1. Warmup
A group of bright stars named for an animal, a mythological character, or an everyday object is known as a…
Which of the following contributes to the transfer of thermal energy from place to place around the earth?
The movement of ocean water, but not the movement of air
The movement of air but not the movement of ocean water
Both the movement of ocean water and the movement of air
Neither the movement of ocean water nor the movement of air because thermal energy moves separately from the water and the air

2. Photosynthesis
1.1.4c Explain how solar energy is transformed into chemical energy through photosynthesis.

3. Particle Model of Light
Sometimes light behaves like a stream of particles
When a beam of light shines on some substances it causes tiny particles called electrons to move
The movement of electrons causes an electric current to flow

4. Particle Model of Light
Sometimes light can even cause an electron to move so much that it is knocked out of the substance
This process is called the photoelectric effect

5. Particle Model of Light
The photoelectric effect can be explained only by thinking of light as a stream of tiny packets, or particles of energy
Each packet of light energy is called a photon
Albert Einstein first explained the science behind the photoelectric effect in 1905

6. Photosynthesis
The key cellular process involved with producing energy in plants is photosynthesis.
Chlorophyll is a green pigment that absorbs sunlight. When chlorophyll absorbs light energy, much of that energy is transferred to the electrons in the chlorophyll molecule. These high-energy electrons are what make photosynthesis work.

7. Photosynthesis
In the process of photosynthesis, plants use energy from sunlight to convert water and carbon dioxide into high-energy glucose and oxygen. The equation looks like this:
6CO H2O light  C6H12O O2
carbon dioxide + water + light energy  glucose + oxygen

8. Photosynthesis
In plants, photosynthesis occurs in the chloroplasts.

9. Photosynthesis
The reactions of photosynthesis are split into two parts: the light-dependent reactions and the light- independent reactions also called the Calvin cycle.
C6H12O6

10. Photosynthesis Many factors affect the rate of photosynthesis.
A shortage of water can slow or stop photosynthesis.
No water = no photosynthesis
Temperature is also a factor since photosynthesis depends on enzymes that work best at temperatures above freezing.
Cold temperatures = less photosynthesis,
Warm temperatures = more photosynthesis
The amount of light also affects the rate of photosynthesis
More light means it happens faster, less light and it occurs slower