Pre-Test Unit 2 - How Can I Smell Things From a Distance? [86330] (10/13/25) - Amber Morris | Library

1

An element is.....

1

An atom is.....

1

A molecule is.....

1

A substance is.....

1

A property is.....

1

If you could use a powerful microscope to see the particles in a gas, what would you see between the particles?

1

Which of the following is true about odors?

1

What happens to the molecules in a substance that changes from a liquid to a solid?

1

A ball made of an unknown substance is a solid at room temperature. A block made of a different substance is also a solid at room temperature. Their melting points would be

2

Oxygen, hydrogen, and water are substances. Which of these substances are elements?
[Select two.] Options:
A. Oxygen
B. Hydrogen
C. Water
D. None of These

1

Which is not a characteristic of all matter?

2

A middle school science class is studying metallic elements. The teacher provided each
student with a strip of metal. Pairs of students need to find out whether both students' strips are made of the same elements.

How would the students determine whether their strips are the same?

Write a claim naming at least two properties that could be used to determine whether the strips are the same. [Use a complete sentence(s).]

2

A middle school science class is studying metallic elements. The teacher provided each
student with a strip of metal. Pairs of students need to find out whether both students' strips are made of the same elements

How would the students determine whether their strips are the same?
Use the sentence frames below to provide evidence that supports your claim.
Describe the properties that could be used to determine whether the strips
are the same.

Evidence: (1st property) is (describe 1st property).
(2nd property) is (describe 2nd property).

2

Two jars contain substances that smell similar. Molecule A is in one jar and Molecule B is in
the other jar.

Question: How can the diagrams help you decide whether or not the two jars contain the same substance?

Task: Write a claim stating at least one way that you could use the diagrams to determine whether or not the two jars contain the same substance. [Use a complete sentence.]

2

Two jars contain substances that smell similar. Molecule A is in one jar and Molecule B is in
the other jar.

Question: How can the diagrams help you decide whether or not the two jars contain the same
substance?

Task: Use the sentence frame below to provide evidence for your claim, describing what the diagrams show that help you to determine whether or not the two jars contain the
same substance.

Evidence: The diagrams show ____________ which helps to determine whether or not the two jars contain the same substance.

2

Two jars contain substances that smell similar. Molecule A is in one jar and Molecule B is in
the other jar.

Question: How can the diagrams help you decide whether or not the two jars contain the same
substance?

Task: Use the sentence frame below to provide reasoning for how the evidence supports your claim. Explain how you could use the diagrams to determine whether or not the two jars contain the same substance.

Reasoning: The diagrams show which helps to determine whether or
not the two jars contain the same substance by/because .

1

In the following models, each small dot represents a wax molecule. Which model best represents what happens when solid wax melts?

1

A water molecule in the gas phase is _________________ a water molecule in the solid phase.

1

When ammonia at 24°C is cooled to 0°C, the ammonia molecules ________________________.

1

A pot of water on a hot stove begins to boil rapidly, and a cold glass lid is placed on the pot. Water droplets immediately begin forming on the inside of the lid. What happened?

1

Flask A contains an unknown gas. A student lets some of the gas escape by opening and closing the flask. Which of the following models best represents the gas that remains in the flask?

1

When a thermometer is heated, the red liquid inside the thermometer moves upward. This is because ___________.

1

Pre-Test Unit 2 - How Can I Smell Things From a Distance? [86330] (10/13/25)

An element is.....

An atom is.....

A molecule is.....

A substance is.....

A property is.....

If you could use a powerful microscope to see the particles in a gas, what would you see between the particles?

Which of the following is true about odors?

What happens to the molecules in a substance that changes from a liquid to a solid?

A ball made of an unknown substance is a solid at room temperature. A block made of a different substance is also a solid at room temperature. Their melting points would be

Oxygen, hydrogen, and water are substances. Which of these substances are elements? [Select two.] Options: A. OxygenB. HydrogenC. WaterD. None of These

Which is not a characteristic of all matter?

In the following models, each small dot represents a wax molecule. Which model best represents what happens when solid wax melts?

A water molecule in the gas phase is _________________ a water molecule in the solid phase.

When ammonia at 24°C is cooled to 0°C, the ammonia molecules ________________________.

A pot of water on a hot stove begins to boil rapidly, and a cold glass lid is placed on the pot. Water droplets immediately begin forming on the inside of the lid. What happened?

Flask A contains an unknown gas. A student lets some of the gas escape by opening and closing the flask. Which of the following models best represents the gas that remains in the flask?

When a thermometer is heated, the red liquid inside the thermometer moves upward. This is because ___________.

When you heat a sample of gas, what happens to the particles that make up the gas?

Oxygen, hydrogen, and water are substances. Which of these substances are elements?
[Select two.] Options:
A. Oxygen
B. Hydrogen
C. Water
D. None of These