How can you say that mouth is a munching machine ?

How can you say that rusting is a chemical change? What factors are favourable for speed rusting?

HCl is reacting with zinc granules. How can you say that it is an exothermic reaction ?

Silver atom has completely filled d-orbitals (4d^(10)) in its ground state. How can you say that it is a transition element ?

How can you say that a tree is living thing even though it doesn’t move?give reasons

How can you say that a body is in motion? Is it a common property? (AS_(1))

How can you say that forests are lungs of our earth ?

How can you say that your backbone behaves like a spring?

How can you say that milk is a colloid or colloidal solution?

How can you say that a potato is stem although it grows under the ground ?Think it over .