These are 10 fairly straight foward mutiple choice questions. If you could provi
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These are 10 fairly straight foward mutiple choice questions. If you could provide a breief scentence or two (for questions 1-7 only) on why you chose each answer you did that would be great! Many of the questions have image Links provided.
1- How does the total amount of energy in a human body change when a person eats food?
How does the total amount of energy in a human body change when a 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 transferred between the sun and a tree?
Which of the following describes how energy is transferred between the sun and a tree?
A. Energy is transferred as light radiated from the sun and directly absorbed by the tree.
B. Energy is transferred as an electrical current that travels from the sun to the tree.
C. Energy is transferred as thermal energy given off from the sun 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 energy would be available to the wolf?
A. All of the energy from the Sun, grass and deer.
B. All of the energy from the Sun and grass, minus the energy in the 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 to the deer.
4- Why can%u2019t any alternative energy sources have 100% energy efficiency?
Why can%u2019t any alternative energy sources have 100% energy efficiency?
A. Because alternative energy resources are intermittent, with daily and seasonal variations in supply.
B. Because alternative energy resources are not equally available in all locations.
C. Because alternative energy is transformed into a more useful energy form.
D. Because some amount of alternative energy is transformed to a less 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 only potential 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 more different forms of energy.
An electric fan can best be described as converting electricity into
Household appliances convert electricity into one or more different forms of energy. An electric fan can best be described as converting 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 chemical energy
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 track system 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 track system change as the ball rolls along the track? (Note: Assume no air 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 the warm milk, the thermal energy of the cold milk, as well as the thermal energy of the mixture?
(See Figure 10) What can you tell about the thermal energy of the warm milk, the thermal energy of the cold milk, as well as the thermal energy of the mixture?
A. The warm milk holds more thermal energy than the cold milk. The temperature of the mixture lies between the initial temperature of the warm milk and the cold milk. The thermal energy of the mixture equals the sum of the thermal energy of the warm milk and the thermal energy of the cold milk.
B. The cold milk does not play any role in the thermal energy of the mixture. Thus, the thermal energy of the mixture equals the initial thermal energy of the warm milk. However, since there is more milk after mixing, the temperature of the mixture is lower than the temperature of the warm milk.
C. As the cold and warm milk are mixed, thermal energy is transferred from the warm milk to the cold milk. The thermal energy of the mixture is smaller than the thermal energy of the warm milk. This is because the temperature of the mixture is lower than the temperature of the warm milk.
D. As the milk is mixed, the cold milk extracts thermal energy from the warm milk. As a result, the amount of thermal energy of the mixture is less than the thermal energy of the warm milk, but the temperature of the mixture is higher than the temperature of the cold milk.
9- https://secure.surveymonkey.com/_resources/15782/40125782/871383ed-af6e-4a19-bf44-1264203135d6.jpg
(See Figure 11) On which course do you have to hit the ball harder to get the ball reach the hole?
(See Figure 11) On which course do you have to hit the ball harder to get the ball reach the hole? A. One would have to hit the ball harder on course B than on course
A. Due to friction, the ball looses more kinetic energy on the long course than on the short one.
B. One would have to hit the ball harder on course B than on course A. The ball looses more kinetic energy on the long course because the ball has to get over more humps than on the short course.
C. It does not matter how hard the ball is hit. As the kinetic energy of the hit is stored in the ball, it is sufficient just to take aim carefully.
D. One would have to hit the ball harder on course B than on course A, because there are more humps on the long course, the ball gets additional kinetic energy and can move farther.
See Figure 12) How can a swinging pendulum be described using the 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 is transformed into gravitational energy. When moving downward, the pendulum%u2019s gravitational energy is transformed back into kinetic energy.
B. The kinetic energy of the pendulum decreases when moving upward. When the pendulum is moving downward the kinetic energy of the pendulum is increasing. The gravitational energy of the pendulum never changes because the pendulum is fixed at the pivot point.
C. While moving upward, the gravitational energy of the pendulum is transformed into kinetic energy. Afterwards, while moving down, kinetic energy is transformed back into gravitational energy.
D. Kinetic energy of the pendulum is transformed into gravitational energy at a constant rate. As a result the amount of kinetic energy is decreasing and the pendulum eventually stops swinging.
Explanation / Answer
C. The total amount of energy in the human body increases.
C. Energy is transferred as thermal energy given off from the sun and directly absorbed by the tree.
E. Some of the energy transferred from the Sun to the grass to the deer.
A. Because alternative energy resources are intermittent, with daily and seasonal variations in supply.
Car A possesses more energy than Car B.
C. heat energy, sound energy, and mechanical energy only
Remains the same
A. The warm milk holds more thermal energy than the cold milk. The temperature of the mixture lies between the initial temperature of the warm milk and the cold milk. The thermal energy of the mixture equals the sum of the thermal energy of the warm milk and the thermal energy of the cold milk.
A. One would have to hit the ball harder on course B than on course
A. Due to friction, the ball looses more kinetic energy on the long course than on the short one.
A. When moving upward, the kinetic energy of the pendulum is transformed into gravitational energy. When moving downward, the pendulums gravitational energy is transformed back into kinetic energy.
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