Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
31 Cards in this Set
- Front
- Back
|
What are energy and work measured in? |
Joules (J) |
|
|
What is power measured in? |
Watts (W) |
|
|
Why is kinetic energy gained? |
Due to movement |
|
|
Why is gravitational potential energy gained? |
Due to where it is |
|
|
What can energy do? |
Be transferred and stored |
|
|
What is the equation for kinetic energy? |
1/2 X Mass x Velocity x Velocity |
|
|
What is the equation for potential energy? |
Mass x Gravity x height |
|
|
Name some different examples of energy |
kinetic,gravitational, chemical, strain, nuclear,thermal (heat), electrical, light and sound. |
|
|
Identify and explain 3 examples of energy conversion. |
-A toaster transforms electrical energy into thermal energy. - A blender transforms electrical energy into mechanical energy. -The sun transforms nuclear energy into ultraviolet, infrared, and gamma energy all forms of electromagnetic energy. |
|
|
List the rule of energy conservation |
Energy can neither be created nor destroyed, but can be changed from one form to another.
|
|
|
What is the difference between renewable and non-renewable energy? |
Renewable sources won't run out whereas non-renewable will. |
|
|
What is the sun? |
Source of all energy besides geothermal and nuclear. |
|
|
Explain nuclear fusion in the sun |
The Sun and other stars use nuclear fusion to release energy. The sequence of nuclear fusion reactions in a star is complex but overall hydrogen nuclei join to form helium nuclei.
|
|
|
How is electricity or other useful forms of energy obtained from chemical energy stored in fuel? |
|
|
|
How is electricity or other useful forms of energy obtained from water, including the energy stored inwaves, in tides, and in water behindhydroelectric dams?
|
Water is moved by wind, tidal energy, or being held back in a dam and then released; the movement turns generators in the water that create energy.
|
|
|
How is electricity or other useful forms of energy obtained from geothermal resources?
|
geothermal energy comes from hot rocks deep underground. The thermal energy released heats water, which creates steam that can drive generators or heat buildings. Nuclear energy is a reaction due to fission, and this also heats up water to create steam.
|
|
|
How is electricity or other useful forms of energy obtained from nuclear fission?
|
Nuclear energy is a reaction due to fission, and this also heats up water to create steam. |
|
|
How is electricity or other useful forms of energy obtained from heat and light from the Sun (solar cellsand panels)?
|
Solar cells and panels suck up heat energy directly from the Sun, as they must be in contact with the Sun in order to work.
|
|
|
How is electricity or other useful forms of energy obtained from wind?
|
Wind energy is using the wind's movement to push turbines and turn generators.
|
|
|
What are the advantages and disadvantages or fuel? |
Advantages; - ready-made- cheap Disadvantages;- unenvironmentally friendly- creates greenhouse gases |
|
|
What are the advantages and disadvantages of Wave power? |
Advantages; - renewable- does not produce greenhouse gases Disadvantages;- source may not always be present |
|
|
What are the advantages and disadvantages of Tidal power?
|
Advantages; - renewable- does not produce greenhouse gases Disadvantages;- source may not always be present |
|
|
What are the advantages and disadvantages of Hydroelectric power?
|
Advantages;- renewable- does not produce greenhouse gases Disadvantages;- hydroelectric plants affect life in the water- expensive to develop usage sites |
|
|
What are the advantages and disadvantages of Geothermal power?
|
Advantages;- renewable- does not produce greenhouse gases Disadvantages;- effectiveness varies on the location- expensive to develop usage sites |
|
|
What are the advantages and disadvantages of Nuclear power?
|
Advantages;- a small amount of radioactive material produces lots of energy- relatively cheap- no atmosphere pollutants Disadvantages;-creates nuclear waste- leakage of nuclear waste is very serious |
|
|
What are the advantages and disadvantages of Heat power? (from sun)
|
Advantages;- renewable- does not produce greenhouse gases Disadvantages;- source may not always be present- expensive to make solar panels |
|
|
What are the advantages and disadvantages of Light power? (from sun)
|
Advantages;- renewable, does not produce greenhouse gases Disadvantages;- source may not always be present |
|
|
What are the advantages and disadvantages of wind power?
|
Advantages;- renewable- does not produce greenhouse gases Disadvantages;- a lot of land is needed to build wind turbines- noisy- visual pollutant- energy can't be produced in large quantities- source may not always be present |
|
|
What is the equation for efficiency? |
efficiency = useful energy output/ Energy input ×
100% |
|
|
What is the formula for work done? |
Work Done= Force x Distance.
|
|
|
What is the equation for power? |
Power= Energy / Time |
