Worksheets › Class 4 › How Things Work
Class 4 How Things Work worksheet
CBSE Science. Spinning coins, tops and spinners, balance, colour spinners, floating and sinking, shape and material, toy boats. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
A spinning coin starts to shake when it:
- is first spun
- is lifted up
- speeds up
- slows down
Answer
(d) slows down
- 2.
Which of these FLOATS on water?
- candle
- steel spoon
- potato
- key
Answer
(a) candle
- 3.
Which of these SINKS in water?
- cork
- plastic ball
- leaf
- potato
Answer
(d) potato
Section B · short answer
- 4.
Name four things that can spin.
Answer
Any four: a coin, a bangle, a top (lattu), a ceiling fan, a potter's wheel, a bicycle wheel.
- 5.
Write "float" or "sink": (a) potato (b) stone
Answer
(a) sink (b) sink
Section C · long answer
- 6.
How do you make a cardboard spinner? How can you test what makes it spin best?
Answer
Cut a circle of cardboard, push a toothpick through its centre and spin it. Test by moving the toothpick away from the centre, changing the shape (square), or the toothpick length, and see which spins longest and most steadily.
Fresh sheets for your child
In the app, every How Things Work sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.