7.6a

Which statement does NOT indicate a physical change?

• A student cuts open an apple and removes the core

• The apple dries out into hard, crispy pieces

• The apple appears brown in color after being cut into smaller pieces

• A student peels the apple and chops it into smaller pieces

• A

• B

• C

• D

Tags

NGSS.MS-PS1-5

• F

• G

• H

• J

Tags

NGSS.MS-PS1-2

• F

• G

• H

• J

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

• 19.87

• 21.97

• 35.96

• 49.97

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2

• F

• G

• H

• J

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The student concluded that a chemical change had occurred.  Which of the following observations provides the least support for this student’s conclusion?

• The temperature of the combined solutions increased.

• The clear solution was poured into the blue solution.

• A gas formed and bubbled out of the final solution.

• The color of the solutions changed after they were mixed.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Iron is an element that can chemically react with other substances.  When iron reacts with oxygen, rust is produced.  Which observation supports the conclusion that a chemical reaction has occurred between iron and oxygen?

• Iron is a metallic element.

• A new substance is formed.

• Oxygen is in the form of a gas.

• None of these.

Tags

NGSS.MS-PS1-2

How many atoms are represented in the products of the chemical equation?

• 6

• 9

• 12

• 15

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5