Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

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NGSS.MS-PS3-5

Front

How many atoms of carbon are in C6H12O6?

Back

There are 6 atoms of carbon in C6H12O6.

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NGSS.MS-PS1-1

Front

In a chemical reaction, if you start with 23 atoms, how many atoms will remain after the reaction?

Back

You will still have 23 atoms remaining after the reaction.

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NGSS.MS-PS1-5

Front

If the mass of the reactants is 18g, what is the mass of the products?

Back

The mass of the products will also be 18g, according to the law of conservation of mass.

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NGSS.MS-PS1-5

Front

What are fizzing, foaming, and burning examples of?

Back

These are examples of chemical changes.

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NGSS.MS-PS1-2

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

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NGSS.MS-PS1-1

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

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NGSS.MS-PS1-1

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.