Quiz about HS Unit 5 Energy Practice Test

Question 1

What is the type of heat transfer Jonathan is MOST LIKELY investigating?

Accepted Answer

conduction

Answer

radiation

Answer

convection

Answer

condensation

Question 2

Anna is experimenting with pure water and salty water. She first adds heat to frozen pure water. Then, she draws the following heating curve. Afterwards, she takes a frozen, concentrated solution of salt water and adds heat to it. She notices that it melts at a lower temperature than the frozen pure water, but boils at a higher temperature. Which BEST predicts how Anna's heating curve changes for her concentrated solution of salt water?

Accepted Answer

Question 3

Iceland has become energy self-sufficient because Icelanders have learned to harness the energy from the island's many volcanoes. Magma below ground helps generate steam. This steam is captured by facilities above ground that use turbines to generate power for the people of Iceland. What is the sequence of energy transformations occurring in Iceland?

Accepted Answer

Thermal energy is transformed into mechanical energy, which is transformed into electrical energy.

Answer

Thermal energy is transformed into electrical energy, which is transformed into mechanical energy

Answer

Chemical energy is transformed into electrical

energy, which is transformed into mechanical

energy.

Answer

Chemical energy is transformed into mechanical

energy, which is transformed into electrical

energy.

Question 4

What conclusion can be drawn from the data?

Accepted Answer

Aluminum cans will keep soda colder longer than stainless steel cans.

Answer

Stainless steel cans will keep soda colder longer than aluminum cans.

Answer

Stainless steel cookware will heat up faster than copper cookware.

Answer

Cast iron cookware will cool off faster than aluminum cookware.

Question 5

What is the BEST explanation for why cookware that is made of metallic materials typically will have handles made of non-metallic materials?

Accepted Answer

The specific heat capacity of non-metallic materials makes them slower to heat up compared to metals.

Answer

The specific heat capacity of non-metals are typically greater than that of metals, making them heat up faster.

Answer

The thermal conductivity of metals makes them faster to heat up compared to non-metallic materials.

Answer

The thermal conductivity of metals makes them slower to heat up compared to non-metallic materials.

Question 6

Kinetic energy in the form of heat increases the motion of the molecules. Regions B and D of the heating curve represent segments of the curve where heat is being added, but the temperature is not changing. Which of the following is the BEST explanation for regions B and D of the curve and why?

Accepted Answer

The substance melts or evaporates because it is undergoing an endothermic phase change.

Answer

The substance freezes or condenses because it is undergoing an exothermic phase change.

Answer

The substance sublimes or deposits because it is undergoing an exothermic phase change.

Answer

The substance freezes or evaporates because it is undergoing an endothermic phase change.

Question 7

A student designed an experiment to test the following hypothesis: If a small pan of cold water (T2) is placed in a larger pan of hot water (T1), the cold water will become hot. What is the expected result of the experiment and why?

Accepted Answer

The hot water and the cold water will become warm because of the transfer of heat by conduction. Heat will then be transferred to the molecules of the cold water in the inner pan and throughout the cold water by convection.

Answer

The hot water will become cooler because heat will be transferred from the cooler water by conduction through the pan of cold water to the water molecules in the pan of hot water causing them to slow down.

Answer

The cold water will become hotter because the transfer of heat from the hot water to the cold water will occur as the result of the hot water coming into contact with the cold water. The warm water will mix with cold water by convection.

Answer

The hot water and the cold water will remain at the same temperature because placing the cold water in the pan of hot water will cause warming of the pan with the cold water so that both pans become warmer.

Question 8

Ashley observed charcoal briquettes in a grill, and after a while, she saw that they became red-hot. Which situation has the same type of energy transformation as those that Ashley observed in the briquettes?

Accepted Answer

A candle burning at night has the same kind of energy transformations.

Answer

A person eating a hamburger has the same kind of energy transformations.

Answer

A laser pointer projecting red light has the same kind of energy transformations.

Answer

Plant leaves have the same kind of energy transformations when they receive sunlight.

Question 9

Which example BEST demonstrates the conversion of nuclear energy into electrical energy?

Accepted Answer

A reactor generates heat by splitting uranium, creating steam that turns turbines to generate electricity.

Answer

Friction of water molecules in a cloud causes a large buildup of electrons in one area. When the voltage is large enough, a lightning bolt occurs.

Answer

In a hydro-electric dam, a large amount of water molecules flows downward from a water reservoir, turning turbines that generate electricity.

Answer

A fully charged battery is attached to a closed electrical circuit, causing electrons to flow through the circuit.

Question 10

Marcus wants to investigate how thermal energy can be transferred by convection. Which of the following scenarios would be a reasonable investigation?

Accepted Answer

Studying the transfer of heat by measuring the temperature of the water at the top of a body of water and at the bottom to determine which way the warm water will flow.

Answer

Studying the transfer of heat by sticking a metal spoon into a cup of hot water to determine if the handle of the spoon will heat up or not.

Answer

Studying the transfer of heat by taking the temperature of the air beside a fire and farther away from a fire to determine how far away the heat can be detected.

Answer

Studying the transfer of heat by taking the temperature on the outside and the inside of a wooden door facing the sun to determine if the heat can move through the door.

Question 11

Which of the following correctly describes an energy transformation that can be observed in an everyday situation?

Accepted Answer

Ice in soda glass melts when it is placed in sunlight on a window sill. Radiant energy from the sun is absorbed by the water molecules, which increases the speed that the molecules move. This is a transformation between light energy and kinetic energy.

Answer

Gasoline burns and powers a car engine when the bonds are broken between the molecules and the free electrons flow. This is a transformation between electromagnetic energy and chemical energy.

Answer

A pot of water is heated by a stove as the heat energy moves from the stove top to the metal of the pot. This is a transformation between mechanical energy and thermal energy.

Answer

The sun is powered by the fusion of large atomic nuclei that creates heat and light for the solar system. This is a transformation between chemical energy and light energy.

Question 12

Which of the following accurately explains the energy transformation that happens when a match is lit, and why?

Accepted Answer

Chemical energy is transformed to heat and light energy because the match head burns and changes color.

Answer

Heat energy is transformed to electromagnetic and light energy because the match head burns and creates flames.

Answer

Heat energy is transformed into light and chemical energy because the match head creates friction as it strikes the surface.

Answer

Chemical energy is transformed into heat and potential energy because the match head particles begin to move more rapidly when burning.

HS Unit 5 Energy Practice Test

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