Chemical and Physical Changes

How long is the pencil in inches?

• 4 cm

• 4 in

• 8 cm

• 8 in

What kind of graph is pictured above?

• Bar Graph

• Line Plot

• Pie Chart

• Scatter Plot

____________________ occurs when a liquid's particles slow down and the substance

• Boiling

• Evaporating

• Freezing

• Melting

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Based on the thermometer, what is the temperature of this mixture in Fahrenheit (F)?

•   -4°C

• -10°C

• 20°F

• 25°F

Tags

NGSS.MS-PS1-4

________________ occurs when a solid's particles speed up and the substance changes to a liquid.

• Boiling

• Evaporating

• Freezing

• Melting

Tags

NGSS.MS-PS1-4

Using the graph, which object weighed the most?

• Bag of Potatoes

• Box of Butter

• Brick

• Carton of Milk

What do you call the combining of two or more different substances?

• Mixture

• Solution

• Substance

• Volume

  What defines a chemical change?

• A characteristic of matter that is not associated with a change in its chemical composition.

• Density, hardness

• The breaking or forming of bonds between molecules or atoms, making at least one new substance.

• The material involved in the change is structurally the same before and after the change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Think about when you melt butter, is this a chemical or physical change? How does the state of matter change?

• Chemical change; Solid to liquid

• Physical change; Liquid to solid

• Chemical change; Liquid to solid

• Physical change; Solid to liquid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Think about a bike that has rusted over time, is this a chemical or physical change? Explain in depth why or why not. Tell me in at least 3 sentences and explain the change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5