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- 1. Multiple Choice
Which state of matter is most likely represented in the image?
Gas
Solid
Liquid
- 2. Multiple Choice
Which state of matter is most likely represented in the image?
Gas
Solid
Liquid
- 3. Multiple Choice
Which state of matter is most likely represented in the image?
Gas
Solid
Liquid
- 4. Multiple Choice
Cindy wrote the following phrase to describe the movement of particles in a state of matter.
"Tennis balls are neutral particles, far away from each other and moving at fast speeds."
Which state of matter did Cindy most likely describe?
Gas
Liquid
Plasma
Solid
- 5. Multiple Choice
Belinda wrote the following phrase to describe the movement of particles in a state of matter.
"Marbles glide past one another."
Which state of matter did Belinda most likely describe?
Gas
Liquid
Plasma
Solid
- 6. Multiple Choice
Alan wrote the following phrase to describe the movement of particles in a state of matter.
"Spheres jiggle together in a locked position."
Which state of matter did Alan most likely describe?
Gas
Liquid
Solid
Plasma
- 7. Multiple Choice
Dan wrote the following phrase to describe the movement of particles in a state of matter.
"Small pea seeds move around each other but do not bounce off."
Which state of matter did Dan most likely describe?
Gas
Plasma
Liquid
Solid
- 8. Multiple Choice
Polly did an experiment with marbles in a glass bowl to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown above:
What should Polly do to represent the particles of a solid?
Pack the bowl with marbles and then tap it gently.
Add two more marbles to the bowl and then shake it slowly.
Take out two marbles from the bowl and then shake it vigorously.
Add water to the bowl so that the marbles start sliding past one another.
- 9. Multiple Choice
A teacher did an experiment to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown above:
The teacher pulled the string attached to the stretched balloon, first slowly, then fast and finally vigorously. Which of the following is most likely correct about the pulling of the string and the corresponding state of matter being represented?
Gas is represented when pulled fast, solid when pulled slowly, liquid when pulled vigorously.
Gas is represented when pulled slowly, liquid when pulled fast, solid when pulled vigorously.
Solid is represented when pulled slowly, liquid when pulled fast, gas when pulled vigorously.
Solid is represented when pulled vigorously, liquid when pulled fast, gas when pulled slowly.
- 10. Multiple Choice
A teacher did an experiment to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown above:
The dryer speed can be adjusted at low, medium, and high to represent each state of matter. Which combination of the state of matter and the corresponding dryer speed is correct?
liquid = low; solid = medium; gas = high.
solid = low; liquid = medium; gas = high.
liquid = low; gas = medium; solid = high.
gas = low; liquid = medium; solid = high.
- 11. Multiple Choice
Sam did an experiment with ball bearings in a bottle to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown above:
What should Sam do to represent the movement of particles in liquids?
Leave all ball bearings in the bottle, and then shake the bottle slowly while the ball bearings remain in their spot.
Leave a few ball bearings in the bottle, and then shake the bottle vigorously so that the ball bearings hit one another and the sides of the bottle.
Remove half of the ball bearings, and then shake the bottle vigorously so the ones at the top hit one another.
Remove half of the ball bearings, and swirl the bottle so that the ball bearings remain in contact but can move around.
- 12. Multiple Choice
Which of the following represents a chemical change?
Mowing of grass
Sublimation of ice
Dissolving sugar in water
Charring of a marshmallow
- 13. Multiple Choice
Which of the following represents a chemical change?
Souring of milk
Melting of chocolate
Condensation of water
Breaking of an egg shell
- 14. Multiple Choice
If a chemical change has taken place, which of these is most likely true?
Original substance can be easily recovered.
Composition of a substance is the same.
A completely new substance is formed.
An easily reversible process has taken place.
- 15. Multiple Choice
Which of the following most likely happens during a physical change?
An irreversible process takes place.
Substance changes its form but not its molecular composition.
New atoms are introduced in the molecules of the substance.
A substance reacts differently with a chemical before and after the change.
- 16. Multiple Choice
Which of the following most likely happens during a chemical change?
No new substances are formed.
Properties of a substance remain unchanged.
Composition of a substance is same as before.
Different substances than before are produced.
- 17. Multiple Choice
Joshua observed the changes in a cake when it was baked in an oven. What best explains that he observed a chemical change?
He saw the rising batter form the cake in the oven.
He saw the cake expand outside the rim of the baking dish.
He noticed the flour and other ingredients lose their unique properties.
He noticed the steam from the moisture rise in the oven.
- 18. Multiple Choice
Over a period of time a student observed a small tadpole changing into a frog. Which of the following explains the physical change that takes place in this growing frog?
The frog can change back into a tadpole.
The tadpole changes its shape and form.
The frog is made up of a different set of elements than the tadpole.
Many reactions take place inside the tadpole as it changes into a frog.
- 19. Multiple Choice
A plant uses carbon dioxide and water to form food and oxygen. Why is this a chemical change?
The mass of the plant increases greatly.
The properties of water and food are same.
The plant increases in height as food is produced.
The properties of carbon dioxide and oxygen are different.
- 20. Multiple Choice
To make lemonade Erica dissolved 30 g of sugar in a certain amount of water. By what amount is the mass of water likely to increase after the sugar dissolves?
0 g
10 g
15 g
30 g
- 21. Multiple Choice
A cube of ice melts in a beaker to form 10 g of water. What is the best estimate of the mass of the ice cube?
2 g
5 g
10 g
15 g
- 22. Multiple Choice
Which of the following most likely causes the rate of a chemical reaction to increase?
Decreasing the reaction temperature
Slowing down the reacting molecules
Taking away heat from the reaction
Adding heat to the reaction
- 23. Multiple Choice
Which of the following most likely happens when thermal energy is removed from a chemical reaction?
Rate of reaction becomes faster
Fewer collisions occur between particles
The temperature of the reaction increases
Particles start moving at greater speeds than before
- 24. Multiple Choice
Which of the following most likely causes the particles in a chemical reaction to slow down?
Raising the thermal energy of the particles
Increasing the rate of the reaction
Lowering the temperature
Adding heat to the reaction
- 25. Multiple Choice
Which of the following most likely happens when the temperature of a chemical reaction is increased?
Molecules speed up
Molecules stop reacting
Reaction rate decreases
Chemical reaction stops
- 26. Multiple Choice
At which of the following temperatures is the chance of molecules aligning just right for a chemical change the highest?
50 °F
40 °F
30 °F
20 °F
- 27. Multiple Choice
Given two temperatures, 36 °F and 72 °F, which of the following correctly compares the number of opportunities for particles to align during a chemical reaction?
Same at both
Greater at 36 °F
Greater at 72 °F
Does not depend on temperature
- 28. Multiple Choice
Given two temperatures, 39 °F and 51 °F, which of the following correctly compares the number of chances for particles to bounce off each other during a chemical reaction?
Same at both
Lower at 39 °F
Lower at 51 °F
Does not depend on temperature
- 29. Multiple Choice
At which of the following temperatures is the speed of a given chemical reaction the fastest?
10 °F
20 °F
30 °F
40 °F
- 30. Multiple Choice
Which statement best describes the two substances?
Particles are closer together in solids so Substance B is a solid.
Particles are farther apart in solids so Substance A is a solid.
Particles are farther apart in gases so Substance B is a gas.
Particles are closer together in gases so Substance A is a gas.
- 31. Multiple Choice
Which statement best describes the two substances?
Particles collide in liquids so Substance Y is a liquid.
Particles collide in gas so Substance X is a gas.
Particles move around in liquids so Substance X is a liquid.
Particles move around in gas so Substance Y is a gas.
- 32. Multiple Choice
Which statement best describes the two substances?
Particles are closer together in solids, therefore Substance B is a solid.
Particles are farther apart in solids, therefore Substance A is a solid.
Particles are closer together in liquids, therefore Substance A is a liquid.
Particles are farther apart in liquids, therefore Substance B is a liquid.
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