Chemical changes

Chemical changes in Matter

We will be examining what are chemical changes and the Law of Conservation of Mass

Multiple Choice

Identify what type of change happening in the picture below...

• Chemical Reaction

• Physical Change

• Change in State

• Change in appearance only

Multiple Choice

Identify what type of change happening in the picture below...

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction

Multiple Choice

The difference between a Physical change and a Chemical change is…

• Physical change is only a change to the outside appearance.

• Chemical change is when matter is changed into something new.

• Atoms are rearranged in chemical changes & not in physical.

• All are correct.

Multiple Choice

When you break a cracker into pieces it is a...

• Chemical change
• Physical change

Multiple Choice

Which of these is a result of a chemical change?

• A mixture
• A solution
• A new substance
• Melting or freezing

Multiple Choice

Chemical or Physical?  Glass breaking into tiny shards

• Chemical Change
• Physical Change

Multiple Choice

An object undergoes a chemical change when it changes:

• shape, form, state of matter

• melting, odor, size

• color, burning, rusting

Multiple Choice

Which of these is NOT an indicator of a chemical change?

• a change in color
• giving off or taking in of heat
• the release of gases
• a change in shape

Multiple Choice

In a chemical change,  particles that make up two or more substances are rearranged to ___

• form a mixture
• form a new substance
• mix into a solid
• mix into a solution

Multiple Choice

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Multiple Choice

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

Multiple Choice

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Multiple Choice

Which Law states that Matter cannot be created or destroyed during a Chemical Change/Reaction?

• Conservation of Energy
• Conservation of Matter (Mass)
• Conservation of Momentum
• Conservation of Thermodynamics

Multiple Choice

When tearing a piece of paper, the mass will __________ because of the law of conservation of mass.

• increase

• decrease

• stay the same

Multiple Choice

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

Poll

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