Classroom Chemistry

When we combine two substances, we alway form a

• Mixture

• Solution

• Solute

• Solvent

The salt in saltwater is the __________.

• Solvent

• Solute

• Solution

• Mixture

On the pH scale, bleach is a(n)

• base

• acid

• neutral

• None of the above

When we put sugar in our coffee, we are adding a

• solute to a solution

• solvent to a solution

• solute to a solvent

• Solvent to a solute

A chemical reaction is...

• Reversible

• Irreversible

• A physical change

• All of the above

When salt mixes into waterm, it is...

• Concentrating

• Diluted

• Acidic

• Dissolving

All things are made of ________.

• blocks

• water

• matter

There are different type of atoms, these are called

• elements

• molecules

• hydrogen

• oxygen

Matter on Earth can exist as either:

• solid , liquid, or gas

• blocks, circles, or cubes

• liquid and solid only

• gas only

A chemical reaction has happened when....

• there is an odor

• the change is reversible

• an ice cube melts

• the appearance changes