Why is the sky blue?
Name two chemical reactions.
During a chemical reaction there can be an unexpected change in . . .?
When is color change considered a chemical reaction?
Mixing vinegar and baking soda is considered a chemical reaction because why?
When paper is torn, it is a physical change because why?
Name two physical changes.
Why is melting a physical change?
Rust is a physical change. True or false?
Explain what a physical change is.
Chocolate melting.
Mixing vinegar and baking soda.
A light bulb being turned on.
Eating a doughnut
Breaking a glass.
Roasting a marshmallow.
Lighting a match.
Molding a piece of clay to make a sculpture.
Tearing up a piece of cloth.
Heating iron to make steel.
Firing clay in a kiln to make pottery.
Making popsicles.
Sanding a piece of wood to build a shelf.
Mixing a green liquid and a yellow liquid to create a pink solid.
Mixing two substances and having them produce heat.
True
Answers may vary.
Color, temperature, or state of matter.
When it is unexpected.
It produces a new substance, a gas. Carbon dioxide.
It does not create a new substance, the pieces are still paper.
Answers may vary.
It does not create a new substance.
False.
A change that may cause the substance to look differently in size or shape, but does not create a new substance or unexpected change.
Physical change
Chemical reaction.
Physical change.
Chemical reaction.
physical change.
Chemical reaction.
Chemical reaction.
Physical change.
Physical change.
Chemical reaction.
Chemical reaction
Physical change
Physical change.
Chemical reaction.
Chemical reaction.
