Eco-system processes Flashcards
What are algae?
Green unicellular or multicellular organisms that perform photosynthesis and live underwater.
What is a producer?
An organism that makes its own food by photosynthesis.
What is a consumer?
Organisms that eat other organisms as food.
What is photosynthesis?
The process plants use to make their own food, glucose.
State the word equation for photosynthesis.
carbon dioxide + water —>glucose + oxygen
What is chlorophyll?
Green pigment that absorbs light for use in photosynthesis.
Name some adaptions of leaves and why these are helpful.
4 adaptions
Leaves are:
•Green (they have chlorophyll which is useful for photosynthesis)
• Thin (allows gases to diffuse in and out easily)
Leaves have:
•A large surface area
•Xylem (to transport water) and phloem (to transport glucose)
What are stomata?
Holes on the bottom of a leave that allow gases to diffuse in (carbon dioxide) and out (oxygen).
How do stomata work?
The holes are surrounded by guard cells. These cells open at night to let oxygen out and carbon dioxide in. They close in the day so that carbon dioxide can’t leave when photosynthesis is taking place.
Why do plants need nitrates?
For healthy growth.
Why do plants need phosphates?
For healthy roots.
Why do plants need potassium?
For healthy leaves and flowers.
Why do plants need magnesium?
For making chlorophyll.
What are fertilisers?
Chemicals containing minerals, normally applied to soil.
What is chemosynthesis?
Reaction performed by bacteria, using energy transferred from chemical reactions to produce glucose.
What is the word equation for chemosynthesis?
There isn’t one as the chemical reaction depends on the chemical involved. Chemosynthesis can produce glucose with multiple chemicals.
Complete the statement:
Chemosynthesis uses ___________ as their source of energy.
chemicals
Complete the statement:
Chemosynthesis often uses ___________ as the reactant.
carbon dioxide