Page 122 - Knowledge Organiser Yr9 24-25

Knowledge Base: Science Working scientifically Year 9
8. Command words
Calculate
Use numbers given in the question to work out the answer.
Compare
Describe the similarities and/or differences between things, not just write about one.
9. Equations needed for Y9
kinetic energy = 0.5 × mass × (speed)2
elastic potential energy = 0.5 × spring constant × (extension)2
gravitational potential energy = mass × gravitational field strength × height
Ep = m g h
Power = energy transferred ÷ time
P = E÷ t
Power = work done ÷ time
P = W÷ t
Efficiency = useful output energy transfer ÷ total input energy transfer
Efficiency = useful power output ÷ total power input
charge flow = current × time
Q= I t
potential difference = current × resistance
V= I R
power = potential difference × current
P = VI
power = (current)2 × resistance
P = I2 R
energy transferred = power × time
E= P t
energy transferred = charge flow × potential difference
E= Q V
Define Specify the meaning of something.
Design Set out how something will be done.
Determine Use given data or information to obtain and answer.
Describe
Recall some facts, events or process in an accurate way.
Evaluate
Use the information supplied, and your own their knowledge and understanding, to consider evidence for and against when making a judgement.
Explain
Make something clear, or state the reasons for something happening, using scientific evidence.
Justify
Use evidence from the information supplied to support an answer.
Plan
Write a method. Use ‘bossy’ words to logically sequence the steps of the experiment. State what equipment will be used. If asked to describe how you would make it a fair test, state what you need to control (keep the same).
Show Provide structured evidence to reach a conclusion.
Suggest
Apply their knowledge and understanding to a new situation.
Use
The answer must be based on the information given in the question. You might be asked to use their own knowledge and understanding.
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