Lesson 3.10 - Physical & Chemical Changes

Chemical vs Physical Properties

Multiple Choice

Is water melting a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is salt dissolving in water a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is digesting your food a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is a burning candle a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is melting iron a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is a car using fuel a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is bending copper wire a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is steam a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Are hard boiled eggs a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Is adding sugar to your coffee a physical or chemical change?

• Physical

• Chemical

Multiple Choice

Physical change or chemical change?

An iron nail rusting.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

Hydrogen peroxide can decompose into water and oxygen.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

Baking cookies.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

Wood burning.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

The Statue of Liberty made of copper turns green as it tarnishes.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

Chopping wood.

• physical change

• chemical change

Multiple Choice

Physical change or chemical change?

Frying an egg.

• physical change

• chemical change

Dropdown

A characteristic of a substance that can be observed or measured without changing the identity of the substance:​

Select answer

Dropdown

A substances potential to change based on its composition (flammable, caustic, reacts with water):​

Select answer

Categorize

Options (6)

Organize these options into the right categories

Physical change

Chemical change

Indicators of a Chemical Reaction

1. Change in Color

2. Change in Temperature

3. Production of a Gas (fizzing and foaming)

4. Formation of a precipitate

   1. (2 liquids react to make a solid)

5. Production of Light

6. A new substance with new properties is produced

Indicators of a Chemical Reaction

Multiple Choice

Which of the following describes a precipitate?

• a new liquid forms when a solid reactant is heated and melts

• a new solid product formed from two aqueous reactants

• a new gas forms when a solid is dissolved in a liquid

• bubbles form when two aqueous reactants are mixed

• a new solid forms when an aqueous reactant freezes

Multiple Choice

All of the following are indicators of a chemical reaction except one. Which one is NOT an indicator that a chemical reaction has taken place?

• the production of heat or light

• a color change

• the production of gas bubbles

• the dissolving of one substance in another

• an odor change

Multiple Choice

Evidence of a chemical reactions is anything that shows - 

• a new substance has formed

• a solid dissolved in a liquid

• interaction between 2 gases

• a change in the state of matter

Multiple Choice

Which of the following is a chemical change?

• water freezes to form ice

• sugar dissolves in water

• wood burns in a campfire

• a piece of metal expands when heated

Multiple Choice

a copper penny turning greenish after a few years.

• Chemical Change

• Physical Change

Multiple Choice

When two substances were combined, bubbles were produced and the temperature dropped.  This most likely means that:

• a chemical reaction took place

• the two substances had low boiling points

• one substance dissolved in the other

• the two substances are non-reactive

Multiple Choice

All of the following are indicators of a chemical reaction except one. Which one is NOT an indicator that a chemical reaction has taken place?

• the production of heat or light

• a color change

• the production of gas bubbles

• the dissolving of one substance in another

Multiple Choice

Which of the following would indicate a Chemical Change has occurred?

• Food left in the fridge too long started to produce an odor

• Dissolving sugar into your tea.

• Cutting an orange in half.

• Boiling water to cook some something later.

Multiple Choice

A student left milk in the fridge a month past the expiration date, when they pulled it out of the fridge they noticed the gallon plastic jug was blown up and under pressure from the inside. Did a physical or chemical change occur?

• physical
• chemical

Multiple Choice

How do you know that rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

Multiple Choice

True or False: All atoms are created or destroyed in a chemical reaction.

• true

• false

• maybe

Multiple Choice

Melting Cheese

• physical change

• chemical change

Multiple Choice

Burning Wood

• physical change

• chemical change

Multiple Choice

Milk Souring

• physical change

• chemical change

Multiple Choice

Wadding up Paper

• physical change

• chemical change

Multiple Choice

Bicycle Rusting

• physical change

• chemical change