The Universe And The Earth 7th Class Pdf Fixed -

From the outside, Earth looks like a blue marble. But inside, it’s still restless. The crust is broken into giant puzzle pieces called . They float on the hot mantle, grinding together to build mountains, pulling apart to create valleys, and causing earthquakes.

One of those planets was .

: Often called an oblate spheroid , Earth is slightly flattened at the poles and bulges at the equator. the universe and the earth 7th class pdf