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