Natural Sciences and Technology Grade 6 Term 4

Natural Sciences and Technology Grade 6 Term 4: Planet Earth and Beyond Movements of the Earth and Planets (ppt 2)

Topic 2 Movements of the Earth and Planets Rotation and Revolution [part 2] Natural Sciences and Technology - Grade 6

Riding in a bus • It seems that the trees and houses are moving. • Likewise, it is not the Sun that is moving, but the Earth that is moving around the Sun. Natural Sciences and Technology - Grade 6

How day and night happens • Position yourself so that the light of the Sun shines on your face. • Turn to your left very slowly. Look to the Sun’s bright light. As you move to your left, the Sun moves to your right. • Step back and you will notice that the Sun “moved lower” on your right cheek. • Turn left and notice that the Sun “rises” over your left cheek. [It illustrates sunrise]. • Turn around with your back facing the Sun. [It illustrates night]. Natural Sciences and Technology - Grade 6

How day and night happens Natural Sciences and Technology - Grade 6

Earth’s revolution • The Earth orbits the Sun at a speed of 108, 000 km/h. • It revolves(rotates) on its axis once every 24 hours or once a day. • The Earth’s daily position is never the same. • It either moves further away from the Sun or closer to it. • The Earth’s rotation speed affects the Earth’s currents, climate, shape and ocean depth. Natural Sciences and Technology - Grade 6