Properties & Changes, Factors affecting chemical reactions

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties

Tags

NGSS.MS-PS1-2

Properties that can be observed without changing the identity of the substance.

• Physical
• Chemical

Tags

NGSS.5-PS1-3

Example for physical property

• odor
• burns in air
• reacts with water to create hydrogen gas
• rust

Tags

NGSS.MS-PS1-2

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

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

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Tags

NGSS.MS-PS1-2

Change in density is a physical change.

• True
• False

Flammability is an example of what property?

• Chemical property
• Physical property

Tags

NGSS.MS-PS1-2

An ice cream cone melts in a kid's hand while walking outside on a hot summer day. What is this an example of?

• Physical property

• Chemical property

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-4

A silver ring gets tarnished (becomes dull) as a result of being exposed to air and moisture. What is this an example of?

• Physical property

• Chemical property

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-2

Water boils at 100˚C. What is this an example of?

• Physical property

• Chemical property

• Physical change

• Chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4