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- 1. Multiple Choice
A steel ball is placed at position A on the curved, hard surface shown below. The surface is fixed to the table on which it sits so that it does not move. The ball is held at rest at position A and then released. It rolls smoothly along the surface. Which choice below most nearly describes the greatest height attained by the ball on the other side of the curve?
Slightly higher than position B
Almost to position B
Almost to position C
Significantly below position C
It will not get over the hill in the middle
- 2. Multiple Choice
You have a can of soda that you would like to keep cold and a sandwich to keep warm. You have woolen blankets and some aluminum foil. What combination of materials would work best?
Aluminum foil wrapped around the soda and a woolen blanket wrapped around the sandwich
A woolen blanket wrapped around the soda and aluminum foil wrapped around the sandwich
Aluminum foil wrapped around each individually
A woolen blanket wrapped around each individually
Wrapping each separately with either material would work equally well
- 3. Multiple Choice
A hot 8-kg copper bar is placed in contact with a 5-kg copper bar at room temperature inside a good Styrofoam cooler. The hot bar does not melt the cooler. The cooler is tightly closed. Which statement below best describes the temperatures of the bars after an hour?
Both bars are at or very nearly ar the same temperature; the temperature is halfway between the original temperatures.
Both bars are at or very nearly at the same temperature; this temperature is closer to the original temperature of the cold bar.
The bars are at or very nearly at the same temperature; this temperature is closer to the original temperature of the hot bar.
The 5-kg bar has warmed up and the 8-kg bar has cooled off, but they will never be at the same temperature.
Both bars will be at room temperature.
- 4. Multiple Choice
For the next two questions, consider a system that consists of only the earth and box. A battery-powered motor not considered part of the system lift the box from the ground to a certain height above the earth's surface. Which statement below is most accurate after the box has been lifted?
The energy in the box has increased.
The energy in the box has decreased.
The energy in the system remains the same because the box is not moving.
The energy in the system has decreased.
The energy in the system has increased.
- 5. Multiple Choice
What has happened to the battery's energy as a result of lifting the box?
The battery's energy has increased.
The battery's energy remains the same.
The battery's energy has decreased.
The battery's energy decreases at first until it recovers as it rests.
There is not enough information to answer the question.
- 6. Multiple Choice
As a small sample of water freezes,
it absorbs energy from its surroundings.
it absorbs the coldness from its surroundings.
it absorbs coldness from and releases energy to its surroundings.
its surroundings absorb energy from it.
it neither absorbs nor releases energy because its temperature stays constant.
- 7. Multiple Choice
For the next two questions, consider a situation in which a 100 g aluminum plate and a 100 g wooden plate have been stored overnight in a freezer. These plates were designed to be the same size and shape. How do the temperatures of the aluminum and wooden plates compare when first removed from the freezer?
The aluminum plate will be at a lower temperature.
The wooden plate will be at a lower temperature.
Both will be at the same temperature.
Usually the aluminum plate will be at a lower temperature.
Usually the wood plate will be at a lower temperature.
- 8. Multiple Choice
One minute after they have been removed from the freezer and placed on a table in the same environment, how do the temperatures of the wooden and aluminum plates compare?
The aluminum plate will always be at a lower temperature.
The wooden plate will always be at a lower temperature.
Both would be at the same temperature.
Usually the aluminum plate will be at a lower temperature.
Usually the wooden plate will be at a lower temperature.
- 9. Multiple Choice
What happens to the electrical energy used to operate a toaster after the toaster is finished toasting?
It still exists in the toast and toaster, around the toaster, and in the air.
It is returned to the electrical company.
It is consumed by the toast.
It gradually disappears until non of it remains anywhere.
It becomes potential energy.
- 10. Multiple Choice
Just after warm chili is placed in the refrigerator,
the refrigerator gradually destroys all the heat in the chili until it has only coldness.
the chili gives up energy to the refrigerator and its contents.
the refrigerator gradually destroys some heat in the chili until it has mor coldness than energy.
the chili absorbs coldness from the refrigerator and its contents.
both choices (B) and (D) are true.
- 11. Multiple Choice
A small ice cube is placed in a refrigerator that maintains a temperature of 5ºC, At that moment the ice cube is observed to have a temperature of 0ºC. What will happen to the temperature of the ice?
It will decrease until the ice is completely melted.
It will fluctuate between 0ºC and 5ºC as the ice is melting.
It gradually increases to as much as 5ºC as it melts.
It increases to 5ºC, and then the ice begins to melt.
It will remain 0ºC until the ice is completely melted.
- 12. Multiple Choice
A steel ball rolls along a smooth, hard, level surface with a certain speed. It then smoothly rolls up and over the hill shown below. How does its speed at point B after it rolls over the hill compare to its speed at point A before it rolls over the hill?
Its speed is significantly less at point B than at point A.
Its speed is very nearly the same at point B as at point A.
Its speed is slightly greater at point B than at point A.
Its speed is much greater at point B than at point A.
The information is insufficient to answer the question.
- 13. Multiple Choice
Liquid water is boiling in a pan on a stove. The burner on the stove is set on LOW. While the water is boiling the burner is turned to the HIGH setting. What happens to the temperature of the liquid water?
It decreases slightly due to the extra boiling.
It decreases very much due to the extra boiling.
It increases, and it does so at a faster rate than when the burner was on LOW.
It increases, and it does so at the same rate as when the burner was on LOW.
It remains the same.
- 14. Multiple Choice
A balloon is inflated with a mixture of natural gas and air. A burning match is touched to the balloon, and the mixture explodes. The energy released by the explosion
was originally in the natural gas and air.
came from the match.
was not originally in the natural gas and air, but was produced in the reaction between the natural gas and air.
was originally in only the natural gas.
was originally in only the air.
- 15. Multiple Choice
For the next two questions, refer to the following situation: You spray a strong perfume in the center of a sealed (airtight) room. Which of the diagrams above represents how the perfume particles are spaced (distributed) a few seconds after you sprayed the perfume?
A
B
C
D
E
- 16. Multiple Choice
Which of the diagrams above represents how the perfume particles are spaced (distributed) several hours after you sprayed the perfume?
A
B
C
D
E
- 17. Multiple Choice
You have one of those steel tanks that scuba divers use for breathing. Your scientist friend pumps out all the air; then you weigh the empty tank. After that, he pumps air into the tank, and then you weigh it again. How does the weight of the tank and air compare to the weight of the empty tank?
The tank that contains the air weighs more.
The tank that contains the air weighs less.
The tank with air weighs the same as the empty tank.
- 18. Multiple Choice
For the next three questions, refer to the following: Two cups contain equal amounts (250 g) of coffee; one is cold, the other is hot. You add 10 g of sugar to each cup and stir. What is the mass of the contents of each of the cups?
250 g
somewhere between 250 g and 260 g
260 g
somewhat more than 260 g
- 19. Multiple Choice
What happens to the sugar particles when you add them to each of the cups of coffee?
They cease to exist.
They spread out through the coffee.
They become liquid.
They form a new and different type of substance with the coffee.
- 20. Multiple Choice
Why does the sugar dissolve faster in the hot coffee?
The sugar particles cease to exist faster when in a hot liquid.
The particles of hot liquid bump into the sugar particles more often.
The sugar becomes a liquid faster in a hot liquid.
The sugar forms a new substance faster in a hot liquid.
- 21. Multiple Choice
A glass half-full of room temperature water is on a table. You add some ice cubes to the water. Very soon droplets appear on the outside surface of the glass. Where do the droplets come from?
Water came through the glass from the inside.
They were squeezed from the glass.
They condensed from the air.
They are extracted out of the table.
- 22. Multiple Choice
You heat water on your kitchen stove until it boils. The bubbles that form when the water boils. . .
contain nothing.
contain particles bigger than water particles.
are air bubbles.
are water vapor.
contain hydrogen gas and oxygen gas.
- 23. Multiple Choice
For the next three questions, refer to the following: The diagram shows two sealed containers, each containing 25 g of a substance. The circles represent particles of matter magnified large enough to be seen. Which diagram represents particles as a liquid?
A
B
neither
- 24. Multiple Choice
The substance in the previous question was allowed to evaporate completely to a gas. Which of the diagrams below best represents the contents of the sealed container?
A
B
C
D
- 25. Multiple Choice
The original container had 25 g of a liquid substance. What is the mass of the gaseous substance in the container?
0
somewhat less than 25 g
25 g
somewhat less than 25 g
- 26. Multiple Choice
Below is a list of substances and their densities:
water 1.00 g/mL
iron 7.87 g/mL
lead 11.34 g/mL
You are given a 1.00 kilogram sample of each.
Which sample has the greatest mass?
The water
The lead
The iron
They all have the same mass
- 27. Multiple Choice
Below is a list of substances and their densities:
water 1.00 g/mL
iron 7.87 g/mL
lead 11.34 g/mL
You are given a 1.00 kilogram sample of each.
Which sample has the greatest mass?
The water
The lead
The iron
They all have the same volume
- 28. Multiple Choice
Study the matter in the figure at right. Assume the particles are uniformly distributed throughout each object, and particles of the same size have the same mass. Which of the following correctly ranks the density of the three objects?
X < Y < Z
X < Z < Y
X = Y < Z
X = Z < Y
- 29. Multiple Choice
For the next two questions, refer to the following: A shiny new iron nail is found to have a mass of 1.20 g. It is placed in a beaker which is set aside. A month later the nail appears to be covered with rust, which is formed by the reaction of iron and oxygen. The mass of the rusty nail is
1.20 g
less than 1.20 g
more than 1.20 g
impossible to tell
- 30. Multiple Choice
Which one of the following statements best explains your answer to the previous question?
Rust is softer and less dense than iron.
Oxygen slowly decomposes the iron away, leaving only rust behind.
The mass of the oxygen is added to the mass of the nail.
Oxygen reacts with the iron, but since it is a gas, it adds no mass.
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