Fill ups
First Earth Summit was held at…………..and aimed at…………….. .

Write 'True' or 'False': First 'Earth Summit' was held at New Delhi.

When and where was Earth Summit held?

Fill ups Ozone layer lies at a height of about………………….to………………from the surface of earth.

Fill ups When the succession is arrested and held indefinitely at the stage perceding the climax, it is termed as…………. .

Fill in the Blanks Rotation of earth around its own axis is ............... .

Fill in the blanks The total number and types of organisms present on the earth constitute……………….. .

Why the Van de Graaff generator is enclosed inside an earth connected steel tank filled with air under pressure?