Chemistry Chapter 2, 3, and 4 Review

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

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

Tags

NGSS.MS-PS1-2

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Change in color is a physical change.

• True
• False

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A mixture is the result of a physical change because...

• The parts can be physically separated

• A new substance is made

• There is a chemical reaction

• One part of the mixture disappears

How close a set of measurements are to each other...

• accuracy

• precision

• % error

• luminous intensity

How close a measurement is to the accepted value...

• accuracy

• precision

• electric current

• adaptability

Which of the following would best describe a situation where all measurements of a 1 gram object were off by exactly 15 grams?

• high accuracy, high precision

• low accuracy, high precision

• high accuracy, low precision

• low accuracy, low precision