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.

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

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.

Food: vocabulary

Los nombres de las siguientes comidas no van a ser evaluados en ninguno de los cursos, pero está bien que los de primero se familiaricen con alguno más y que los de tercero le peguen un repaso.

The food pyramid

Os cuelgo una pirámide alternativa que está más actualizada.

 

Adapted from Harvard School of Public Health
Copyright © 2011, Harvard University. For more information about The Healthy Eating Plate, please see The Nutrition Source, Department of Nutrition, Harvard School of Public Health, www.thenutritionsource.org, and Harvard Health Publications, www.health.harvard.edu.






Healthy Weight


Y toda la colección de How the Body Works

Different foods, different nutrients

Remember:

NUTRIENTS are SMALL SUBSTANCES in FOOD. They GIVE us ENERGY, MATERIALS and VITAMINS and MINERALS.

NUTRIENTS	WHAT DO THEY DO?
Proteins	They give us materials to grow and repair the body
Vitamins and minerals	They help the body work.
Carbohydrates	They give us energy
Fats	They give us energy
Fibre	It helps intestines work
Water	It helps the body work.

And remember: we also need fibre and water to stay healthy.

Is it healthy or unhealthy?

Healthy Unhealthy Food Quiz

Healthy habits

Remember that healthy habits are:

-HEALTHY DIET (eat healthy food)

-EXERCISE (move your body, do sports)

-HYGIENE (wash your hands; have a shower…)

-REST (Sleep well)

-POSTURE (sit properly)

The healthy habits Song

The excretory system

The excretory system is responsible for removing (eliminate) unwanted substances from the body. It is part of the vital function of nutrition

The circulatory system transports the waste to the excretory system.

The kidneys filter the waste and disolve it in water. The remaining (what is left) fluid (liquid, in this context) is called urine (pee).

Circulatory system

The circulatory system is responsible for transporting nutrients and oxygen around the body.

Nutrients: from the digestive system, to the rest of the body.

Oxygen: from the respiratory system, to the rest of the body.

Also, the circulatory system carries (transports) the waste (unwanted substances) to eliminate.

CO2: from the body, to the respiratory system.

Other waste: from the body, to the excretory system.

It is involved in the function of nutrition.