Starter task: Open the light or heavy powerpoint document and click 'Slideshow' at the top, then click 'Play from start'.
Work your way through the questions, look carefully to see if it is asking you for the heaviest or lightest object.
Main task: Open the word document below and tick the heaviest object in each box. Answer the questions at the bottom of the sheet and then colour in the pictures.
If you haven't got a printer, maybe you could have a go at drawing the heaviest object from each box into your book.