reaction that changes nothing

• is a physical reaction that changes nothing

Signs of a chemical change might be

• color change

• production of gas and light

• rust

• all of these

Density is a property of matter that determines

• if a substance will dissolve

• if a substance is flammable

• if a substance will sink or float

• if a substance is toxic

Solubility is the property of a substance to

• float

• dissolve in a liquid

• react with oxygen

• change color

Physical or chemical change?

An iron bucket reacting with water and oxygen to form rust.

• physical

• chemical

• neither one

Physical or chemical change?

A porcelain bowl breaking.

• Physical

• chemical

• neither one

Physical or chemical?

A substance melting and changing from solid to liquid.

• physical

• chemical

• neither one

Physical or chemical?

Sorting rocks by size, shape, and color.

• physical

• chemical

• neither one