Plant Oils

Today we're going to look at the Plant Oils section of Chemistry for the progress test next week (in the second half of Ms Elias' lesson on Thursday). Answer the following in your books:

1. Explain how distillation can be used to produce plant oils:
2. What other method can be used to extract oils from plants? Briefly explain the steps involved:
3. What are the differences between saturated and unsaturated oils?
4. Watch this animation. What four parts make up a molecule of sunflower oil?
5. Why are oils useful in cooking?
6. What is an emulsion?
7. Explain what 'hydrophilic' and 'hydrophobic' mean:
8. Name three foods that use emulsifiers:
9. Why do we need vegetable oils in our diet? What are some problems associated with over consumption of them?
10. The progress test next week will be on everything we have covered (in both classes) so far this year, but with more time for the material covered since christmas. Go through your books and identify one topic you're comfortable with, and one which you want to start revision on. Write these down.
11. Go to the bitesize website, and write down one thing you learn about the topic you are least confident about.

Today we will be looking at how plants and animals are adapted to survive in different conditions.  Answer the following questions in your books, using the links to help you:

1. What things do plants need to survive and reproduce successfully? 
2. How do animals take in energy from the environment? Think of one example of an animal being adapted to do this better:
3. Explain what 'heterotroph' means.
4. Watch this video, and give the main resource that the plants are competing for:
5. Outline the adaptations that antarctic fish have that help them survive. - What is an extremophile?
6. Name one extremophile organism and where it lives. 
7.  List three things that animals compete for:
8. Complete this activity and give the biological definition of a community.
9. What is competition between organisms? 
10. Do organisms like plants or animals always compete for the same resources? Explain why:
11. When does competition occur between organisms (what conditions need to happen?)?
12. When individuals are in competition, which ones are the most likely to survive? 
13. Try this game. What helps a population survive longer? 

E.M. spectrum

Today we're going to summarise the E.M. spectrum work we've been doing so we're ready for next term. Answer the following in your books:

1. What are fibre-optic cables? What are they made form and what energy do they transmit?
2. What dangers have been linked to mobile phones and the electromagnetic spectrum? What have scientistts found?
3. Use the diagram below to explain which visible colour has the longest wavelength:                              
4. What is the Doppler effect?
5. Use the video below to describe how sound and light are both influenced by the Doppler effect:


6. Who used evidence from other galaxies to come up with the Big Bang theory? Briefly describe what the theory states:
7. Use the information above to explain why some of the galaxies in this picture appear red. Why are some more red than others?                                                                     
8. If redshift is one piece of evidence for the big bang theory, what is the other main piece of evidence that supports the Big Bang theory?
9. Try this activity.
10. Extension - Read about the theories regarding a big crunch or big yawn (click on 'the big bang' in the index and then scroll down). Briefly describe what each one states.

Sound and light waves

Today we're going to keep looking at sound waves, and start to look at how light waves work too. Answer the following in your books:

1. What is the approximate range of human hearing? Remember to include units.
2. What is one difference between sound and light waves?
3. Explain what separates the different parts of the electromagnetic spectrum. The image below may help:                                                                          
4. How are microwaves used in comunication?
5. Define diffraction, and give one real life situation where it occurs.
6. What two things influence the amount of diffraction?
7. Watch this video, showing a non-newtonian fluid on top of a speaker. What type of sound waves seem to have the greatest effect on the fluid? Try to use scientific terms from class in your answer.
8. How is the normal line drawn in relation to this mirror? Can you give the law of reflection?
9. How are relfection and refraction different? Think about the angles you have seen today: 
10. Extension - Why is refraction important for you to see things? Use the image below to help you:

Term 2 preparation

Next term we are going to start doing your ISA, a practical exam which makes up 25% of your grade for this year. Answer the following questions to help you get ready for it:

1. What is the independent variable?
2. What is the dependent variable?
3. Where should the independent and dependent variables go in a table? What about in a line graph?
4. What have you enjoyed about science this term?
5. What would you like to change or do differently?
6. See how long it takes you to find these keywords. Can you explain what they all mean to the person next to you?
7. Try any of the science crosswords from the New York Times.
8. Watch this interactive (click on 'what is a trait?' on the left). What parts of our bodies influence the traits that we have?
9. Complete any of the other activities on this website, or try and of the old links on this page.

Revision

Use this document to revise for the bio section of the upcoming progress test.

Revision/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.