Biology Chapter 8-Photosynthesis

• process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches
• 

• light-absorbing molecule
• pigments will either absorb or reflect the light. absorbing it creates no color and reflecting it creates color.

a mixture of different wavelengths of light. we see this as white light- all colors=white

Respiration

• it would store the excess energy
• brings it back out so it can burn it or use it

chemical compounds

• sodium potassium pump
• moving organelles around in the cell

• small
• lasts for only a few seconds of activity

• discovered that water was apart of photosynthesis.
• mass gained from the willow came from water.
• Van Helmont's experiment occured in the 1600's

• he found out that the mint leaf releases oxygen.
• occured 100 years after Van Helomnt.
• Proved that oxygen was apart of photosynthesis

• carbohydrates -> sugars -> gluclose(most specific)
• these can be interchangeable.....

• he had observed that priestly's experiment only occurs when in light.
• Jan I. proved that sunlight is needed to produce oxygen.

The experiments performed by van Helmont, Priestley, and Ingenhousz led to work by other scientists who finally discovered that in the presence of light, plants transform carbon dioxide and water into carbohydrates, and they also release oxygen.