When objects crash with each other, then .......transfers between them.
Distance
energy
When a piece of coal is burnt, .......... Energy is produced.
thermal
Potential
Both hair dryer and electric water kettle produce ...........energy.
light
Electric wires are made of .............
copper
wood
Hydroelectric energy is generated from .........
waterfalls and dams
biofuel and fossil fuel
When the car stops suddenly, the passengers move .........
Forward
backward
The produced ...... energy doesn't help the blender do its job.
kinetic
sound
The big truck needs .... Engine.
Big
small
Kinetic energy doesn't affect by the ..........
Mass
color
.......... is considered as the main resource of energy on Earth's surface.
The sun
Natural gas
When you use the hand ball, the ....energy changed into sound energy.
electrical
When you turn on a light bulb, the electrical energy travels through .......... until reaching the bulb.
plastic
wires
The car needs ........... to move.
fuel
water
Coal is a type of fuel, which is used in all the following purposes except ...........
warming houses
operating TV
To keep playing with the toy car, we have to .............. the batteries.
replace
heat
All the following are found deeply under earth's surface except ......
green plant
coal
In a battery of a toy car ........... energy changes into electrical energy.
chemical
Curiosity rover is designed to explore .........
The Moon
Mars planet
When the car fuel completely runs out, then the car's ...... becomes zero.
speed