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  • White light =mixture of colours
  • This is showed when white lighthits a prism = light gets dispersed (split up) into a full rainbow =SPECTRUM
  • Frequency of light = number of complete waves that pass a point per second
  • Light waves increase in frequency from red to violet
  • Filters only allow one particular colour (the colour of the filter) of light to go through it
  • Other colours = absorbed = don’t get through
  • Coloured objects = reflect only their colour
  • White objects = reflect ALL colours
  • Black objects = absorb ALL colours
  • In coloured light = objects seem to change colour

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.



Use the appropriate words in the missing gaps.

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……?’








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