In any energy chain, some of the energy is lost in the form of ...........
sound
heat
solar
The electric lamp converts ........ energy into light and heat energy.
electrical
thermal
............ is example of biofuel, while ...............is example of fossil fuel.
coal , wood
oil , wood
wood, coal
Engineers try to reduce the weight of the solar vehicles to increase its ........
mass
direction
speed
When the mass of a moving object decreases, its kinetic energy............at the same speed.
decrease
increase
To operate an electric mixer we use ............. energy.
kinetic
The energy that is produced from the battery and used to operate a toy car is ........... energy.
The speed of .......... vehicles is slower than that of normal vehicles.
sun
When you ride a bicycle, the ........energy stored in your body is converted into .......... energy which causes the bicycle to move.
thermal , kinetic
chemical , kinetic
chemical , thermal
We can use some forms of fuel such as ..........and ...........in warming houses.
charcoal , wood
charcoal , oil
During a car crash, the ......... is inflated with a gas
wrecking ball
seatbuilt
airbag
When objects crash with each other, then .......transfers between them.
distance
energy
The energies that are produced from the washing machine are .....energy and .............energy.
chemical, sound
kinetick , chemical
kinetick , sound
Coal and ............can be used in electric power stations to generate electricity.
oil
water
wood
In electric heater, .......... Energy is considered as an input energy , while thermal energy is considered as .......... energy.
electrical , output
electrical , input
thermal , output
The big truck needs .... engine.
small
big
As a result of hitting the ball with the bat, the direction of the ball will ...............
be stop
change to same direction
change to opposite direction
When the car stops suddenly, the passengers move .........
backward
forward
The mobile phone converts chemical energy stored in its batteries into .......energy and ............. energy.
heat, light
light , sound
sound, light
The energy can be .......... from one form to another.
decreases
converted
increases