Available Answers

1. 1.

   Multiple Choice Questions (MCQs). Tick (√) the right option:

   1. __________ is all around us.
      1. Air
      2. Water
      3. Plants 
      4. None of these 
   2. Water impurities are of __________ types.
      1. One 
      2. Two
      3. Three
      4. Four
   3. Ecosystem can be __________ or petite.
      1. Fast
      2. Blast
      3. Vast
      4. None of these
   4. __________ is the thin layer of material.
      1. Soil
      2. Plants
      3. Water
      4. Sand
2. 2.

   Fill in the blanks with the given words:

   evaporation

   sunlight

   plants

   liquid

   1. __________ provides shelter for animals.
   2. __________ is a portion of the electromagnetic radiation given off by the sun.
   3. Changing of water into vapour is called __________.
   4. Water is the most important __________ on earth.
3. 3.

   Write 'T' for true or 'F' for false:

   1. Air is a mixture of gases.
   2. Animals depends on air for food.
   3. Food chain starts with secondary source.
   4. Soil formation is influenced by organisms.
4. 4.

   What is food chain?
5. 5.

   How animals depends on plants for shelter?
6. 6.

   What are properties of air?