Chemicals of Life


Carbohydrates Carbon, Hydrogen, Oxygen, Glucose To provide the body and brain with energy BBC UK
Proteins Carbon, Hydrogen, Oxygen, Nitrogen Fatty acids and glycerol Growth and repair of cells BBC UK
Lipids (fats; oils) Carbon, Hydrogen, Oxygen. Amino acids Source of energy, lipids provide storage and insulation. BBC UK


Extra features in plant cells

Our teacher Male gave us this assignment: Plants have additional features that are not present in animal cells.

a- Revisit the animations from last lesson, and construct a Venn diagram to show differences and similarities between animal and plant cells.

b- Take a picture to the diagram and post it in the blog.

c- Pair work: Copy and complete exercise 4, page 19 and add it in the same post


Cell structure and organisation

Welcome to our new topic: CELLS

We have already learnt that there are multicellular and unicellular organisms. That is to say, that some living organisms are made of one cell and others of more than one cell. So….what is a cell?

1- Read the text 2.1 “Cell structure and organisation”, page 15 and solve exercise 1.

2- Search in the web pictures where examples of structures named in the exercise above are shown. (stomach,tissue,body system, organs, organism, cell, root). Add them in a new post in your blog. Remember to label the pictures and write down the meaning of each word.

Stomach: an animal organ that process food.
Tissue: grouped cells of the same type

Organs: a group of tissues that work together.

Body system: a group of organs that work together


Organism: a living thing.
Cell: the basic unit of all living things
Root: a plant organ that absorbs water.

Classification of Living Organisms

During class, our tacher Male, asked us to make a classification chart of arthropods and vertebrates. Here is my chart:


The real length of the centipide was 10 mm. This picture is 5 cm long.

length of drawing =                               5 cm 

length of the real centipide = 10 mm = 1 cm

= X 5

The drawing is five times larger than the real centipide.