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