Chemical Reactions	Physical Changes	Name that change!	More name that change!	Chemical vs. Physical!!
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Final Question

Why is the sky blue?

Why is the sky blue?

True

Name two chemical reactions.

Answers may vary.

During a chemical reaction there can be an unexpected change in . . .?

Color, temperature, or state of matter.

When is color change considered a chemical reaction?

When it is unexpected.

Mixing vinegar and baking soda is considered a chemical reaction because why?

It produces a new substance, a gas. Carbon dioxide.

When paper is torn, it is a physical change because why?

It does not create a new substance, the pieces are still paper.

Name two physical changes.

Answers may vary.

Why is melting a physical change?

It does not create a new substance.

Rust is a physical change. True or false?

False.

Explain what a physical change is.

A change that may cause the substance to look differently in size or shape, but does not create a new substance or unexpected change.

Chocolate melting.

Physical change

Mixing vinegar and baking soda.

Chemical reaction.

A light bulb being turned on.

Physical change.

Eating a doughnut

Chemical reaction.

Breaking a glass.

physical change.

Roasting a marshmallow.

Chemical reaction.

Lighting a match.

Chemical reaction.

Molding a piece of clay to make a sculpture.

Physical change.

Tearing up a piece of cloth.

Physical change.

Heating iron to make steel.

Chemical reaction.

Firing clay in a kiln to make pottery.

Chemical reaction

Making popsicles.

Physical change

Sanding a piece of wood to build a shelf.

Physical change.

Mixing a green liquid and a yellow liquid to create a pink solid.

Chemical reaction.

Mixing two substances and having them produce heat.

Chemical reaction.

What is a quick test to see if a change is a physical one or a chemical reaction?

Is something completely new and different produced, or is the substance still the same, but with a different appearance.

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