7.1 Chemical Reactions

a substance or molecule that participates in a chemical reaction

• reactant

• product

• chemical energy

• endothermic reactions

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The smallest particle of an element; made of electrons, protons, and neutrons

• Atoms

• Elements

• Molecules

• Products

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NGSS.MS-PS1-1

The simplest unit of a chemical compound that can exist; formed when two or more atoms join together chemically

• Atom

• Compound

• Molecule

Physical and chemical characteristics of matter used to describe or identify a substance

• Chemical Reaction

• Properties

• Product

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NGSS.MS-PS1-2

_________ is (are) made of more than one atom.

• A molecule
• Protons
• Neutrons
• An element

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NGSS.MS-PS1-1

________ result(s) in no new substances.

• A physical change
• A chemical change
• Physical and chemical changes
• None of the above

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NGSS.MS-PS1-4

Which is an example of a physical change?

• Burning wood
• Freezing water
• Rust on a car
• Cooking food

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NGSS.5-PS1-4

Which is an example of a chemical change?

• Burning wood
• Rust on a car
• Cooking food
• All of the above

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms
• 10 atoms
• 1 atom
• 5 atoms

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Which of the following are properties of matter?

• Magnetism
• Color
• Odor
• All of the above

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NGSS.5-PS1-3