Understanding Chemical Properties and Reactions

How can a substance’s properties be measured?

• By observing its color and texture

• By measuring its mass, volume, and density

• By determining its taste and smell

• By examining how it reacts with light

Tags

NGSS.MS-PS3-4

What happens when a substance undergoes a chemical change?

• Its physical properties change

• New substances are formed with different properties

• It returns to its original state

• Its mass increases

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical property?

• Color

• Flammability

• Shape

• Volume

Tags

NGSS.MS-PS1-5

What does the Law of Conservation of Mass state?

• Mass can be created in a chemical reaction

• Mass is lost during a chemical reaction

• Mass is neither created nor destroyed during a chemical reaction

• Mass changes into energy during a reaction

Tags

NGSS.MS-PS1-5

What is the role of a coefficient in a chemical equation?

• It indicates the mass of a substance

• It shows how much energy is released in a reaction

• It balances the number of atoms on both sides of the equation

• It determines the color change of the reactants

Tags

NGSS.MS-PS1-5

What happens to the energy in an endothermic reaction?

• It is released as heat

• It is absorbed from the surroundings

• It is converted into light

• It stays the same

Tags

NGSS.MS-PS1-4

What is an example of a chemical change?

• Ice melting into water

• A paper burning

• Salt dissolving in water

• Water boiling

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Where does the energy in a chemical reaction come from?

• From the reactants' chemical potential energy

• From the products' chemical potential energy

• From the surroundings

• From the movement of atoms in the products

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The mass of substances involved in a chemical reaction always changes.

• True

• False

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

In an exothermic reaction, energy is absorbed from the surroundings.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4