You have a glass of water. Which of the following would cause the molecules of water to move faster?

Pouring the water into a heated pot.

Putting salt in the glass of water.

Placing the water in the freezer.

Emptying the water into a larger glass with water of the same temperature.

One of these statements does not describe what is happening in the picture. Which one is it?

The space between the particle stays the same.

The attractive force between the particles is decreasing.

STEEL WATER CARBON DIOXIDE GAS What would be the order of the 3 items above from the MOST to the LEAST ordered particle arrangement?

STEEL, WATER , CARBON DIOXIDE GAS

WATER, CARBON DIOXIDE GAS, STEEL

CARBON DIOXIDE GAS, STEEL, WATER

STEEL, CARBON DIOXIDE GAS, WATER

This is a cooling curve. As the temperature changes from a gas, to a liquid, then a solid, what else is true?

There is a decrease in kinetic energy and the molecules get closer together.

There is a decrease in molecular attraction and kinetic energy.

Kinetic energy increases while potential energy decreases during the phase changes.

Although the molecules get closer together, there is no real change in the energy of the molecules.

How should the model be changed to show the particles of a liquid at a lower temperature?

Decrease the velocities of the particles but maintain the space between the particles.

The particles should have positive and negative charges, and increase the space between the particles.

Separate the particles into positive and negative charges, but maintain the same space between the particles.

Increase the velocities of the particles, but increase the same space between the particles.

This is a mixture of sand and iron filings. How could you use physical properties of matter to separate the two substances?

Use a magnet to pull out the iron filings.

Add water to the mix to dissolve the sand.

Pick out the sand particles one by one.

Pour the mix through filter paper to separate them.

The Statue of Liberty is made of copper and the first image in 1886 has been enhanced to show what it looked like after being built. The second image is 132 years later in 2018. The green color is copper oxide caused by oxidation from oxygen in the air. What would be a chemical property of copper?

Copper has reactivity with oxygen causing the color change.

Copper is malleable. (you can flatten copper into a sheet)

While studying chemical and physical changes, students added salt to a glass of water. They stirred the salt until it dissolved and could no longer be seen. "That's a chemical change," a student stated. Do you agree? Explain.

No, it is a physical change. It is salt and water and you can get the salt back by boiling off the water.

Yes, it is a chemical change because something new is formed.

Yes, it is a chemical change because there was a change in the appearance of one of the components, the salt.

No, it is a physical change. A chemical change cannot occur when you mix two compounds together like salt, NaCl, and water, H 2 O, without adding heat.

First-Aid cold packs work by crushing a small vial inside the pack that releases the substance inside and the pack gets cold. What kind of reaction happens in the cold pack?

Chemical change; heat energy is released and the pack gets colder.

Physical change; the evidence is by a drop in temperature.

Chemical change; two different chemicals are mixed together.

Physical change; the substance in the vial dissolved in the pack's liquid.

Which of the following is NOT a sign of a chemical change?

Magnesium iodide dissolves in water.

Calcium chloride combined with sodium bicarbonate to produce bubbles.

Sodium metal reacts with chlorine gas to produce sodium chloride.

Hydrogen sulfide gas (H 2 S) is bubbled into a lead acetate solution and a precipitate forms.

A teacher got out the hot plate and put some sugar cubes in a pan. She began heating the sugar cubes the process is seen above. What can be said about this process?

Heating the sugar caused something new to form and a chemical change to occur.

Heating the sugar did not affect the solid sugar cubes.

Heating the solid sugar cubes caused evaporation and the sugar disappeared.

Heating the solid sugar cubes caused melting and a physical change to occur.

In sections B and D on the heating curve, what do you notice about the temperature?

The temperature remains the same.

Why is there never a temperature change during phase changes even though heat energy is added or can be taken away?

The heat energy added or removed is used to create or break bonds to form the next phase.

There is a temperature change during phases changes. It's just too subtle to detect with a thermometer.

Heat energy cannot be added or removed because that would violate the Law of Conservation of Mass.

Unit 4A-Matter

Quiz

•

Physics

•

9th Grade

•

Practice Problem

•

Easy

•

NGSS

MS-PS1-4, MS-PS1-2, MS-PS1-1

+4

Standards-aligned

Teresa Simmons

Used 25+ times

FREE Resource

38 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Glucose, C₆H₁₂O_6, is considered to be a(n) ____

element

compound

heterogeneous mixture

homogeneous mixture

Uranium, U , is considered to be a(n) _____

element

compound

heterogeneous mixture

homogenous mixture

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which particle model represents an element?

A

B

C

D

What type(s) of mixture is shown in the picture?

homogeneous mixture

heterogeneous mixture

colloid

suspension

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Table salt, NaCl, is a _____.

mixture

pure substance

suspension

colloid

Which of the following statements describes a difference between a mixture and a pure substance?

The density of a mixture can change with temperature, but the density of a pure substance cannot change.

The composition of a mixture can vary from sample to sample, but the composition of a pure substance is always the same.

A mixture has a specific melting point, while the melting point of a pure substance can vary.

A mixture tends to be homogeneous, while a pure substance tends to be heterogeneous.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which procedure correctly describes materials combining into a homogeneous mixture?

Sand and water are shaken in a container and left to separate into two substances

Olive oil is added to water

Salt is sprinkled on popcorn

Sugar is add to water

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Unit 4A-Matter

38 questions

Glucose, C₆H₁₂O_6, is considered to be a(n) ____

Uranium, U , is considered to be a(n) _____

Which particle model represents an element?

What type(s) of mixture is shown in the picture?

Table salt, NaCl, is a _____.

Which of the following statements describes a difference between a mixture and a pure substance?

Which procedure correctly describes materials combining into a homogeneous mixture?

Which phase change absorbs heat energy (endothermic)?

Which is a phase change that releases heat (exothermic)?

What phase change is represented by letter C?

Access all questions and much more by creating a free account

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Unit 4A-Matter

38 questions

Glucose, C6H12O6, is considered to be a(n) ____

Uranium, U , is considered to be a(n) _____

Which particle model represents an element?

What type(s) of mixture is shown in the picture?

Table salt, NaCl, is a _____.

Which of the following statements describes a difference between a mixture and a pure substance?

Which procedure correctly describes materials combining into a homogeneous mixture?

Which phase change absorbs heat energy (endothermic)?

Which is a phase change that releases heat (exothermic)?

What phase change is represented by letter C?

Access all questions and much more by creating a free account

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Glucose, C₆H₁₂O_6, is considered to be a(n) ____