Atoms and Molecules — Science STD 9 — Question

Some animals get disturbed and start running here and there just before the earthquakes occur because they can hear______________?

All matter that is present in the universe has:

A boy is sitting on a merry-go-round which is moving with a constant speed of 10 ms^-1. This means that the boy is:

Find the correct statement:

The force of attraction between two unit point masses separated by a unit distance is called

A particle is moving with a constant speed along a straight line path. A force is not required to:

Earth goes round the SUN with:

One small crystal of potassium permanganate can colour large volume of water. This proves that ____________:

An elevator with load, weighing 500kg is moving up with a velocity of 0.2ms. The power of the motor in horse power is (1H.P. = 746 watt):

Find out the correct sentence.

1. Hybridization means crossing between genetically dissimilar plants.
2. Cross between two varieties is called as inter-specific hybridization.
3. Introducing genes of desired characters into a plant gives genetically modified crop.
4. Cross between plants of two species is called as inter varietal hybridization.

1. (i) and (ii)
2. (ii) and (iv)
3. (ii) and(iii)
4. (iii) and (iv)