Section 1 revision

We will sit the section 1 paper for the ISA on Tuesday, which will be about experimental design.  Make sure you understand the following points:

1. Read through the notes on experimental design, making sure you know what accuracy, reliability and range mean in relation to an experiment. Writing dot points or definitions will help you.
2. Make sure you know what independent, dependent and control variables are (in general and for our maggot experiment) off by heart. Write these down once more even if you know them.
3. Finally, and most importantly, you will need to be comfortable with all the terms on this AQA website. Read through them, writing down any you aren't sure about so that you can ask Miss Chandarana or myself before Tuesday.

Finally, good luck! Email me if you have any questions, otherwise see you Tuesday.

ISA planning

Today we're going to fill out the planning sheet for the ISA next week. The hypothesis is -

'The distribution of invertebrates in a habitat depends on the light intensity.'

Use these links for your research, and fill out all the boxes on the sheet this lesson.

• Similar experiment using choice chambers.
• Similar experiment using maggots (Calliphora).
• Good explanation of phototaxis.

ISA

The NEW ISA is going to deal with small invertebrates choosing between different conditions. Answer the following to help gain the infromation you need to prepare yoursleves:

1. What is a choice chamber?
2. What did Lorentz and Pavlov do (use link from 1)?
3. Briefly describe the three parts of a fly's life cycle:
4. What happens when you shine a bright light near maggots? How do they sense the light?
5. What would your dependent variable be for this experiment (bottom of the page)?
6. Read the abstract from this essay. What is the independent variable here?
7. Watch this video. Which habitat did the spider prefer? Did it have an equal opportunity to go into ALL habitats?




8. Look at the diagram below. What control variables were met in this experiment? What was one that wasn't?                        



The experiment was started at A, halfway through at B and finished at C.



9. This link has notes and a method for a similar experiment to what we will do. Why is it important that the room can be blacked out?

10. What choices do the Monkeys on this beach have? Describe what would need to change for this to be a fair test about Monkeys' drink preference:                             

Planning ISA

The hypothesis you need to write onto your planning sheet is:
'The surface area of water in contact with air effects the rate of cooling.'
Once you've written it in, plan the rest of your experiment using the spaces on the sheet.

ISA preparation

Today we're going to keep preparing for the ISA which we'll be doing next week. Answer the following in your books:

1. What is the independent variable?
2. If we were looking at rates of cooling in different coffee cups, what would be the independent?
3. What would our dependent variable be for the same experiment?
4. Name 5 control variables that we would need to keep:
5. Where should the independent and dependent variables go in a table? What about in a line graph?
6. For the graph below, what effect does the volume of water have on the rate of cooling?
7. For the graph, which container material had the slowest rate of heat loss?
8. State the independent and dependent variable in this experiment:
9. Watch this animation, stating the three ways that heat can be transferred:
10. What would be a good colour to paint a bottle to help it keep heat better?
11. What is another name for thermal radiation?
12. LIst two factors that can affect condensation or evaporation:
13. What happens to the kinetic energy in the ice blocks here when warm water is poured on them?