Available Answers

1. 1.

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

   1. Greenhouses are used to grow plants in 
      1. Summer
      2. Winter
      3. Rain
      4. None of these
   2. Greenhouse is made of __________ or glass.
      1. Plastic
      2. Grass
      3. Plant
      4. None of these
   3. Land, oceans and plants absorb or soak up energy from
      1. Sunlight
      2. Moon light
      3. Air
      4. None of these
   4. __________ is everything that is all around us.
      1. Nature
      2. Environment
      3. Soil
      4. All of the above
   5. Global warming is rise the temperature of the Earth's surface.
      1. Average
      2. High
      3. Low
      4. None of these
2. 2.

   Fill in the blanks with the given words:

   deposition

   methane

   increase

   molecules

   trees

   1. We should plant more __________.
   2. Ozone is a gas made up of __________.
   3. Carbon-dioxide, __________ and water vapour are the main greenhouse gases.
   4. Global warming is steady __________ in temperature of the Earth's surface.
   5. Acid rain is a type of __________.
3. 3.

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

   1. Cow is a natural resource.
   2. Oxygen is a greenhouse gas.
   3. Pollution is beneficial to health.
   4. Global warming leads to melting of ice in north and south poles.
   5. Deforestation is a major cause of global warming.
4. 4.

   Explain the 'Greenhouse effect'.
5. 5.

   How does global warming affect us? Give two reasons.
6. 6.

   What is ozone layer?