The document provides revision work and homework assignments related to environmental science topics. It includes quizzes on why Earth is called the Blue Planet, the four major elements of the environment, the definition of biodiversity, and two ways humans are disturbing the natural environment. It also includes quizzes on the definitions of weathering, humus, major soil types in India, residual soil, and denudation. Finally, it lists homework assignments to prepare for upcoming revision tests in geography, history, and civics.

1. REVISION WORK
 BASE D ON THE FOLLOWING CHAPTERS:
1. COMPONENTS OF ENVIRONMENT
2. EARTH AND THE CHANGES ON IT

2. QUIZ-COMPETITION
 WHY IS THE EARTH ALSO CALLED THE
‘BLUE PLANET’?
 NAME THE FOUR MAJOR ELEMENTS OF
THE ENVIRONMENT.
 WHAT IS ‘BIODIVERSITY’?
 EXPLAIN TWO WAYS IN WHICH HUMAN
ARE DISTURBING THE NATURAL
ENVIORMENT.
 WHAT DO YOU MEAN BY SIMA AND SIAL?

3. QUIZ-COMPETITION
 WHAT IS WEATHERING?
 WHAT IS HUMUS?
 WHAT ARE THE MAJOR SOIL TYPES
FOUND IN INDIA ?
 WHAT IS RESIDUAL SOIL ?
 WHAT DO YOU MEAN BY DENUDATION ?

4. HOME WORK
 PREPARE FOR REVISION TEST OF THE
FOLLOWING CHAPTERS :
 GEOGRAPHY- 1 AND 2 (10-09-12)
 HISTORY- 9 AND 10 (11-09-12)
 CIVICS- 18 AND 19 (12-09-12)