GCSE Science
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# P2.10 Velocity-time graphs & acceleration -

How can a graph show changes in an objects velocity?

You may want to recap distance time graphs from year 10; then check out this video https://www.youtube.com/watch?v=9LQdLDDEJ1g

All Saints Science's insight:

Watch the video clip and answer the following questions,

1. How can you calculate average speed.

2. What does a horizantal line mean on a velocity time graph

3. How do you calculate the acceleration from a velocity-time graph.

4. What are the units for acceleration.

5. What does negative acceleration mean?

6 How do you find the distance travelled from a velocity-time graph

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# GCSE Science

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## P2.30 - Half Life

All Saints Science's insight:

Complete a grade 'A' mindmap on the contents of the video

1.Write a definition of 1/2 life  (25 words maximum)

2.What do we measure radioactivity activity with?

3.If the initial activity is 800 decays / second what will the activity be after one half-life?

4. What would the activity be after 3 half lives (show your workings)?

5. Sketch the shape of a radiactivity chart . On this graph show how you can find the 1/2 life. (it may help to add values to the axis -  (y-axis number of nuclei , x-axis time).

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All Saints Science's insight:

Watch the above Video

1. State the three types of Nuclear radiation.

2. Describe how each type is structured...what are they simular too?

3. Rank them in terms of Mass (largest mass 1st)

4.Compare them in terms of their abilities to penetrate

5.Compare them in terms of their ability ionise.

6. What does ionise mean? Where have you met this before.

7. Why do we refer to these types of radiation as Nuclear radiation?

8. What can stop each type of radiation

Extra information:

http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel/electromagnetic_spectrum/electromagneticspectrumrev5.shtml

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## 2.7 Transferring Energy

A video lesson covering electrical power and how this applies to fuses, and also how to calculate energy transferred by a device

All Saints Science's insight:

1.Watch the attached video on transfering energy  ensure that you attempt all example calculations within the video ( you will need to evidence this). Additionally you will need to answer the following questions.

2. Put into words the equation  P = I x V

3. What are the standard units for each item in the equation?

4.Put the formula into a formula triangle and rearrange the equation for  I and V.

5.What is the job of a fuse. How does it do this?

6. For a 0.8 KW appliance what size fuse would you use (remember supply voltage in the UK is 230V)?

7. What is the equation for energy transferred in an electrical circuit? Rearrange for each component of the equation.

8.What is the unit for energy?

9. Calculate the energy transferred for an Oven that draws an average current of 15 Amp for 2 hours from the 230V supply.

10. Calculate the current that an appliance draws, using a 12V supply if the energy transfered  in 1 hour  is 129.6KJ.

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## P2.2 - Static Electricity

This video explains what static electricity is and how it affects our lives.
All Saints Science's insight:

Watch the attached video and make a detailed mindmap of the learning involved. As a minimum your mindmap must include.

1. A model of an atom show where the charge particles are;

2. The rules of attraction/repulsion of charge particles

3. Applications of static electricity and how they work

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## P2.4 -What is Potential Difference?

This is the 1st lesson in the series, "Potential Difference and Resistance." The lesson defines potential difference and volt. Source: Mindset Network
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## Nuclear Reactor

Nuclear Reactor - Understanding how it works

All Saints Science's insight:

Complete a grade 'A' mindmap on the contents of the video

1.Identify what a Nuclear Power station have in common with a conventional power station.

2.What is different? In a Nuclear Power station

3.what is the function of the (1) Fuel rods, (2) Control Rods ,(3) Moderator

4.Why are the control rods moved (1)further into the reactor core and (2) Out of the core

5.What would happen if there was no moderator in core? explain why

6.Draw a flow diagram (energy transfer diagram) to show how nuclear energy is transformed to electrical energy

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## P2.10 Velocity-time graphs & acceleration -

How can a graph show changes in an objects velocity?

You may want to recap distance time graphs from year 10; then check out this video https://www.youtube.com/watch?v=9LQdLDDEJ1g

All Saints Science's insight:

Watch the video clip and answer the following questions,

1. How can you calculate average speed.

2. What does a horizantal line mean on a velocity time graph

3. How do you calculate the acceleration from a velocity-time graph.

4. What are the units for acceleration.

5. What does negative acceleration mean?

6 How do you find the distance travelled from a velocity-time graph

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## P2.5 Physics - Potential Difference and Resistance: Circuit Calculations

This is the 8th lesson in the series, "Potential Difference and Resistance." The lesson shows how to draw a circuit diagram showing the arrangement of resist...
All Saints Science's insight:

1.Watch the attached video on Potential Difference and Resistance:  ensure that you attempt all example calculations within the video ( you will need to evidence this). Additionally you will need to answer the following questions.

You need only watch upto 7minutes 30 seconds of the video

2. Put into words the equation  V = I x R

3. What are the standard units for each item in the equation?

4. What piece of equipment do you use to measure V and I

5. Put the formula into a formula triangle

6. Rearrange the equation for  I and R

7. In a series circuit what is the relationship between the input voltage from the battery/power pack and the voltage output from each component. Can you put this into a formula?

8 Draw a simple diagram showing a battey and a lamp, show how you use measuring equipment to measure the voltage and the current of the lamp.

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## P2.3 Physics - Introduction to Electric Current: The Coulomb and Using Q = I.t

"Introduction to Electric Current." This lesson investigates the meaning of a coulomb of charge. It defines a coulomb ...

All Saints Science's insight:

1.Watch the attached video on Electric Current ensure that you attempt all example calculations within the video ( you will need to evidence this). Additionally you will need to answer the following questions.

2. Put into words the equation  Q = I x t

3. What are the standard units for each item in the equation?

4. Put the formula into a formula triangle

5. Rearrange the equation for  I and t

6. What is the definition for a coulomb?

7. What is an electric current?

8. What is the difference between direct and alternating current

9. A German Scientist might write the equation relating charge and time like this:  Landung = Strom x Zeit

Explain why scientists usually replace words in equations with symbols?

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