RAM and ROM

RAM and ROM are both types of memory used by personal computers.

1.- Which one of these types of memory is volatile?
2.- Explain the difference between volatile and non-volatile memory.
3. - Why does a personal computer need both of these types of memory?

COMPUTERS - Bits and bytes

Watch the video and answer the questions bellow:

1. How many bits are in one byte?
2. How many bytes are needed to store one character of text data?
3. How many bytes are needed to store the sentence shown below:

The quick brown fox jumps over the lazy dog

4. - Which is the largest number (decimal) you can represent with a byte?

5.- Sort the computer memory sizes listed below into increasing order of size with the smallest first and the biggest last:

10MB 100KB 5GB 50 MB 500KB

PLASTICS

Plastics are versatile and flexible materials .
All plastics are based on polymers and they are created by bonding molecules together.
The terms monomer and polymer are very important in the plastics industry. A monomer is a relatively small molecule that can chemically bond to other monomers, forming a polymer. Remember, all plastics are polymers.

There are different types of plastic:

Thermosettings plastics
Once 'set' these plastics cannot be reheated to soften, shape and mould. The bond between the molecules is very strong.

Thermoplastics
These plastics can be re-heated and therefore shaped in various ways. They become mouldable after reheating. Reheating and shaping can be repeated. The bond between the molecules is weak These types of plastics can be recycled.


1.- Read the text, looking for the meaning of those words you do not understand.
2.- Write down this vocabulary in your notebook

Cecilia I don't know how to do it.

Cecilia I have a problem with the powerpoint because I don't know how to put off the questions and put my questions¿?

If you can solve my problem coment this entry please.
Thanks.

Energy production and environmental damage

Electrical energy is produced in many ways.

Energy is sometimes produced in such a way that the environment around us is damaged.

But... in which way is the environment damaged? Answer the following questions to find out a bit more about how our planet is in danger...

http://www.technologystudent.com/energy1/less2.htm

Write down the new voacbulary you have learnt in your notebook.

A bit more about poer stations...

Now you Know the vocabukary you need to understand how a power station works, let´s see a bit more...

1. Write some advantages and disadvantages of the conventional power station (Fossil fuels)

2. Classify the energy sources in Renewable and Non renewable:

3. Explain the greenhouse effect and the acid rain.

THe video!!!!!!!!!!!!!!!!!!!!!!!

http://www.greenpeace.org/espana/campaigns/bosques/kit-kat-take-action-2