Exploring Chemical and Physical Changes

What are the two main types of reactions discussed in the video?

• Nuclear and Physical

• Chemical and Biological

• Physical and Chemical

• Biological and Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a physical reaction, what remains unchanged?

• The shape of the substance

• The phase of the substance

• The color of the substance

• The properties of the substance

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NGSS.MS-PS1-4

Which of the following is an example of a physical reaction?

• Burning a matchstick

• Rusting of iron

• Melting of an ice cube

• Bursting of firecrackers

In a physical reaction, what can change?

• The molecular structure

• The properties of the substance

• The chemical composition

• The shape or phase of the substance

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What happens at the molecular level during a chemical reaction?

• The molecules change shape

• New substances are formed

• The molecules remain the same

• The molecules change color

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is NOT a chemical reaction?

• Burning of a matchstick

• Rusting of iron

• Melting of an ice cube

• Bursting of firecrackers

Tags

NGSS.MS-PS1-2

What is common among burning a matchstick, rusting of iron, and bursting firecrackers?

• They all involve a change in state

• They all produce new substances

• They all involve a change in color

• They all are physical reactions

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main difference between physical and chemical reactions?

• Physical reactions involve a change in color, chemical reactions do not

• Physical reactions produce new substances, chemical reactions do not

• Chemical reactions involve a change in state, physical reactions do not

• Chemical reactions produce new substances, physical reactions do not