Science Chemical & physical changers Flashcards

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1
Q

What is a chemical change?

A

Is a new substance is formed. It cannot change back into its original shape.

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2
Q

What is a physical change

A

No new substance is formed, it changes back to its original form. However propities may change.

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3
Q

What are the 4 signs of a chemical change

A

Colour change or temprature
A gas is givin off
A pereiritete forms
Energy is produced or formed

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4
Q

What is a sign of physical change

A

Change in shape/form expansion or conrtraction, change of state.

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5
Q

What is a reactant

A

The starting substance in a chemical reaction

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6
Q

What is the product

A

The new substances that are formed

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7
Q

What is a rearrangment

A

During a chemical reaction the atoms rearrange themselfs to form the products/sunstances.

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8
Q

What are the diffrences between liquids and solids

A

The main differences between soldis and liquids are that liquids have define volume but no define shape whereas solids have define shape and volume.

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