Available Answers

1. 1.

   Choose the correct answer.

   1. The building blocks of all the rocks are
      1. pebbles
      2. sand
      3. soil
      4. minerals
   2. The rocks formed by the cooling and hardening of lava are
      1. sedimentary rocks
      2. metamorphic rocks
      3. igneous rocks
      4. fossils
   3. The rock mainly comprises quartz, mica and feldspar is
      1. pumice
      2. basalt
      3. granite
      4. limestone
   4. The traces of animals and plants in the layers of sedimentary rocks are called
      1. sandgrains
      2. fossils
      3. lav
      4. fossil fuels
   5. metallic minerals are obtained from their
      1. ores
      2. sediments
      3. fossils 
      4. fuels
   6. Coal ans petroleum are called
      1. nuclear fuels
      2. domestic fuels
      3. fossil fuels
      4. renewable fuels
   7. Metamorphic rocks are formed due to change in
      1. physical structure
      2. heat and pressure
      3. colour
      4. density
   8. The energy stored in coal and petroleum is
      1. solar energy
      2. atomic energy
      3. colour
      4. density
   9. Which of the following products is not obtained from petroleum?
      1. cosmetics
      2. gold
      3. plastic
      4. fertilizers
   10. The metamorphic rock made from granite is
       1. slate
       2. marble
       3. gneiss
       4. quartz
2. 2.

   Name the substance by which all rocks are made.
3. 3.

   What is the outermost layer of the earth called?
4. 4.

   Name the igneous rock formed by quick cooling of lava on the earth's surface.
5. 5.

   Which rock is formed when gravel, pebbles and stones get cemented together by minerals?
6. 6.

   On what basis rocks are classified?