Table of Contents
Week 1 | KS3 Physics
Week 2 | KS3 Physics
Week 3 | KS3 Physics
Week 4| KS3 Physics
Week 5| KS3 Physics
Week 6| KS3 Physics
Week 7| KS3 Physics
Wind, Solar and Geothermal
- These are examples of renewable energy resources
- Wind farms = lots of wind turbines in exposed places
- Each turbine has a generator = rotating blades turn generator = electricity produced
- No pollution
- Spoil the view as lots of wind turbines needed to replace non-renewable energy resources
- Can be very noisy
- Impossible to increase supply of energy when in high demand as wind may stop blowing
- Initial costs are high
- No fuel costs and minimal running costs
- No permanent damage to the landscape if turbines are removed
- Solar cells = generate current directly from sunlight . (ideal for watches and calculator batteries as don’t require a lot of electricity)
- Often used in distant places
- No pollution (but lot of energy required to manufacture firstly)
- They are only reliable in the daylight
- Can’t increase energy supply when there is a high demand
- Like wind farms, initial costs are high but after running costs arelow and the energy is free
- Geothermal power= energy in underground thermal energy stores
- Possible in areas which havehot rocks near to the surface or in volcanic areas
- Source of energy = slow decay of radioactive elements deep inside the earth
- Free energy, which is reliable and do not damage the environment a huge amount
- They can directly generate electricity or heat buildings
- But, aren’t very many suitable locations
- Cost is high to build a power plant
How long have you…? (present perfect 4) Exercises
Use the information given to create questions beginning with ‘How long…?’
• It is snowing.
• The weather is shining.
• John and Kate are married.
• My brother has gone on holiday.
• My aunty and uncle live in Canada.
• My sister is a teacher.
• I work at the chemist.
• I’ve known Susan since I was a baby.
• Jonathan is learning to speak to Mandarin.
Fill in the missing gaps in the sentences using the present perfect (=has/have + past participle)
• I have known Kate a long time.
• My brother has been playing the piano he was 11 years old.
• My mum and dad on holiday to America. They
gone since last Sunday.
• I Ben and Emma since primary school.
We to the same primary and secondary school.
• My sister learning to speak French because she
is going to France next month.
have you lived lives to
has been works have known
I have bought have worked.
• My sister in Spain. She is studying Spanish
with her friend Rosie. I Rosie since I was 5.
• Spencer like with Jamie. They have worked
together for 2 years.
• How long in Australia?
• a new dress for prom.
• He to Thorpe park.
Challenge: Create 4 of your own questions beginning with ‘How long……?’