BI-cells

Question 1

What are the different parts on a microscope?

Answer 1

The stage, the eyepiece, the slide, fine focus, coarse focus, the light and the objective lens.

Question 2

Copy and complete.

………..cells have special features to allow them to carry out their………. . Red blood cells carry………..around the body. Leaf cells are packed full of…………..to carry out………. .

Answer 2

Specialised cells have special features to allow them to carry out their job. Red blood cells carry oxygen around the body. Leaf cells are packed full of chloroplasts to carry out photosynthesis.

Question 3

What is diffusion?

Answer 3

Diffusion is spreading and mixing process. It occurs faster in gasses than in liquids but does not happen in solids. Substances pass in and out of cells by diffusion.

Question 4

Copy and complete.

Substances move from an area where they are in a………concentration to an area where they are in a………..concentration. This process is called……… .

Answer 4

Substances move from an area where they are in a high concentration to an area where they are in a low concentration. This process is called diffusion.

Question 5

Explain how the smell of perfume can move throughout a room.

Answer 5

Perfume moves by coming from low concentration to high concentration this is called diffusion.