01. Travelling light
How does light travel?
Activity - complete the two diagrams by drawing rays of light on them in the appropriate places
Activity - Investigating shadows
Q: What affects the size of a shadow?
You can investigate the variables that could affect the size of a shadow using a lamp, a piece of card and a screen
Variables that you could investigate include:
· the size of the card
· the distance between the ray box and the card
· the distance between the ray box and the screen
· the distance between the card and the screen.
Write a plan for your investigation. Remember to:
· say which variable you are going to investigate
· say which variables you are going to keep the same
· predict how changing your variable will affect the shadow, and give a scientific reason for your prediction (Hint: Drawing accurate scale diagrams will help you to make a prediction)
· describe how you are going to carry out your experiment
· explain how you will keep yourself and others safe while you are working
· explain how you will make your results as accurate and reliable as possible
· say what you are going to record as your results and how you are going to record them
· say how you will display your results
· say how you will make sure that you have enough results to draw a conclusion.
Can you...
> plan and carry out a fair investigation
> make a prediction using scientific ideas