Physical & Chemical Changes Pre Assessment

If we have any substance, it can be concluded that a chemical change has happened if–

• There is a color change.

• The state of matter changes.

• There is a decrease in mass.

• The matter is stirred thoroughly.

Which of the following would indicate the formation of a new substance?

• A liquid turns to a solid.

• A sample of metal melts.

• Bubbles and fizzing occur.

• A solid dissolves in a liquid.

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

• An explosion

• A solid stays a solid

• A piece of paper is crumpled

• Two liquids are mixed and it warms up

When two liquids are mixed, the container feels colder to the touch. This is evidence of what?

• A physical change

• A chemical change

• A state of matter change

• No change

When two liquids are mixed, the color and temperature stay the same. This is evidence of what?

• A physical change

• A chemical change

• A state of matter change

• No change