scienglis: abril 2016

Hello! In this Unit we are going to learn about Electricity. Electricity is all around us and is the presence and flow of electric charge.

ELECTRICAL CHARGES

Electricity begins with the atom, this is the smallest particle in matter.

Atoms are made up of protons and neutrons inside a nucleus and electrons moving around .

Sometimes, electrons move from one object to another and this makes the object electrically charged.

Now is your turn!
Try this experiment: pick up a pen and rub it against your shirt. What happens?

Both objects were electrically neutral and after the experiment the pen is positively charged and your shirt is negatively charged.

FORCES BETWEEN ELECTRICAL CHARGES

Depending on their charges, electrically charged objects attract or repel each other.

Let´s check this out with an experiment!

Pick up a balloon and rub it against your hair. What happens? Do they attract? Do they repel?

CURRENT ELECTRICITY

The movements of electrons from one object to another creates eletrical current. This electrical current can be transported and produced in a closed electrical circuit.

Is important to know that Electricity can be made from renewable or non- renewable energy sources.
You have studied these in previous units.

RENEWABLE ENERGY SOURCES

Solar energy
Water energy
Biomass
Wind energy
Geothermal energy

NON- RENEWABLE SOURCES OF ENERGY

Fossil fuels
Uranium

Two students from 6th grade, Nadia and Karina, made a summary about Wind energy.

Wind power

What is it used for?: To produce electricity with wind energy.

Type of renewable energy: Wind Power.

How many people around the world use it every day?: Spain is the fifth country in which more wind energy is used (approximately more than twenty thousand people).

Which country uses it the most?: India.

How do we get it?: Wind energy is the energy from wind , ie the kinetic energy generated by the effect of air currents , and is transmuted into other useful forms of energy for human activities.

What are its advantages and disadvantages?: The advantages are that we get electrical energy without polluting and energy from the wind , and the disadvantages are that destroy the environment, noise pollution.

These are some links to funny games where you can practice what you have learnt. Enjoy!!

http://www.childrensuniversity.manchester.ac.uk/interactives/science/energy/renewable/

http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks3/science/elecricity_2/electricity.swf

http://www.bbc.co.uk/schools/scienceclips/ages/6_7/electricity_fs.shtml

http://www.bbc.co.uk/schools/scienceclips/ages/10_11/changing_circuits_fs.shtml

http://www.bbc.co.uk/schools/scienceclips/ages/8_9/circuits_conductors_fs.shtml