The drawing shows an apple falling to the ground. A flat surface is gradually pushed up into higher and higher mountains until the Earth is covered with mountains. High mountains gradually wear down until most of the Earth is at sea level. High mountains gradually wear down as new mountains are continuously being formed, over and over again. High mountains and flat plains stay side by side for billions of years with little change.
Air is made up of many gases.
The Earth rotates on its axis. The Sun rotates on its axis. The Earth's axis is tilted. The Earth revolves around the Sun. The diagrams show different trials Abdul carried out with carts having different-sized wheels.