What are Chemical Reactions?

A process in which atoms rearrange to form new substances.

Letter and numbers showing the types and number of atoms.

What is the role of a catalyst in a chemical reaction?

C) It speeds up the reaction without being consumed.

B) It increases the activation energy required.

D) It changes the products of the reaction.

Which of the following is an example of a catalyst in a chemical reaction?

B) Enzymes in biological processes

A) Water in a hydration reaction

C) Salt in a precipitation reaction

In the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O}@@, what would happen if a catalyst is added?

B) The reaction would occur faster.

A) The reaction would produce more water.

C) The reaction would require more energy.

How does temperature affect the rate of a chemical reaction?

B) Increasing temperature generally increases the reaction rate.

A) Increasing temperature generally decreases the reaction rate.

C) Temperature has no effect on reaction rate.

D) Temperature changes the products of the reaction.

What is the effect of increasing the concentration of reactants on the rate of a chemical reaction?

B) It increases the reaction rate.

A) It decreases the reaction rate.

C) It has no effect on the reaction rate.

D) It changes the products of the reaction.

Which of the following statements is true about enzymes?

B) Enzymes decrease the activation energy of reactions.

A) Enzymes are consumed in the reactions they catalyze.

C) Enzymes increase the activation energy of reactions.

D) Enzymes change the equilibrium position of reactions.

Amplify Chemical Reactions

Authored by Lisa Thompson

Science

8th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Damian mixed two samples together shown above and found two products, only one is shown above. Which of the following could be the two samples he mixed together?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Marisol mixed two samples together shown above and found two products, only one is shown above. Which of the following could be the two samples he mixed together?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A chemist mixed two samples together with properties shown above. One of the ending substances was a pink liquid. This ending substance is made up of the repeating group of atoms shown. Which of the following could be the samples for the reactants?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Serena mixed 2 samples. She analyzed the results and found two ending substances. One of the ending substances was a white solid. Which of the diagrams shows the repeating groups of atoms that make up the samples Serena mixed together?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

DRAG AND DROP QUESTION

1 min • 2 pts

Bubbles form when two or more substances are combined is a (a)

Chemical Change

Physical Change

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Based on the diagram, what is the function of anhydrous calcium chloride in the experiment?

To absorb water vapour so that dry hydrogen will be produced

To supply hydrogen gas

To separate the metals

To release heat for combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

DRAG AND DROP QUESTION

1 min • 2 pts

Bubbles form when two or more substances are combined is a (a) (b)

Chemical Change

Physical Change

Tags

NGSS.MS-PS1-2

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Amplify Chemical Reactions

Damian mixed two samples together shown above and found two products, only one is shown above. Which of the following could be the two samples he mixed together?

Marisol mixed two samples together shown above and found two products, only one is shown above. Which of the following could be the two samples he mixed together?

A chemist mixed two samples together with properties shown above. One of the ending substances was a pink liquid. This ending substance is made up of the repeating group of atoms shown. Which of the following could be the samples for the reactants?

Serena mixed 2 samples. She analyzed the results and found two ending substances. One of the ending substances was a white solid. Which of the diagrams shows the repeating groups of atoms that make up the samples Serena mixed together?

Bubbles form when two or more substances are combined is a (a)

Based on the diagram, what is the function of anhydrous calcium chloride in the experiment?

Bubbles form when two or more substances are combined is a (a) (b)

The substances at the beginning of a chemical equation are called the ____

Tiahna mixed two solid substances together in a sealed container. After mixing, Tiana found two liquid substances in the sealed container. (Nothing had escaped.) Which of the repeating groups of atoms could make up the ending substances?

Santiago mixed two powdery substances together. After mixing, Santiago found two liquid substances in the sealed container. Which of the following could be the two product substances?

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