You might have seen an electrician while using the screwdriver.
What materials does it contain?

You might have seen an electrician while using the screwdriver. Why does a screwdriver used by electricians not have metal handle?

What does our breath contain?

You might have heard people saying "my sight is increased or decreased". What does it mean ?

What properties does a proton have?

The material used in solar cells contains

Have you seen a periodic table ? Yes.

What are used as preservatives while making pickles?

Very often you must have seen traffic police catching motorists and scooter drivers who drive fast and fine them. Does fine for speeding depend on average speed or instantaneous speed ? Explain.

What are outside raw materials used for by an organism?