Available Answers

1. 1.

   How was earth formed?

2. 2.

   Draw a diagram to show the structure of the earth.

3. 3.

   Fill in the blanks in the following sentences:

   1. Earth is about _____________ billion years old.
   2. Centre of the earth is called _____________.
   3. The molten minerals under the earth's surface are called _____________.
   4. Lava comes out of weak spots in surface of earth and _____________ are formed.
   5. Volcanoes are found in _____________ and _____________ oceans.
   6. Cooling of Lava results in formation of _____________ rocks.
   7. _____________ rocks are formed from pebbles and mud washed down by water.
   8. _____________ rocks are formed by effect of pressure and heat an igneous and sedimentary rocks.
   9. Shale is a _____________ rock.
   10. _____________ is also called black gold.
4. 4.

   What is a volcano?

5. 5.

   Draw an erupting volcano.

6. 6.

   Define the term Igneous Rocks.