Chapter -1

Know your planet

Back exercise question

Question 1: How was it proved that the Earth is spherical in shape?

Answer 1: Ferdinand Magellan first sailed around the world and proved that the Earth is round. Pictures taken from space have also proved that the Earth is like a sphere.

Question 2: How is a globe useful to us?

Answer 2: The globe shows the distribution of land and water on the surface of the Earth. The correct shape, size and location of continents and oceans on the Earth can also be seen on a globe.

Question 3: How do maps help us? Why is a map less accurate than a globe?

Answer 3: Maps are drawn on a flat surface. We can show continents, countries, cities and neighborhoods on a map.

Maps cannot Be used to show the spherical Earth because curved surfaces cannot be shown accurately on a flat surface. That is why a map is less accurate than a globe.

Question 4: What are the features that help us to read a map?

Answer 4: The four features which help us to read a map are

1. Directions

2. Scale

3. Symbols

4. Colors

Think and answer:

Question: The Earth looks mostly blue when seen from space. Why?

Answer: The Earth looks blue from space due to the presence of water bodies.