Unit 1 review atom, element, compound, physical/chemical

A physical change is

• a change where the characteristics do not change the substance

• a change where the characteristics do change the substance

• a change where the chemistry changes

What is the definition of chemical change?

• any change that results in the formation of one (or more) new chemical substance(s)

• changing of only the appearance of the object

• matter cannot be created or destroyed, only change form

• changes affecting the form of a chemical substance, but not its chemical composition

Which of the following are examples of chemical changes? Select all that apply!

• Iron Rusting

• Gas Burning

• Breaking a Glass

• Boiling Water

• Burning Wood

Sugar dissolving in water is a

• Chemical Change

• Physical Change

Which of the following is NOT an indicator of chemical changes?

• Unexpected color change

• Dissolving

• Light production

• Gas formation

Select ALL the characteristics of a physical change.

• changes in appearance only

• a new substance is not created

• changes the pH level

• chemical bonds are not created or broken

• burning and fire

What are the basic building blocks for all matter?

• atoms
• elements
• compounds
• chemicals

What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

All ____________ are made up of two or more atoms bonded together.

• atoms

• molecules

• mixtures

• matter

What do we call a chemical substance made up of 2 or more different types atoms bonded together?

• formula
• atom
• subscript
• compound