Available Answers

1. 1.

   Choose the correct option.

   1. A natural resource obtained from plants is
      1. ore 
      2. iron
      3. argon
      4. fibre
      5. shale
   2. Molten liquid rock found deep below the surface of the Earth is
      1. ozone
      2. magma
      3. manganese
      4. sapphire
      5. coal
   3. Coal is formed from
      1. clay
      2. dead plants
      3. recycled material
      4. sand
   4. The most important gas for human is 
      1. carbon dioxide
      2. nitrogen
      3. oxygen
      4. helium
      5. neon
   5. An example of a non-biodegradable thing is
      1. a neem tree
      2. paper
      3. cardboard
      4. brass
      5. flower
   6. A lot of light can pass through objects that are
      1. luminous
      2. opaque
      3. translucent
      4. transparent
      5. shiny
   7. Lunar eclipses occur
      1. rarely
      2. every morning
      3. every evening
      4. once a year
   8. A solar eclipse occurs when
      1. the moon passes between the sun and the Earth
      2. the Earth passes between the moon and the sun
      3. the sun passes between the moon and the Earth
   9. Light travels at a speed of 
      1. 3 km/sec
      2. 30,000 km/sec
      3. 300,000 km/sec
      4. 3,000,000 km/sec
2. 2.

   Fill in the blanks.

   1. The gas __________ is used in some electric lights.
   2. Plants take in __________ from the soil.
   3. Water vapour in the atmosphere creates weather conditions such as __________, __________, __________, and __________.
   4. In a __________ place the skin feels sticky with perspiration.
   5. Some fuels contain __________, which combines with the nitrogen in the air to form __________ __________.
3. 3.

   Name the following.

   1. A natural resource from the air.
   2. Te process by which plants make food in sunlight:
   3. A biodegradable waste:
   4. A non-biodegradable waste:
   5. A mineral:
   6. The layer between the troposphere:
4. 4.

   What are some of the natural resources found on Earth?
5. 5.

   What is the lower atmosphere called?
6. 6.

   In which direction does air press on things?