Energy flows

Today we're going to look at the other Biology material we need to cover for this half term. Answer the following in your books:

1. What is biomass?
2. Explain where the energy in most foodchains originally comes from:
3. What reaction produces energy in living cells? Where does this reaction occur?
4. Name four ways in which an organism can lose energy so that it isn't available higher up the food chain:
5. What organisms carry out decay?
6. What conditions are needed for decay to occur?
7. Briefly explain how carbon can travel from the atmosphere into the bird, through the soil and back to the atmosphere again.
8. How much energy is needed to produce a steak?
9. How would this change if the animal was intensively farmed?
10. Watch this video, and explain why this body DIDN'T decay:
11. Try this activity. Is there one way or more than one way for carbon to cycle?

Metals

Today we're going to do some work with transition metals and review the section you have looked at with Ms. Elias.  Answer the following in your books:

1. Where are transition metals found in the period table?
2. What are some properties that they share?
3. What is an alloy? Give some properties of one alloy from the table:
4. In what two ways do metals differ from one another?
5. Give one thing that all metals have in common:
6. Go to kerboodle, and log in to find the materials in the 'co-ordination and control' assignment. Start working through these to prepare for the progress test. You should start with the 'ups and downs of life' section, as the practical didn't work too well in class.

Biology 2.3 - Enzymes

We're going to start the nesxt topic section today, looking at enzymes and their roles in the body. Answer the following questions in your books:

1. What is a protein made from?
2. List two ways that proteins can differ from one another:
3. What do enzymes do in the body?
4. Can any enzyme act on any molecule? Use the scientific term to describe this.
5. List two factors that influence how well an enzyme works:
6. Watch this animation. Give the name of a digestive enzyme and explain where it is produced in the body.
7. Briefly explain what the other two enzymes from the table are, and what they break down.
8. Watch the video below, explaining what the active site is:
9. Why would enzymes that work in the stomach be able to tolerate a very low pH?
10. Complete the handout with exam style questions from Mr. Cole. This will be homework, which you should mark yourself and bring back to class.