Why are the Humid tropics located where they are? The Sun-Earth relationship.(Key Concept) Heating of the Earth: Heat Absorption from the Sun’s Heat Rays http://www.ehow.com/video_4951188_earth-receive-heat-sun_.html http://wn.com/climatic_zone

Our Solar System Planet Distance from Sun (km) Diameter (km) Mercury 57,910,000 4,879 Venus 108,200,000 12,104 Earth 149,669,000 12,756 Mars 228,096,000 6,794 Jupiter 778,400,000 142,984 Saturn 1,429,725,000 120,536 Uranus 2,870,980,000 51,118 Neptune 4,498,250,000 49,528

The Earth Distance from Sun 149,669,000km The only known planet that life exist. Has water Has oxygen Average Temperatures are tolerable for life to exist.

Sun-Earth Relationship

Angle of the Sun’s rays and its effect on the amount of heat absorbed by the different parts of the Earth More or less overhead Sun’s rays at the Equator Low angle of Sun’s rays at the Tropic of Cancer Effect on temperature by the heat energy absorbed by the Earth? Effect on temperature by the heat energy absorbed by the Earth? Heat energy is spread out over smaller surface area – more heat absorbed per unit square – Earth is overall hotter Heat energy is spread out over larger surface area – less heat absorbed per unit square – Earth is overall cooler

Atmosphere

Is the Earth tilted at its axis? Line of Axis

Has the tilt of the Earth have an influence on the amount of heat absorbed by the Earth?

Tilted Axis of the Earth

2 Movements of the Earth Rotation about its tilted axis (23.5o) Revolution of the Earth around the Sun. What do these 2 movements together lead to?

2 Movements of the Earth Rotation about its tilted axis (23.5o) Revolution of the Earth around the Sun. What do these 2 movements together lead to? Day/Night Differring Seasons What does this mean?

2 Movements of the Earth Rotation about its tilted axis (23.5o) Revolution of the Earth around the Sun. What do these 2 movements together lead to? Day/Night Differring Seasons = differing climates & living conditions on Earth

Rotation of the Earth about its tilted axis of 23.5o The rotation of the Earth causes : Day and Night

The Earth’s Revolution and Rotation about its tilted axis Video : 1. The 4 Seasons 2. Differing Lengths of Day and Night.

The Revolution of the Earth about its tilted axis and the 4 Seasons Mar 21 Dec 22 June 21 Sept 23

Differing lengths of Day and Night 24 hours Night B Longer Night Sun’s rays Day Nightt Equal length of Day and Night C 24 hours Day D Longer Day E