MAKE AN EASY LAVA LAMP

WE NEED:

• Water
• A clear plastic bottle
• Vegetable oil 
• Food coloring
• Alka-Seltzer(or other tablets that fizz)

HOW TO DO IT;

1. Pour water into the plastic bottle until it is around one quarter full
2. Pour in vegetable oil
3. Add food coloring
4. Watch the food coloring mixing with the water
5. Cut an Alka-Seltzer tablet and drop it into the bottle
6. When the bubbling stops add another piece.

PROCESS:

RESULT:

MY OPINION:

I like this lamp of lava because is very funny and interesting!!!

BY ESTHER

DOES AN ORANGE FLOAT OR SINK?

WE NEED: 

• An orange
• A deep bowl or container
• Water

HOW TO DO IT:

1. Fill the bowl with water.
2. Put the orange in the water and see what happens.
3. Peel the rind from the orange and do the experiment again.
4. What happens this time?


PREDICTIONS:

RESULTS:

The first time you put the orange in the bowl of water it probably floated on the surface, after you removed the rind however, it probably sunk to the bottom, why? The rind of an orange is full of tiny air pockets which help give it a lower density than water, making it float to the surface. Removing the rind (and all the air pockets) from the orange increases its density higher than that of water, making it sink. Density is the mass of an object relative to its volume. Objects with a lot of matter in a certain volume have a high density, while objects with a small amount of matter in the same volume have a low density.

OUR OPINION:

BALLOONS AND PINS

WE NEED: 

• Balloons (2)
• Pins (20 )

HOW TO DO IT:

1. Take a pin and place it on the table.

2. Take your balloon and see what happens when you put it on the pin.

3. Next take the whole full of pins

4. Then, take another balloon and try doing the same thing and see what happens.

PREDICTIONS:

RESULTS:

This is because of pressure. You have a certain force that the gas particles, which are always moving, bouncing off the sides of the balloon exert to keep the balloon inflated. When you use a needle, it is a very very tiny area at the tip of the needle, so only a little force gives a lot of pressure (pressure = force/area).

The reason it does not pop with your finger is because it is not very much pressure as you have a much greater area, and as you can see from the equation above, the same force has considerably less pressure.

Once this hole is created, the particles in the air inside the balloon would much rather be at a lower energy (moving slower) than they are contained inside the balloon. They instantaneously rush out to an area of lower pressure (the surrounding), thus you have a pop!

OUR OPINION:

INFLATING A BALLOON WITHOUT AIR

WE NEED:

• Plastic water bottle
• White Vinegar
• Balloon
• Soda

HOW TO DO IT:

1. Put some white vinegar into the plastic bottle

2. Put some  soda inside the balloon

3. Put the balloon over the top of the bottle

4. Empty the soda into the plastic water bottle and watch the reaction.


PREDICTIONS:

RESULTS:

When vinegar and baking soda mix, they create the gas carbon dioxide and water. The carbon dioxide has no where to go, but into the balloon - blowing it up.

VINEGAR

+

SODA

=

CARBON DIOXIDE -- it inflates the balloon

OUR OPINION:

EXPLODING BALLOONS?

WE NEED:

• Balloons
• A candle
• A lighter
• Water

HOW TO DO IT:

1. Take a candle and lighter it up.

2. Inflate a balloon and see what happens when you hold it over the flame.

3. Take another balloon and fill it with water

4. See what happens when you hold it over the candle. 

PREDICTIONS:

RESULTS:

The candle is a source of heat and will add heat energy to any object it touches. If this is well thermally insulated like the rubber in the balloon, the object will heat up to many hundreds of degrees Celsius. Rubber can't cope with these temperatures and it fails, causing the balloon to pop.

If there is water in the balloon the heat can be very efficiently transferred to the water.  Water takes a huge amount of energy to heat up, so it stays relatively cool for a long time, cooling the balloon and stopping it heating up.

OUR OPINION:

OUR ROCKET

WE NEED: 

• Two plastic bottles
• Water
• Scissors
• An air pump
• A cork

HOW TO DO IT:

1. Decorate a plastic bottle.
2. Cut another plastic bottle and stick it on the back of the other.
3. Add water inside the plastic bottle.
4. Put the end of the air pump on the cork.
5. Cover the bottle with the cork.

PREDICTIONS:

RESULTS:

MY OPINION: 

This experiment has been super fun and very impressive.

BY: ALBA

FOOD COLOURING, BLEACH AND DISHWASHER SOAP

WE NEED:

• A deep dish
• Full-cream milk
• Dishwasher soap
• Food colouring
• Cotton swabs 

HOW TO DO IT:

1. Put some full-cream milk in a deep dish.

2. Add food colouring in the centre of it.

3. Dip a cotton swab in the dishwasher soap.

4. Put the cotton swab in the centre of the food colouring.

PREDICTIONS:

PROCESS:

RESULTS:

Full-cream milk, as the name says, contains all the fat or grease that normal milk has. As you know, dishwasher soap is degreaser, which means that takes out the grease. Food colouring helps us see the movement of the milk, and it moves because it has grease and we are adding a degreaser, it is like the milk is "afraid" of the soap.

MILK (FAT OR GREASE)

+

DISHWASHER SOAP (DEGREASER - TAKES OUT THE FAT OR GREASE)

=

THE MILK GOES AWAY FROM THE SOAP

OUR OPINION:

USE A STRAW TO STAB A POTATO

WE NEED:

• Plastic drinking straws.
• A raw potato.

HOW TO DO IT:

1. Take the plastic drinking straw.
2. Try quickly stabbing the potato.
3. Repeat the experiment with a new straw.
4. Put your finger over the top, covering the hole.
5. Try quickly stabbing the potato.    

    

PREDICTIONS:

The straw is going to stab the potato in both tries.


RESULTS:

Placing your thumb over the hole at the top of the straw improves your ability to pierce the potato skin and push the straw deep into the potato. The first time you tried the experiment you may have only pierced the potato a small amount, so why are you more successful on the second attempt?

Covering the top of the straw with your thumb traps the air inside, forcing it to compress and helping the straw not being deformed as you stab the straw through the potato skin. This makes the straw strong enough to pierce the potato, unlike the first attempt where the air is pushed out of the straw.

STRAW

+

THUMB (AIR TRAPPED - COMPRESSED)

=

PIERCED POTATO

MY OPINION: 

This experiment has been great because I did not expect the straw is nailed to the potato.

BY: ALBA

TASTE TESTING WITHOUT SMELL

WE NEED:

• A small piece of peeled potato.
• A small piece of peeled apple (same shape as the potato so you can't tell the difference)

HOW TO DO IT:

1. Close your eyes.
2. Mix up the piece of apple and the piece of potato.
3. Hold your nose.
4. Eat each piece, can you tell the difference?

PREDICTIONS:
We think that we are going to recognise the apple and the potato.



PROCESS:

RESULTS:
Some of us could recognise the food, but others couldn't!

Your nose and mouth are connected through the same airway, which means that you taste and smell the food at the same time. 

Your sense of  taste can recognize salty, sweet, bitter and sour. When you combine this with your sense of smell you can recognise many other individual 'tastes'. Take away your smell (and sight) and you limit your brain's ability to tell the difference between certain foods.

MOUTH: SENSE OF TASTE (salty, sweet, bitter and sour)

+

NOSE: SENSE OF SMELL

=

A LOT OF TASTES

MOUTH

-

NOSE

=

DIFFICULT TO DIFFERENTIATE SIMILAR TASTES

MY OPINION:

I liked it very much because it has been fun and I laughed a lot.

BY: ALBA

FOOD COLOURING & BLEACH

WE NEED:
          

• A glass
• Water
• Food colouring
• Bleach

HOW TO DO IT:

1. Put some water in the glass.                                                                                                                             
2. Add food colouring.                                                                                                                                     
3. Add some bleach.                                                                                                                         
4. Mix it.                                                                                                                                                                                                                                                                          

PREDICTIONS:

RESULTS:

There is a component in the bleach (sodium hypochlorite) that is a strong oxidant. This means that it takes electrons from other compositions, discolouring them. To sum up, bleach "steals" electrons from food colouring and they can't colour the water anymore.

FOOD COLOURING (electrons)

+

BLEACH (sodium hypochlorite = oxidant)

=

NO COLOUR

MY OPINION:

I like the experiment because the bleach changed the colour of the food colouring.

                                                                                                        BY: Dèlia

EGG & VINEGAR

WE NEED 

• An egg .
• Some vinegar.
• A glass.

   
HOW TO DO IT

1. Put  the egg in the glass .
2. Add some vinegar to the glass.
3. Let it rest four two or more days.

PREDICTIONS

RESULTS



The shell of the egg is gone! Why? Because it is made of calcium carbonate and if we add vinegar this calcium changes its composition creating small particles of calcium, the vinegar becomes dark brown, and CO2 bubbles that we see in the glass.
As the shell is gone, the vinegar can enter the next part of the egg and it changes its size, it is bigger than a normal egg.

EGG'S SHELL (CALCIUM CARBONATE)

+

VINEGAR

=

CALCIUM + CO2 (BUBBLES) + BIGGER SIZE

OUR OPINION

We like this experiment because is funny and interesting.

By Dèlia, Marta and Xènia

THE EGG WHITE

WE NEED

• An egg.
• A fork.
• A  bowl.

HOW TO DO IT

1. Break the egg.
2. Separate the egg white and the yolk 
3. Put the egg white on the bowl.
4. Beat the egg white using the fork.

PREDICTIONS




RESULTS

The egg white contains a lot of proteins that are organized in a natural way. When we beat the egg white we are breaking these proteins, a process called denaturalisation, that's why the egg white changes its colour. At the same time, the proteins add air to their organisation creating bubbles and increasing its volume.

OUR OPINION

We like this experiment!!! 

By :IZASKUN AND MARISOL

THE COLOUR MOVEMENT

WE NEED

• Three glasses with water
• Paint (red, blue and yellow)
• Paper serviettes

HOW TO DO IT

1. Fill the glasses with water and add red, blue and yellow paint.
2. Roll up two paper serviettes.
3. Put the paper serviettes in the glasses like this.

PREDICTIONS

RESULTS

The process that we can see with this experiment is called capillarity. This is a characteristic of the liquids that makes them go up and down a capillary. It is also the way in which plants absorb the water and the components dissolved in the water to "eat".
The colours aren't mixed up because the second part of the serviette is already occupied by the liquid of the other colour.


OUR OPINION

We like this experiment because is funny and a very interesting thing.

BY: ALBA AND ESTHER

THE COKE'S MYSTERY

WE NEED

• A bottle of Coke
• Salt

HOW TO DO IT

1. Predict what would happen if we add salt to a bottle of Coke.
2. Go to the playground.
3. Stay in a big circle around the bottle of Coke.
4. Let the teacher add salt to the bottle.
5. Observe the results. What has happened?

PREDICTIONS

RESULTS

The coke has got carbon dioxide (CO2) dissolved. Carbon dioxide can "scape" from the coke if some bubbles are "created". To create bubbles, we must separate water molecules (H2O). The composition of the salt helps the water molecules to separate and to liberate the carbon dioxide by creating bubbles.

COKE (CO2 + H2O)

+

SALT - breaks H2O - CO2 scapes

=

GAS BUBBLES

MY OPINION

I liked this experiment and I want to do more experiments with the girls. I hope that next day their behaviour will be better and that we will have a great time learning science!

By Nerea

WELCOME BACK!

Hi, girls!

How were the Christmas holidays? Did you have fun with your family and friends?

During the first term, we worked around ICT skills, which means Information and Communicative Technology. 

This second term we are going to continue with ICT skills because we have a new blog!

Otherwise, this second term is about SCIENCE.

And this is our new Science Blog. Do you like it?

How the classes of the Science term are going to work:

• Listening to a SCIENCE SONG
• Looking at the report on the blog.
• Worksheets: material needed + instructions.
• Predictions about the experiment.
• A changing science reporter: take photos + update the blog.
• Doing the experiment.

The AIM is to know more things related to science but in English, of course!

Do you like doing experiments?

Do you know any experiment that we can do in class?

Let's see what is the first experiment... !

Nerea