A milkman uses a weighing machine to measure the quantity of milk. 

Write names of any two energies produced in ocean.

Which of the following are physical changes?

(a) Melting of iron metal        (b) Rusting of iron

(c) Bending of an iron rod     (d) Drawing a wire of iron metal

Write down the two benefits of use of solar energy.

Fill in the blank with a suitable number

$(1000/100)$ _____ millilitres $\left(\mathrm{ml}\right) = 1$ litre‌ $\left(\mathrm{l}\right)$.