1. B1 Smart Teach
Foundation
Session 4

2. Antiseptics and Antibiotics
Antiseptics are used in hospitals, kitchens etc to kill pathogens that are on NOT inside the body. Antibiotics are medicine that are used to cure bacterial infections – Bacteria living inside the human body. Will antibiotics cure a viral (virus) infection?

3. Either ask pupils to complete the question or discuss it and link to the notes they have just made.

4. Exam Questions
1. Chemicals, other than antibiotics, can be used to prevent bacterial growth. Give the name of one of these chemicals.
Another exam question similar to the last to show pupils that it is important to remember what antibiotics/antiseptics are.

5. Complete the exam questions. 8 marks = 8 minutes

6. Use green pens to mark work and stick in books.

7. New Title: Energy Transfer Through A Food Chain
Keywords: Producer – Green plants - they make food by photosynthesis. Primary Consumer - Usually eat plant material - they are herbivores. Secondary Consumer - Usually eat animal material - they are carnivores. Predator - Kill for food. They are either secondary or tertiary consumers Prey - The animals that predators feed on.

8.
The animation on bitesize is very useful to show how energy is lost through a food chain

9. Knowledge Question How is energy lost through a food chain? Excretion
Respiration
Movement
Temperature regulation (keeping warm)
Not whole organism eaten/some of the organism is not digestable.
I like to link this to what happens if we eat too much and do too little – the energy is stored and is available however if we exercise a lot then less of the energy in our food is available for a hypothetical predator.

10. Biomass Pyramids
Bio = life Mass = Amount of stuff (kg)

11. Use this to describe the difference between the two types of pyramid ready to do exam question that follows.

12. The diagram shows a pyramid of numbers for this food chain.
a) draw a pyramid of biomass for this food chain.
Do not label unless you are asked to label it! Incorrect labels will lose you marks!

13. Interdependence
Mutualism – A relationship where both organisms benefit. Examples: Oxpecker and buffalo Crocodile and crocodile bird Parasitism: Parasites are organisms that live on or in a host organism. The parasite benefits from this arrangement, but the host suffers as a result. Examples: Mistletoe growing on trees Plasmodium (malaria) Tapeworm

14. Exam Question
The photograph shows a crocodile holding its mouth open to allow a crocodile bird to feed.
This type of symbiotic relationship between two organisms is known as what? (1 mark)
2.  Suggest why this relationship is beneficial to the crocodile.