Intro to Chemistry

Chemistry is the study of

• the universe

• chemicals

• matter

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Matter is defined as

• any substance that takes up space

• any substance that contains atoms/molecules

• both answers are correct

An example of a physical property is

• the ability to rust

• bubbling or fizzing

• decay or rotting

• texture/how something feels

Which of these statements best describes a chemical property of a substance?

• it fizzes when mixed with acid

• it is blue

• it is a fine powder

• it has a mass of 13 grams

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NGSS.MS-PS1-2

When water is mixed with a green powder, it heats up and gas forms. This describes a

• physical Change

• chemical Change

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A broken window is an example of

• a physical change

• a chemical change

The chemical formula for vinegar is C₂H₄O₂

• Vinegar is an element

• Vinegar is a compound

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Elements

• are made of 2 or more different types of atoms

• cannot be accurately counted - there are too many of them

• are made of the same type of atoms, there are 118 that have been identified

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The formation of a solid when two liquids combine is called?

• condensation

• freezing

• precipitate

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NGSS.MS-PS1-2

Identify the type of change happening in the picture as the two liquids combine...

• chemical change

• physical change

• change in appearance only

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