What is the definition of a physical change?

Alteration in the physical state of matter without changing its chemical composition

Inherent characteristics that help us identify and describe matter

Characteristics that describe how a substance behaves under different conditions

Transformation that results in the creation of new substances

What is the definition of chemical changes?

changes that lead to the formation of new substances with different chemical properties

characteristics that describe how a substance interacts with other substances

changes that describe how a substance behaves under different conditions

changes that alter the form or appearance of a substance, but not its chemical composition

What happens to the fundamental particles during a physical change ?

They break and form new chemical bonds

They become completely different substances

What happens to the fundamental particles during a chemical change ?

They break and form new chemical bonds

They become completely different substances

The Statue of Liberty is made of copper that has turned green because it has undergone a change. What can be said about this change?

The change is not a physical change because a new chemical is formed on the outside of the statue.

The change is a physical change because the copper in the statue is still there.

The change is a physical change because a new chemical is formed on the outside of the statue.

The change is a physical change because the color of the statue has changed.

A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?

exposing it to a flame to see if it catches on fire

heating it to find the temperature at which it melts

hitting it with a hammer to determine if it breaks or bends

placing it in water to find out whether or not it dissolves

In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom. He plans to heat the beaker over low heat and make more observations.

A chemical change occurred, so even if Cash heats it, the white solid will remain.

A physical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.

A physical change occurred, so even if Cash heats it, the white solid will remain.

A chemical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

The powder DISSOLVED in the water

The water turned the COLOR yellow

Which of the following is a correct description of a chemical change?

The change results in the formation of new substances.

The change only affects the appearance of a substance.

The substance remains the same.

Only the color of the substance changes.

What is the law of conservation of mass?

Mass remains the same before and after a reaction.

Mass is always lost in a chemical reaction.

Mass is gained after a chemical reaction.

Mass only changes if heat is added.

What is a balanced chemical equation?

When there is the same number of atoms of each element on both sides of the equation

When only reactants are on the left side

When the masses of reactants are higher than products

When there is one product and one reactant

In a chemical reaction, what is represented by the arrow symbol?

It means 'yields' or 'produces.'

It shows that products are to the left of the arrow.

It separates elements from compounds.

It shows that mass will increase.

Which statement is true about atoms in a chemical reaction?

Atoms are rearranged but their number stays the same.

Some atoms are destroyed during the reaction.

Atoms only change in number when a reaction is balanced.

Atoms disappear when new substances are formed.

How is mass affected when bonds break and reform in a chemical reaction?

Mass only changes if a gas is produced

Which best describes the concept of a 'reactant'?

A substance that undergoes a chemical reaction

A substance that is produced by a chemical reaction

A molecule that does not change during a reaction

A compound that exists only in physical changes

Which of the following would NOT necessarily be considered evidence of a chemical change?

one or more substances change state (liquid to gas, etc)

a mixture bubbles and foams without a heat source

a mixture becomes hot without a heat source

Which of the following is an example of an exothermic reaction?

all of the examples given are correct

POST-TEST PS 1-2: Matter and its Interactions

Authored by Jorie Ganek

Science

7th Grade

NGSS covered

Used 8+ times

POST-TEST PS 1-2: Matter and its Interactions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Reactivity (bubbling, fizzing) is a --- property.

Chemical

Physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Physical properties are

properties that can be observed without changing the identity of the substance

properties that describe how a substance changes into a completely different substance

properties that we can only observe with our eyes

properties that we need special tools to observe

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which is an example of a chemical change?

melting ice to make water

baking cake batter to make a cake

putting cheese on bread to make a cheese sandwich

cutting an orange into slices for a snack

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Burning a marshmallow over a campfire

Physical

Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

______________________ can only be recognized when substances react or do not react chemically with one another.

Physical properties

Chemical properties

Flammable properties

Colorful properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

A characteristic that can be determined without changing the chemical identity of a substance is a ________ property.

Chemical

Physical

Intensive

Material

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Melting point

Density

Color

Ability to react with acid

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POST-TEST PS 1-2: Matter and its Interactions

Reactivity (bubbling, fizzing) is a --- property.

Physical properties are

Which is an example of a chemical change?

Burning a marshmallow over a campfire

______________________ can only be recognized when substances react or do not react chemically with one another.

A characteristic that can be determined without changing the chemical identity of a substance is a ________ property.

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

What is the definition of a physical change?

What is the definition of chemical changes?

What happens to the fundamental particles during a physical change?

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