an electronic device that is sent into space and moves around the earth or another planet. It is used for communicating by radio, television, etc. and...
solar cell
a device that converts light and heat energy from the sun into electricity
heat
the level of temperature
calculator
a small electronic device or piece of software for calculating with numbers
generator
a machine for producing electricity
battery
a device that is placed inside a car engine, clock, radio, etc. and that produces the electricity that makes it work
turbine
a machine or an engine that receives its power from a wheel that is turned by the pressure of water, air or gas
arrange
To put in a certain order
tide
the flow of water that happens as the sea rises and falls
produce
to make something
run out of
to have no more of (something)
movement
an act of moving the body or part of the body
energy
a source of power, such as fuel, used for driving machines, providing heat, etc.
discuss
to talk about something with somebody, especially in order to decide something
blade
long and thin with sharp sides
toward
in the direction of somebody/something
barrier
an object like a fence that prevents people from moving forward from one place to another
machine
a piece of equipment with moving parts that is designed to do a particular job. The power used to work a machine may be electricity, steam, gas, etc....
windmill
a tall thin structure with parts that turn round, used to change the power of the wind into electricity
electricity
a form of energy to power machines or devices.
reflect
to show the image of somebody/something on the surface of something such as a mirror, water or glass
renewable
that is replaced naturally or controlled carefully and can therefore be used without the risk of finishing it all
amount
a quantity of something
waterwheel
a wheel turned by the movement of water, used, especially in the past, to drive machinery
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