Which make our work easier and faster?
Simple machines
Generators
Cars
Inverter
What is solar energy?
Energy we get from earth
Energy we get from water
Energy we get from wind
Energy we get from sun
Which force tries to pull two objects towards each other?
Mechanical force
Muscular force
Gravitational force
Frictional force
Which energy converts kinetic energy from falling water into electricity ?
Solar energy
Wind energy
Hydropower
Geothermal energy
Levers are classified in to:
Four
Five
Two
Three
Which is the man made thing used to move things?
Water
Air
Crane
Wind
Any influence that causes an object to undergo a certain change, either concerning its movement or direction is called:
Force
Matter
Change
Vibration
Which is built to trap water?
Dams
Canals
Well
Tank
Why should energy sources be used carefully?
Because energy sources are in limited supply.
Because energy sources are present in abundance.
Because energy sources are renewable.
Because energy sources are present in unlimited supply.
When we burn lights in our house:
Electrical energy is converted into light energy
Electrical energy is converted into sound energy
Electrical energy is converted into heat energy
Electrical energy is converted into mechanical energy
