Energy
Energy Conversions
Forms of Energy
Fossils Fuels
Other
100
Energy is measured in the unit called___________
What is a joule
100
What are four types of potential energy
What is nuclear, elastic, chemical, and gravitational energy
100
Energy associated with motion is called___________
What is kinetic energy
100
what are the four types of kinetic energy?
What is thermal, electromagnetic, mechanical, and electrical
100
light rays from the sun is considered what type of energy?
What is electromagnetic energy (radiant energy)
200
What is energy?
What is the ability to do work
200
What are the three ways which energy can be transfered
What is conduction, convection, and radiation
200
compare the amount of energy of coal compared to the amount of energy from wood.
What is coal produces twice the energy of wood
200
what are the three primary types of fossil fuels
What is oil(petroleum), natural gas, and coal
200
what two factors affect the amount of kinetic energy
What is mass and velocity
300
The total energy of all the particles of a substance is called_____
What is temperature
300
A match is an example of an object that contains what type of energy?
What is chemical energy
300
Describe thermal energy
What is the total potential and kinetic motion of the particles of a particular object.
300
how long does it take for fossil fuels to form?
What is 300-500 million years
300
what is gravitational potential energy? what factors determine it?
What is gravitation potential energy is the energy that is related to the height of the object. The factors are height and weight
400
State the Law of Conservation of Energy
What is Energy is neither created nor destroyed it simply changes form
400
Describe the type of energy transformation that takes place when you cook beans over a fire
What is chemical to thermal energy
400
There is an object at 100 degrees and another at 70 degrees. Describe what happens when the two objects touch one another.
What is since energy always flows from the warmer object to the cooler object, the object at 100 degrees will decrease in temperature and the object at 70 degrees will increase in temperature until the reach a point in which the temperature between the two objects is the same.
400
what is the origin of the energy that is contained in fossil fuels?
What is the sun
400
Which has more kinetic energy? a roller coaster with ten people in it or the identical roller coaster with five people in it?
What is since it is the same roller-coaster the velocity remains the same. However, the different number of people means that there is different mass. The roller-coaster with more people will have more mass. Since kinetic energy depends on velocity and mass. The roller-coaster with ten people has more kinetic energy.
500
How does energy change on a roller coaster at the top of the hill compared to the bottom of the hill?
What is at the top of the hill you have high potential energy because height has increased and low kinetic energy because motion has decrease. At the bottom of the hill you have low potential energy because height has decreased and high kinetic energy because motion has increased.
500
when you use rub two your hands together to keep warm, what type of energy transformation is taking place?
What is mechanical to thermal
500
Explain why a thrown football has both potential and kinetic energy. What is the combined energy called?
What is The football has (gravitational) potential energy because of its position above the ground. It also has kinetic energy because it is moving. The combined energy is called mechanical energy.
500
How are fossil fuels used to produce electricity?
What is The fuels are burned and the thermal energy released is used to boil water. The steam is used to turn turbines. The turbines are connected to generators that produce electricity.
500
Explain how to calculate an objects mechanical energy
What is add the potential and kinetic energy
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