If we place opposite poles of magnets near each other, they ___________
Starts with
B
It is a biological material from plants and animals, which has chemical energy that can be transformed into electrical or thermal energy. It can also be used to make special fuel
Starts with
C
Materials that allow electrical charges to move freely
Starts with
D
The main principle of energy states that "energy can't be created nor __________, it can only be transformed"
Starts with
E
When an electric current travels through a piece of magnetic metal, it creates an ________________
Starts with
F
An electrical current is the _________ of electrical charges through materials
Starts with
G
Starts with
H
For these power plants to work, water moves a turbine which is connected to a generator
Starts with
I
These materials do not allow electrical charges to move through them
Starts with
J
What cloth can we use to charge negatively a pen, so that it attracts small papers?
Starts with
K
When we place a MOTOR on a working circuit, in what type of mechanical energy is electricity transformed?
Starts with
L
Starts with
M
What property of the Earth helps us to orient ourselves with a compass?
Starts with
N
This form of energy is released when the atoms of some elements, such as uranium and plutonium, join together or split apart
Starts with
O
Turn _____ the lights when you leave the room to save energy
Starts with
P
When a pen is rubbed against a jumper, the JUMPER gets _____________ charged
Contains
Q
Global worming is a _____________ of the increase of greenhouse gasses on the atmosphere
Starts with
R
This kind of energy sources are continuously replenished / generated and will never run out
Starts with
S
Starts with
T
Energy can be ______ from one body to another. For example, when we hit a ball with a racket
Starts with
U
A radioactive nuclear fuel used in nuclear power plants to get electrical energy
Starts with
V
Which is the unit of electrical energy?
Starts with
W
Our body is 70% this substance, but it is very dangerous near electric current
Contains
X
Burning fossil fuels releases _________ substances, causing air pollution. This substances can produce acid rain.
