Physical and chemical changes

Select all of the physical changes. There are 3.

• adding color ie dye, marker, paint

• Gas, liquid, solid

• Cutting, crushing, tearing

• Spoiling, rusting, giving off heat, burning, getting cold, changing color

What state is the matter inside the balloon? Solid liquid or gas?

What can you do to the water to make it dissolve more quickly, other than stirring?

What chemical change process will feed the plant

• Respiration

• Caramelizing

• Photography

• Photosynthesis

knowing mass does not disappear, what will happen to the candle as it burns down? It changes into _____

• Smoke

• Oxygen

• Coal

• Water vapor

What happens to molecules in matter as they heat up?

• They dissolve

• They evaporate

• They move faster

If heat speeds up a chemical reaction, what temperature is the water of the brighter glow stick? Hot, cold, or room temp.?

How do I know a chemical reaction has occurred? Select 2 answers.

• Gives off a smell, substance turns cold

• It freezes into a solid after being put into the freezer

• Bubbles, smokes, gives off light

What happens in a chemical change? Choose 2 correct answers.

• Substances are mixed thoroughly until the particles look the same throughout and cannot be separated by filtering

• It changes into a new substance

• The molecular bonds break and atoms rearrange.

When you mix baking soda and vinegar, what are the reactants?

• Baking soda and vinegar

• Carbon dioxide