Front

Which situation does NOT adhere to the law of conservation of energy?

• A ball rolled up a hill has the same amount of total energy at the bottom of the hill as it does when it gets to the top of the hill.
• A book dropped from a person's hand has the same amount of potential energy in the person's hand as it does on the ground.
• A chemical is burned, and its energy is not lost but instead released into another form.
• A metal cord carrying electrical energy transforms that energy into heat energy.

Back

A book dropped from a person's hand has the same amount of potential energy in the person's hand as it does on the ground.

Front

Jenna is examining an energy diagram for a chemical reaction. What conclusion can she make based on the diagram?

Back

Jenna concluded that the diagram shows an exothermic reaction, which means that thermal energy was released. This conclusion is supported by the decrease in stored energy of the products.

Front

What term is given to a reaction which transfers heat energy to the surroundings?

Back

Exothermic

Front

If the energy change on an energy level diagram is negative, what does this tell you about the reaction?

Back

It is exothermic

Front

If a reaction releases more energy when new bonds are made than the amount of energy absorbed to break bonds in the reactants, which statement is true?

Back

It is exothermic

Front

During a lab, Harry combines two chemicals together. As the chemical reaction occurs, Harry records the change in temperature in the data chart. What can Harry conclude from his data?

Back

Harry concluded that he observed an endothermic reaction, which means that thermal energy was absorbed. This conclusion is supported by the decrease in temperature.

Front

At point O, what is being brought into the home and sent back out to the power lines?

Back

electrical energy

Front

At point M, which type of energy transformation is most likely taking place? Options: electrical energy to heat energy, light energy to electrical energy, electrical energy to sound energy, electrical energy to light energy.

Back

light energy to electrical energy

Front

At point N, which type of energy transformation is most likely taking place? Options: electrical energy to heat energy, light energy to electrical energy, electrical energy to sound energy, electrical energy to light energy.

Back

electrical energy to heat energy

Front

At point P, which type of energy transformation is most likely taking place? Options: electrical energy to heat energy, light energy to electrical energy, electrical energy to sound energy, electrical energy to light energy.

Back

electrical energy to sound energy