Question

Rocks, soil, mountains and the hot interior of Earth together form the

A volcano erupts and throws huge amounts of ash into the air. The ash blocks sunlight, and crops nearby grow poorly. Which order shows how the spheres were affected?

Which of the following is not an effect of cutting down forests on a large scale?

Assertion (A): The ozone layer has become thinner in some places, mainly because of chlorofluorocarbons (CFCs). Reason (R): CFCs are given out naturally by green plants during photosynthesis.