Question

These are 10 fairly straight foward mutiplechoice questions. If you could provide a breief scentence or two(for questions 1-7 only) on why you chose each answer you did thatwould be great! Many of the questions have image Linksprovided.

1- How does the total amount of energy in a human body changewhen a person eats food?

How does the total amount of energy in a human body change whena person eats food?

A. The total amount of energy in the human body stays same.

B. The total amount of energy in the human body decreases.

C. The total amount of energy in the human body increases.

2- Which of the following describes how energy is transferredbetween the sun and a tree?

Which of the following describes how energy is transferredbetween the sun and a tree?

A. Energy is transferred as light radiated from the sun anddirectly absorbed by the tree.

B. Energy is transferred as an electrical current that travelsfrom the sun to the tree.

C. Energy is transferred as thermal energy given off from thesun and directly absorbed by the tree.

D. Energy is not transferred between the sun and the tree.

3-https://secure.surveymonkey.com/_resources/15782/40125782/6f31c027-378d-4a2f-9304-36c46a38afa2.jpg

(See Figure 7) Given the food chain shown above, what energywould be available to the wolf?

A. All of the energy from the Sun, grass anddeer.

B. All of the energy from the Sun and grass, minus the energy inthe deer.

C. All of the energy transferred from the Sun to the grass.

D. Only the energy contained in the grass.

E. Some of the energy transferred from the Sun to the grass tothe deer.

4- Why can%u2019t any alternative energy sources have 100%energy efficiency?

Why can%u2019t any alternative energy sources have 100% energyefficiency?

A. Because alternative energy resources are intermittent, withdaily and seasonal variations in supply.

B. Because alternative energy resources are not equallyavailable in all locations.

C. Because alternative energy is transformed into a more usefulenergy form.

D. Because some amount of alternative energy is transformed to aless useful energy forms.

5-https://secure.surveymonkey.com/_resources/15782/40125782/60a3f0fe-3983-4f7e-8c5d-d2a610102e19.jpg

(see Figure 8) What can you tell about the energy of these cars?

A. Car A possesses more energy than Car B.

B. Car B possesses only kinetic energy and Car A possesses onlypotential energy.

C. Both cars possess the same amount and types of energy.

D. Car A possesses less energy than car B.

6-. Household appliances convert electricity into one or moredifferent forms of energy.

An electric fan can best be described as converting electricityinto

Household appliances convert electricity into one or moredifferent forms of energy. An electric fan can best be described asconverting electricity into

A. heat energy only

B. heat energy and sound energy only

C. heat energy, sound energy, and mechanical energy only

D. heat energy, sound energy, mechanical energy, and chemicalenergy

7.https://secure.surveymonkey.com/_resources/15782/40125782/96afddb9-86fd-4463-85d8-9d8c1b4a959b.jpg

(See Figure 9) How does the total energy of the ball and tracksystem change as the ball rolls along the track?

(Note: Assume no air friction)

(See Figure 9) How does the total energy of the ball and tracksystem change as the ball rolls along the track? (Note: Assume noair friction)

A. Increases

B. Increases first then decreases

C. Decreases

D. Decreases first and then increases

E. Remains the same

8.https://secure.surveymonkey.com/_resources/15782/40125782/8be46601-9270-47e4-a97f-e73a7ad3e63b.jpg

See Figure 10) What can you tell about the thermal energy of thewarm milk, the thermal energy of the cold milk, as well as thethermal energy of the mixture?

(See Figure 10) What can you tell about the thermal energy ofthe warm milk, the thermal energy of the cold milk, as well as thethermal energy of the mixture?

A. The warm milk holds more thermal energy than thecold milk. The temperature of the mixture lies between the initialtemperature of the warm milk and the cold milk. The thermal energyof the mixture equals the sum of the thermal energy of the warmmilk and the thermal energy of the cold milk.

B. The cold milk does not play any role in the thermal energy ofthe mixture. Thus, the thermal energy of the mixture equals theinitial thermal energy of the warm milk. However, since there ismore milk after mixing, the temperature of the mixture is lowerthan the temperature of the warm milk.

C. As the cold and warm milk are mixed, thermal energy istransferred from the warm milk to the cold milk. The thermal energyof the mixture is smaller than the thermal energy of the warm milk.This is because the temperature of the mixture is lower than thetemperature of the warm milk.

D. As the milk is mixed, the cold milk extracts thermal energyfrom the warm milk. As a result, the amount of thermal energy ofthe mixture is less than the thermal energy of the warm milk, butthe temperature of the mixture is higher than the temperature ofthe cold milk.

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(See Figure 11) On which course do you have to hit the ballharder to get the ball reach the hole?

(See Figure 11) On which course do you have to hit the ballharder to get the ball reach the hole? A. One would have to hit theball harder on course B than on course

A. Due to friction, the ball looses more kinetic energy on thelong course than on the short one.

B. One would have to hit the ball harder on course B than oncourse A. The ball looses more kinetic energy on the long coursebecause the ball has to get over more humps than on the shortcourse.

C. It does not matter how hard the ball is hit. As the kineticenergy of the hit is stored in the ball, it is sufficient just totake aim carefully.

D. One would have to hit the ball harder on course B than oncourse A, because there are more humps on the long course, the ballgets additional kinetic energy and can move farther.

See Figure 12) How can a swinging pendulum be described usingthe term %u2018energy%u2019?

How can a swinging pendulum be described using the term%u2018energy%u2019?

A. When moving upward, the kinetic energy of the pendulum istransformed into gravitational energy. When moving downward, thependulum%u2019s gravitational energy is transformed back intokinetic energy.

B. The kinetic energy of the pendulum decreases when movingupward. When the pendulum is moving downward the kinetic energy ofthe pendulum is increasing. The gravitational energy of thependulum never changes because the pendulum is fixed at the pivotpoint.

C. While moving upward, the gravitational energy of the pendulumis transformed into kinetic energy. Afterwards, while moving down,kinetic energy is transformed back into gravitational energy.

D. Kinetic energy of the pendulum is transformed intogravitational energy at a constant rate. As a result the amount ofkinetic energy is decreasing and the pendulum eventually stopsswinging.