Chemical reactions experiments

Como había prometido, aquí tenéis algunos añadidos al experimento que se realizó en clase sobre reacciones químicas.

Experiment 1: What does react with bicarbonate?

Elements:
-Sodium bicarbonate.
-Vinegar
-Water
-Lemon juice

Procedure:
Mix the bicarbonate with the water, the vinegar and the lemon juice separately. Write down which ones react.

Think:
Do they have anything in common?


Experiment 2: Is the reaction faster at higher temperature?

Elements:
-Sodium bicarbonate.
-Vinegar.
-Microwave.
-Thermometre
-Stopwatch

Procedure:
Put vinegar into two glasses. Take the temperature of the first glass (room temperature), and write it down. Add a teaspoon of bicarbonate and meassure the time it takes to finish the reaction (no more bubbles). Warm up the second glass and repeat the procedure (take the temperature and meassure the time it takes to react with the stopwatch).

Think:
Does it take take less time when it is hot?



Quien quiera probar nuevos experimentos sobre de qué dependen las reacciones tendrá que venir a los sábados de ciencia.

Bat and friends

The story of cats

Can we use a screw to move things up?

This is a screw

Do you think that we can use a screw to move things up?

Check this video on how screws help us moving things up.

Fantastic!! Isn't it?
In the next video you can see how to build your own Archimedes screw.





Enjoy!!

Simple machines

Sid the seed

How can plants make their own food?

Plants, algae and some bacterias can make their own food. That means they do not have to eat other plants or animals to use their energy.
The following video explains how they do it.




And rememeber:

Photo=light (like in photography, photograph...)
Synthesis= Putting together.

Parts of a plant

Fossil fuels and renewable energies

What are fossil fuels? How are they created?



Fossil fuels and renewable energies.
Este video ha sido creado por alumnos de EEUU. Explican las diferentes fuentes de energía renovable y no renovable y las ventajas e inconvenientes de cada una (para el examen solo entran las del resumen, pero está bien que las vayamos viendo).

Vertebrates and invertebrates

Energy

Different materials

1-Marble

2-Glass

3-Iron

4-Rubber

Recycling glass

The 3 R's Reduce; Reuse; Recycle

Physical and Chemical change

Physical changes: The substance remain the same.

Chemical changes: New substance is formed.