Matter

Which is an example of a chemical change?

• paper being burned

• metal being melted

• a board being cut in half

• water being boiled

What happens when a piece of wood burns?

• a physical change takes place

• a chemical change takes place

• the wood loses its gravity

• the wood loses its inertia

Which of these represents a chemical change?

• burning gas

• opening a can of soup

• chopping vegetables

• pouring ingredients into a pot

Baylee is completing an investigation. She could conclude a chemical change is taking place if which o the following occurs?

• the size gets smaller

• a new substance forms

• the state of matter changes

• the shape becomes different

Haley investigated chemical & physical changes using eggs. She did the following 4 actions to 4 different eggs. boiled, cracked, fried, & scrambled. Which action describes a physical change?

• boiled

• fried

• cracked

• scrambled

In making a pizza, which process involves a chemical change?

• mixed spices for the sauce

• slicing pepperoni for the topping

• spreading cheese on the pizza

• baking the dough to form the crust

Which of the following is an example of a chemical change?

• burning a scented candle

• cutting an apple into slices

• freezing liquid water into an ice cube

• melting a stick of butter to pour over popcorn

Which of the following examples is evidence of a physical change?

• ice cream melts in a bowl

• a silver spoon tarnishes over time

• an electrical current splits water into hydrogen & oxygen

• a person inhales oxygen & exhales carbon dioxide & water

In operating a car, which 2 processes involve chemical changes?

• charging a battery & igniting gasoline

• inflating tires & adding oil

• shifting gears & pumping brakes

• turning the steering wheel & adjusting the lights

Which of the following forms of energy is released or absorbed in most chemical reactions?

• light energy

• electrical energy

• sound energy

• heat energy