This is the scientific law that states that matter cannot be created or destroyed.

law of conservation of elements

How do you know when chemical reaction is happening?

Atoms in the reactants break apart and regroup to make one or more new products.

Atoms remain in the same place and position in both a reactant and a product

Atoms in products break apart and regroup to make one or more new reactants.

Chemical reactions are only visual. If can't see it, it hasn't happened.

What happens to the mass of the reactants and products during a chemical reaction?

The mass of the reactant is always the same as the mass of the product.

The mass of the reactant is always higher than the mass of the product

The mass of the reactant is always lower than the mass of the product.

What does the coefficient tell us (number to the left of the chemical formula)?

How many molecules of a particular substance there are.

How many molecules there are in the reactant.

How many molecules there are in the product.

How many atoms there are in a molecule.

If I eat something, my stomach helps a chemical reaction occur. What happens to the mass of the products after I have eaten them compared to the mass of the products before I ate them?

The mass of the food digested is the smae as the mass of the food before I ate it.

The mass of the food digested is more than the mass of the food before I ate it.

The mass of the food digested is less than the mass of the food before I ate it.

Select all true statement about writing chemical equations.

the reactants on the left side of the equation

the products on the right side of the equation

An arrow separates the reactants and the products

A whole number to the left of a formula tells how many molecules of that substance are involved in the reaction.

Chemical reactions

Quiz

•

Science

•

6th - 8th Grade

•

Practice Problem

•

Medium

•

NGSS

MS-PS1-2, MS-PS1-5, MS-PS1-4

+1

Standards-aligned

Amanda Mitchell

Used 187+ times

FREE Resource

24 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Reactants will have different _________________ than the products

chemical reactions

properties

melting/boiling point, density, solubility

mixing, heating, cooling

Tags

NGSS.MS-PS1-2

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Products will have different properties than the ….

reactants

a chemical reaction has happened

before and after

properties

Tags

NGSS.MS-PS1-2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

One or more substances form from one or more other substances during a..

mixing, cooling, heating

product

reactant

chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Properties must be tested and _ to confirm that a chemical reaction has taken place

before and after

melting/boiling point during the reaction

during data collected

Tags

NGSS.MS-PS1-2

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What conditions will help cause a substance to undergo a chemical reaction

density

mixing, heating, cooling

melting/boiling point

Tags

NGSS.MS-PS1-2

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Striking a match on the box is an example of what type of condition?

heating

cooling

mixing

Tags

NGSS.MS-PS1-4

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Some chemical reactions happen as soon as two chemicals are …

measured

found

mixed

weighted

Tags

NGSS.MS-PS1-2

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Chemical reactions

24 questions

Reactants will have different _________________ than the products

Products will have different properties than the ….

One or more substances form from one or more other substances during a..

Properties must be tested and _ to confirm that a chemical reaction has taken place

What conditions will help cause a substance to undergo a chemical reaction

Striking a match on the box is an example of what type of condition?

Some chemical reactions happen as soon as two chemicals are …

To confirm that a chemical reaction has taken place, you must test ___________ before and after

If there is no change in the product then there was no …

A substance that exists before a chemical reaction takes place and changes as a result of the reaction is called a

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Popular Resources on Wayground

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Chemical reactions

24 questions

Reactants will have different _________________ than the products

Products will have different properties than the ….

One or more substances form from one or more other substances during a..

Properties must be tested ________ and _________ to confirm that a chemical reaction has taken place

What conditions will help cause a substance to undergo a chemical reaction

Striking a match on the box is an example of what type of condition?

Some chemical reactions happen as soon as two chemicals are …

To confirm that a chemical reaction has taken place, you must test ___________ before and after

If there is no change in the product then there was no …

A substance that exists before a chemical reaction takes place and changes as a result of the reaction is called a

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Properties must be tested and _ to confirm that a chemical reaction has taken place