The Sun’s Energy Some of the sun’s energy is blocked by the ozone layer, (UV radiation) some is absorbed by our atmosphere, (Infrared radiation) and some is reflected by our clouds or the ground.

Where do plants come in? Green plants have molecules called Chlorophyll. Chlorophyll absorb parts of the “Visible” Spectra of Light.Visible Chlorophyll best absorbs Orange, Red, Blue and Ultraviolet.Orange, Red, Blue

Basic Chemistry If an atom has no number after it, there is only 1. H OCAr 1 H1 O1C1Ar If a Molecule has a small number after it, that is how many there are. C 6 H 12 O 6 6 Carbon12 Hydrogen6 Oxygen

If a Molecule has a big number in the front, you multiply everything inside by that number. 2C 6 4H 2 5H 2 O 4 12 Carbon8 Hydrogen20 Oxygen 10 Hydrogen

Photosynthesis Plants take CO 2 and Water and make Sugar and Oxygen.

Let’s Balance The Equation Carbon Oxygen Hydrogen Carbon Oxygen Hydrogen =

CO 2 Levels On Earth Because plants are more active in the summer, CO 2 levels drop in the summer and rise in the winter.

The Greenhouse Effect Many scientists believe that the pollution we make (like CO 2 ) is causing our planet to warm. pollution The hottest planet is Venus. It has an atmosphere rich in greenhouse gasses like CO 2. These gasses trap heat and raise the temp. of the planet.

Proof Of Rising CO 2 We can tell that CO 2 levels have risen steadily for 400 years by taking samples from ancient glaciers and ice fields. samples

Red Orange Blue UV