A crane had DDT level as 5 ppm in its body. What would happen to the population of such birds?
Explain giving reasons.

What is the effect of temperature on the rate of reaction ? Explain giving reasons.

IF a magnetic compass and a dip circle are taken to the magnetic poles of the Earth, what would be the directions of their needle ? Explain giving reasons.

Large scale cultivation of Spirulina is highly advantageous to human population. Explain giving two reasons.

A population of Paramecium caudatum was grown in a culture medium. After 5 days the culture medium became overcrowded with Paramecium and had depleted nutrients. What will happen to the population and what type of growth curve will population attain? Draw the growth curve.

What is the effect of temperature on the rate of a chemical reaction? Explain giving reasons.

The velocity of a body is doubled. What happens to its momentum?

What will happen to the K.E oa a body if its momentum is doubled ?