Chapter 1

Which are signs of a chemical change?

• change in state of matter

• energy change

• bubbles forming

• change in shape

• odor/smell change

characteristics you can see or find without changing the matter's identity.

• chemical properties

• physical changes

• physical properties

• predictions

A change in size, shape, or state of matter is a

• scientific law

• chemical property

• chemical change

• physical change

Check the physical properties

• density

• solubility

• flammability

• mass

• melting point

Characteristics you see as a form of matter changes into a different form of matter.

• chemical properties

• scientific theory

• chemical changes

• physical properties

Matter is-

• things that can maintain its state of matter

• anything that has mass & takes up space

• anything form of energy like heat or light

• only solid or liquid substances

Check those that are considered matter

• an oxygen atom

• light

• you

• heat from a fire

• water

Which offers an explanation for scientific observations or events?

• a hypothesis

• scientific law

• scientific theory

• data analysis

The best way to determine if a chemical change has occurred-

• the equation is balanced

• a new substance is formed

• a change in color & energy

• formation of bubbles

Particles touching & able to hold their shape are likely a

• solid

• liquid

• gas