1. Obtaining food 1. __Producers_____ or ___Autotrophs____ -
Organisms that _produce__ their own food (organic chemicals such as glucose)
using energy from light by ___photosynthesis____ or from inorganic chemicals.

2. __plants_____, ____algae___ and some __bacteria___ are autotrophs.

3. 2. ___Consumers____ or ___Heterotrophs____ are organisms that do not make their own food
. They need to _eat__.
This group includes ___animals/humans____, ___fungi____ and most
___bacteria____.

4. Types of heterotrophs
Heterotrophs that eat only plants are called __herbivores____.
Heterotrophs that eat only animals are called ____carnivores___.
Heterotrophs that eat both plants or animals are called ___omnivores____.

5. Photosynthesis
___Photosynthesis___ is the process of converting __light_ energy into
__chemical____ energy,
in the form of ___glucose____.

6. The general equation for photosynthesis is:
6 CO H2O  C6H12O6 + 6 O2
6 carbon dioxide and 6 water
In the presence of light
react to form 1 glucose and 6 oxygen

7. So when a plant undergoes photosynthesis, it changes __carbon dioxide_ and _water__
into __glucose__
gives off _oxygen__ as a waste product.

8. Diagram:

9. Light Light comes in __waves__.
These waves are of different lengths or __wavelengths____.
Different wavelengths of light have different___colors___.
White light contains __all___ the different wavelengths.

10. The visible spectrum of light:
Red Orange Yellow Green Blue Indigo Violet

11. How pigment works
_Pigments____ are substances that absorb and reflect different wavelengths of light.
The color you see is the color that is being ___reflected___ and all the others are being absorbed.

12. but __black__ absorbs all the wavelengths of light.
 __White___reflects all the wavelengths of light,
but __black__ absorbs all the wavelengths of light.

13. Why leaves are green
Leaves contain the green pigment, __chlorophyll___.
Being green enables the plant to absorb light wavelengths at _both__ ends of the spectrum,
but prevents the leaf from getting too ___hot___ since it doesn’t absorb all of the wavelengths like the color black does.

14. Leaf color change
Leaves also contain __carotenoids____, pigments that are yellow, red or orange.
Since most of the pigment of the leaf is ___chlorophyll___, it usually covers up the carotenoid colors.
Leaves change color in the fall because the __chlorophyll_ is destroyed by the cold temperatures before the carotenoids, their colors are visible.

15. Where photosynthesis occurs
Photosynthesis takes place in the ___chloroplasts ___ of the cell, where the chlorophyll pigment is stored.