Electrical charges

There are two types of electrical charges: positive and negative. 

  • If an object has more positive than negative charges,it is positively charged.
  • If an object has more negative than positive charges, it is negatively charged.
  • If an object has the same number of positive and negatice charge, it is neutral.

Objects with opposite charges,attract each other;and objects with the same charges repel.



  • Electrical current is the flow of electrical charges.
  • It transmits energy called electricity.

Electrical current flows differently, depending on the type of material through which it flows.

Conductorselectrical current flows easily through conductors.
Most metals are conductors.

Insulators: electrical current does not flow easily through insulators,such as air,glass,plastic,wood and rubber.


When electrical currents circulate through a conductor, they can produce:

  • Heat. When electrical current circulates through a wire, it can heat up. This is what
happens in a toaster or electric grill.

  • Light. Electrical current can produce light as we can see in the light bulb on the right.
  • Sound. Electrical current can be transformed into sound in loudspeakers on a radio.
  • Magnetism. When electrical current circulates through wire, the wire behaves like a magnet. Electromagnets use this effect.

  • Movement. In electric motors, the electrical current produces a turning movement. These motors have a magnet and a conductor wrapped around an axis, like fans or drills.


Magnetism is the property some substances
have to attract metal;like iron.These substances area called magnets.

There are natural and artificial magnets.

Magnets can be natural, such as the
mineral magnetite, or artificial, such as
magnets manufactured from metal.

An electromagnet behaves like a magnet when
it is connected.

 What will happen to the paper clips when the battery is disconnected?

 Electrical circuits

As you can see in the diagram, an electrical circuit is formed by various
elements connected in a way that allows the circulation of an electrical current.

A generator, for example, a battery, produces the electrical current. A generator has two poles or terminals. Electrical charges exit through one terminal and enter through the other. In this way, an electrical current is created.

Cables,transmit the electrical current from the generator to the other components of the circuit. Generally, electric cables are made of copper wires and are covered with plastic.

Light bulbs, electric motors and other components convert the electrical current into light, movement, heat and sound.

make it possible to control the current in the circuit. They make current flow and stop flowing.
For current to flow, a circuit must be closed. This means that all components are connected, and the switch is closed.

Static electricity or current electricity


Electricity and circuits games
Electric circuits
circuits and conductors

Now it is time for you to create your own circuit or magnet. We are looking forward to seeing it in the classroom.

Here you have some ideas:

Homemade electro magnet

Review in Spanish
 Circuits in Spanish
More experiments


Last Monday,our classes had an exhibition of experiments that the students have searched.We enjoyed it very much so we invite you to try them at home and have Science Fun!

Name of the experiment: Filtration by Christian,Angel and Javi.
Name of the experiment: Filtration by Alberto.

Materials: Sand, water, cups, filters.
Procedures: mix the sand and the water in the cup.
Resolution: The sand stays in the filter while the water filtrates through it.

Name of the experiment: Different types of filtration by Pablo Villanueva
Materials: filter, cups, water, sand, cup with a cloth.
Procedure: Get sand and water in the cup with the filter, and in the cup with the cloth.
Resolutions: the water in the cup with the filter gets dirtier than the water in the other cup with the cloth.

Name of the experiment: The vinegar bubbles by Ainhoa and Andrea

Name of the experiment: Balloon inflates by itself by Claudia

Name of the experiment: Big Bomb

Materials: vinegar, baking soda, balloon, a plastic bottle

Procedures: pour vinegar in the bottle and the baking soda in the balloon. Place the balloon in the bottle
Resolution: the mixture of the vinegar and the baking soda, makes a chemical reaction that inflates the balloon.

Name of the experiment: Cola versus Soda by Adrian Mendez
Name of the experiment: Coca cola soda by Alba y Olga
Materials: Coca cola, baking soda
Procedure: Mix them in a tall cup or bottle
Resolution: There is a chemical reaction that spills the mixture.

Name of the experiment: Density by Adrian de la Torre
Materials: Cheackpeas, plastic things
Procedures: Place the cheakpeas and the plastic objects in a box an shake it.
Resolution: Due to the bigger density of the cheackpeas they stay at the boon of the container.

Name of the experiment: Bread soup by Yaiza
materials: Bread crumbs, water
Procedures: Mix them together
Resolutions: also due to the density of the bread crumbs they stay at the bottom of the container.

Name of the experiment: Magic mud of potatoes by Ricardo and Daniel Londoño
materials: potatoes and tonic water
Procedures: Boil the potations in hot water and when they are almost done, get the starch out of it and mix it with tonic water
Resolution: you will get a mass similar to clay.

Name of the experiment: Starch flour by Anderson
Materials: Water, starch flour
Procedures: Mix it and remove it.
Resolution: You get a hard-liquid mass.

Name of the experiment: Coloured Explotion by Veronica
Name of the experiment:Volcano by Valentin
Name of the experiment. Geizer by Zaida
Name of the experiment: Volcano by Pilar
Materials: Baking soda, vinegar or lemon,containers, food colorant
Procedures: Mix in the containers the vinegar or lemon with the baking soda and the food colorant.
Resolution: there is a chemical reaction, similar to the eruption of a volcano.

Name of the experiment: Cristal Corals by Guillermo
Materials: Magnesium sulphate,water, paper, colorants.
Procedures. Mix the magnesiu, sulphate with the water and the different food colorant in different containers
Resolution: Coral Crystal result form the mixture.

Name of the experiment: Magical CD by Aroa
Materials: CD,a bottle cap,tape and a balloom
Procedures: Inflate the balloom and hold it with tape to the cap of the bottle that is also stick to the cd with more tape.
Resolution: the air inside the ballom will move the cd by itself

Name of the experiment: Lava Lamp by Youssra
Materials: oil, glitter,food colorant, effervescent tablets.
Procedure: Mix everything in a container and wait few moments
Resolution: The gas in the tablets will mix all the elements in the container.

Name of the experiment:Oxidation by Pablo Martin and Jorge
Materials: Apple, metals, knive
Procedure: we cut on  the apples and put into water one piece of metal
Resolutions: After a while the apple and the wet metal have got rusted.

Name of the experiment: Static force by Yeilin and Sumaira
Name of the experiment: Crazy Straw by Luna and Luis
Materials: Straw, and a bottle of water or a cork with the straw and a pin
Procedures: Rub the straw againt your jumper for few seconds and place it on the bottle.
Resolution: The straw moves without touching it following one of your fingers movements.

Name of the experiment: Bye-bye water
Materials: balloon,bottle of water with a hole where we introduce the straw a container.
Procedures: Inflate the balloom and place it on the bottle.
Resolution: the pressure of the air in the ballom will make the water come out of the bottle through the straw.
Name of the experiment: Flying cardboard by Yifei
Materials: Cardboard,water and a glass
procedure: Fill the glass with water and place the cardboard on it and overturn it.
Resolution:The pressure of the water on the cardboard will keep it together.

Name of the experiment: Invisible Ink by Luna and Luis
Materials: Lemon juice, candle, paint brush and paper
Procedure: Write with the paintbrush and the lemon juice on a paper a secret message.Put the candle next to it to get it dry.
Resolution: You can read the secret message when it dries up.

Name of the experiment: maggic Egg
Materials: fresh eggs, salt
Procedure: make a bed of salt and place the eggs on it. Blow the salt away
Resolution: the eggs stays still 

Name of the experiment: Exploting ballooms
Materials: Ballooms, and orange skin
Procedure: Peel the orange and blow up the balloom. Place them and rub the skin of the orange on them.
Resolution: the balloms will start to explote magically.

Hopefully you have found an experiment that you want to do. Go for it and tell us your experiences!!!

Thank you kiddos for your experiments!!


Making experiments with dissolutions



The female reproductive system is formed by external sex organs and internal sex organs (located inside the pelvis).
The ovaries produce egg cells. There is one ovary on each side of the uterus.
The uterus is where a fertilised egg cell develops into a fetus.
The fallopian tubes connect the ovary with the uterus. The egg cell travels along them.
The cervix is the narrow part of the uterus that leads to the vagina.
The vagina is a muscular canal that leads from the vulva (the external organ) to the uterus.

1.- First, sperm cells are produced inside the testicles.
2.- Then the vas deferens transport sperm cells from the testicles to the seminal vesicles.
3.- Next, the sperm cells are transported through the prostate into the urethra.
4.- Finally the semen travels through the urethra and out of the penis. This process is called ejaculation.

Fertilization and Pregnancy

A man and a woman have sexual intercourse
The man deposits his semen in the woman's vagina. 
The sperm cells swim into the uterus and up the fallopian tubes, where one of them will fertilise the female egg cell. 
When a sperm cell joins with an egg cell in the fallopian tube, they form a new cell called a zygote (click here to watch a video about fertilisation).
 The zygote that results goes into the uterus. as it travels, it divides many times to form a group of cells called an embryo, and finally it develops into a fetus.

Pregnancy is the period of time between the fertilisation of an egg cell and the birth of a baby.
The placenta provides the fetus with oxygen and nutrients from the mother's blood. It also takes away carbon dioxide and waste that the fetus produces.
The fetus is connected to the placenta by the umbilical cord.
The amniotic sac contains a liquid called amniotic fluid. This liquid supports the fetus and protects it.

The birth


Nutrition is the study of food and how it works in your body. Nutrition includes all the stuff that's in your food, such as vitamins, protein, fat, and more. It's important to eat a variety of foods, including fruits, vegetables, dairy products, and grains, so you have what you need to grow and be healthy. 



More information about the digestive system-Click please

Any Questions? Let´s keep on studying


Let´s learn about this topic

sing along



Respiratory process

Click to review your learning

Some videos about how our senses work

 The 6 graders are working in  the Nervous system so we post some pages and materials they could check to learn more things about this topic.

Some information


         How the Brain works

More information

Let´s make a try

Very interesting web

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