click below
click below
Normal Size Small Size show me how
GJHS Ch. 13
| Question | Answer |
|---|---|
| Energy is measured in units called ____________. | joules |
| Kinetic energy increases as both mass and velocity _____________. | increase |
| Unlike kinetic energy, potential energy is ______________. | stored |
| The total energy of the particles in an object is called _____________ energy. | thermal |
| A match stores ______________ energy. | chemical |
| Work is the transfer of _____________ from one object to another. | energy |
| If a truck and car are moving at the same speed, the vehicle with the greater energy would be the truck, because it has a greater ____________. | mass |
| _________________ energy,such as ultraviolet light, comes from the sun. | Electromagnetic |
| As water goes over the waterfall, its gravitational potential energy is converted to _______. | kinetic |
| Fossil fuels contain ___________ potential energy. | chemical |
| In power plants, coal is often burned to produce ________ that turns a turbine. | steam |
| Power is equal to _____________ divided by time. | work |
| The ability to do work is called______________. | energy |
| The energy associated with motion is called ________________ energy. | kinetic |
| Rubbing your hands together converts mechanical energy to _____ energy | thermal |
| The type of energy stored by fossil fuel is _____________potential energy. | chemical |
| Fossil fuels contain energy that ORIGINALLY comes from _____________. | the sun |
| An example of fossil fuel is: | Petroleum (coal or natural gas is also correct) |
| Niagara Falls is a good example of _________ energy being converted to ___________ energy. | potential, kinetic |
| _________, algae, and some bacteria can convert solar energy to chemical energy. | Plants |
| When work is done on an object, the object gains __________. | energy |
| A compressed spring has __________ ________________ energy. | Elastic potential |
| __________ is the rate at which work is done. | Power |
| The ___________ energy of a book on a shelf is equal to the work done to lift the book to the shelf. | potential |
| During combustion a fuel's __________ energy is converted to thermal energy. | chemical |
| The scientist who suggested that energy can be created under certain conditions is _________. | Einstein |
| What type of conversion is taking place when natural gas is used to heat water? | Chemical energy into thermal energy |
| Fossil fuels contains energy that originally came from the ____________. | sun |
| A device that is twice as powerful as another can do the same amount of work in ________ the time. | half |
| The power of a light bulb that converts electrical energy at a rate of 100 joules per second is ______________ _____________. | 100 watts |
| One horsepower is equal to how many watts? | 746 watts |
| The rate at which work is done is ____________. | power |
| In nuclear reactions huge amounts of energy are produced by destroying tiny amounts of _______. | matter |
| The law of ______________ _________ __________ states that energy can not be created or destroyed. | Conservation of Energy |
| A force pushes an object over a distance of 2 meters. If six joules of energy is transferred to the object the size of the force is ___________N. | 3 |
| If the velocity of an object is doubled its kinetic energy is multiplied by _________. | 4 |
| An ice cube melts when its _________ energy increases. | Thermal |
| A light bulb converts ___________ energy to electromagnetic energy. | electrical |
| In a machine work output is less than work input because some energy is converted to __________ energy. | thermal |
| _______________ is rate at which work is done. | Power |
| A 100 watt light bulb converts electrical energy to electromagnetic energy at a ______ rate than a 40 watt light bulb. | faster |
| A rolling bowling ball has ________ energy. | kinetic |
| Energy stored in a core of an atom is called _________ energy. | nuclear |
| Potential energy that depends on height is called ______________ potential energy. | gravitational |
| Visible light is an example of ________ energy. | electromagnetic |
| Most forms of energy can be ________ into other forms. | converted |
| The process of burning a fuel is called ________. | combustion |
| The law of conservation of energy states that when one form of energy is converted into another no energy is ____________ in the process. | destroyed (or created) |
| Power is measured in units called _________. | watts |
| Power equals work divided by ____________. | time |
| What type of energy does a spinning turbine have? | Mechanical |
| When fossil fuels are burned, their chemical potential energy is converted into _________ energy. | thermal |
| When generators are spun by turbines they produce ___________. | electricity |
| A device that is twice as powerful as another can do ___________ the amount of work in the same amount of time. | twice |
| Power is the rate at which ____________ is transferred from one object to another, or converted from one form to another. | energy |
| A 200 watt light bulb converts electrical energy at a rate of _________ joules each second. | 200 |
| Over long periods of time, buried animal and plant remains are converted into fossil fuels by high temperatures and __________. | pressure |
| An electric motor converts electrical energy to __________ energy. | mechanical |
| To maintain body temperature your body converts chemical potential energy into _______ energy. | thermal |
| A baseball flying through the air has ________ energy because of its motion. | mechanical |
| The energy in the fuel of a rocket is ________ energy. | chemical |