Question 1

Which of the following terms best describes ice floating in water?

Accepted Answer

Ice floating in water is a heterogeneous mixture because it consists of more than one phase (solid ice and liquid water) that are not uniformly distributed.

Question 2

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the fuel cell and the turbine?

Accepted Answer

The fuel cell contains hydrogen and oxygen gas, which react chemically to produce energy. This is an example of chemical energy. The steam produced from the reaction drives a turbine, which is an example of mechanical energy.

Question 3

A nuclear power plant uses uranium-235 to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What are the initial and final forms of energy in this process?

Accepted Answer

The initial form of energy is nuclear energy, as uranium-235 is being used to generate heat through nuclear fission. The final form of energy is electrical energy, as the generator is producing electricity as a result of the turbine's movement.

Question 4

According to the kinetic theory,what happens to gaseous molecules when the temperature of a gas increases?

Accepted Answer

According to the kinetic theory, the temperature of a gas is directly proportional to the average kinetic energy of its molecules. Therefore, as the temperature of a gas increases, the kinetic energy and velocity of its molecules will also increase simultaneously, resulting in greater molecular motion and collisions.

Question 5

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What changes are involved in the process?

Accepted Answer

The process involves converting chemical energy (from the reaction of hydrogen and oxygen) to heat energy (explosion/steam production), then to mechanical energy (turbine movement), and finally to electrical energy (generator output), encompassing all the changes listed.

Question 6

According to the conservation of mass and energy law,which of the following is true of a nuclear fusion bomb?

Accepted Answer

A small amount of mass is converted into a large amount of energy in a nuclear fusion bomb, according to the conservation of mass and energy law (E=mc²). This means that the mass of the bomb and the fusion products is not identical, and the energy released is much greater than the original mass. Therefore, choices B and C are incorrect.

Question 7

According to the kinetic theory,what happens to gaseous molecules when the temperature of a gas decreases?

Accepted Answer

According to the kinetic theory, the kinetic energy of gaseous molecules is directly proportional to the temperature. Therefore, if the temperature of a gas decreases, both the kinetic energy and the velocity of its molecules decrease.

Question 8

A nuclear power plant uses radioactive uranium to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the uranium and the turbine?

Accepted Answer

Uranium, being radioactive, represents nuclear energy due to the nuclear reactions it undergoes. The turbine, which is driven by steam to turn a generator, represents mechanical energy as it involves the physical movement of the turbine blades.

Question 9

Which of the following is a form of energy?

Accepted Answer

All of the options listed are forms of energy. Chemical energy is stored in the bonds of molecules, mechanical energy is associated with motion and position, and nuclear energy is associated with the nucleus of an atom.

Question 10

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What are the initial and final forms of energy?

Accepted Answer

The initial energy in the fuel cell is chemical energy stored in the hydrogen and oxygen gas. The final form of energy is electrical energy produced by the generator. Therefore, the correct choice is C (chemical energy and electrical energy). The other options (A, B, D, and E) are incorrect because they either do not match the initial and final forms of energy or involve different forms of energy (such as nuclear energy).

Question 11

What happens to the kinetic energy of a molecule when a gas is heated?

Accepted Answer

When a gas is heated, the temperature increases which in turn increases the kinetic energy of the gas molecules. The increase in temperature means that the gas molecules move faster, collide more frequently and with more energy, and therefore have higher kinetic energy.

Question 12

A nuclear power plant uses radioactive uranium to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the uranium and the steam?

Accepted Answer

Uranium in the nuclear power plant undergoes nuclear reactions which release energy in the form of heat. This heat energy is then used to convert water into steam, which possesses thermal/heat energy. The nuclear energy and heat energy are the two forms of energy represented by uranium and steam in a nuclear power plant.

Question 13

When a cannonball is shot from a cannon,at what point in its flight is the kinetic energy of the cannonball at a maximum?

Accepted Answer

The answer of When a cannonball is shot from a...

Question 14

According to the conservation of mass and energy law,which of the following is true of mass and energy?

Accepted Answer

The conservation of mass and energy law states that the total mass and energy in an isolated system remains constant, regardless of changes in state or composition of the system.

Question 15

Which of the following is a form of energy?

Accepted Answer

Heat, light, and nuclear are all forms of energy. Therefore, the correct answer is D, all of the above.

Question 16

Which of the following is a form of energy?

Accepted Answer

Chemical, electrical, and mechanical are all forms of energy. Therefore, option D is the correct answer.

Question 17

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the fuel cell and the steam?

Accepted Answer

The fuel cell converts chemical energy from hydrogen and oxygen into heat energy, which is then used to produce steam.

Question 18

What happens to the velocity of a molecule when a gas is heated?

Accepted Answer

When a gas is heated, the temperature of the gas increases. Due to this increased kinetic energy, the molecules of the gas move faster and their velocity increases.

Question 19

A nuclear power plant uses plutonium-239 to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.Which is not a form of energy in this process?

Accepted Answer

The process of converting water to steam using plutonium-239 does not involve the use or conversion of any form of chemical energy. The other options are all involved in the process – electrical energy in the production of electricity, heat energy in the conversion of water to steam, mechanical energy in the turning of the turbine, and nuclear energy in the use of plutonium-239.

Question 20

According to the conservation of mass and energy law,which of the following is true of an atomic fission bomb?

Accepted Answer

According to the conservation of mass and energy law, a small amount of mass is converted into energy in an atomic fission bomb, releasing a large amount of energy. Therefore, option C is the correct choice. Option A is incorrect because the mass of the fission products is less than the mass of the original bomb due to the conversion of some mass into energy. Option B is incorrect because energy is not conserved in the fission process - the total energy before and after the fission is not the same. Option D and E are also incorrect for the aforementioned reasons.

Quiz 3: Matter and Energy

Which of the following terms best describes ice floating in water?

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the fuel cell and the turbine?

A nuclear power plant uses uranium-235 to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What are the initial and final forms of energy in this process?

According to the kinetic theory,what happens to gaseous molecules when the temperature of a gas increases?

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What changes are involved in the process?

According to the conservation of mass and energy law,which of the following is true of a nuclear fusion bomb?

According to the kinetic theory,what happens to gaseous molecules when the temperature of a gas decreases?

A nuclear power plant uses radioactive uranium to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the uranium and the turbine?

Which of the following is a form of energy?

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What are the initial and final forms of energy?

What happens to the kinetic energy of a molecule when a gas is heated?

A nuclear power plant uses radioactive uranium to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the uranium and the steam?

When a cannonball is shot from a cannon,at what point in its flight is the kinetic energy of the cannonball at a maximum?

According to the conservation of mass and energy law,which of the following is true of mass and energy?

Which of the following is a form of energy?

Which of the following is a form of energy?

A fuel cell contains hydrogen and oxygen gas.The gases react explosively and the energy converts water to steam.The steam drives a turbine which turns a generator to produce electricity.What two forms of energy are represented by the fuel cell and the steam?

What happens to the velocity of a molecule when a gas is heated?

A nuclear power plant uses plutonium-239 to convert water to steam.The steam drives a turbine which turns a generator to produce electricity.Which is not a form of energy in this process?

According to the conservation of mass and energy law,which of the following is true of an atomic fission bomb?