Grade 9 Science - Part 1 Ecology Flashcards
What are the 2 laws of Thermodynamics?
- Energy can neither be created nor destroyed it merely changes form
- Every time energy changes form energy is lost through waste or useless energy forms into heat
What are the 4 forms of energy?
Solar chemical mechanical heat
What’s the source of all energy for living organism?
The sun
What are the 4 things that are absorbed or reflected by the sun?
- Gasses in the air
- Water
- Rocks & soil
- Living organisms
How do the plants use the sun’s energy?
Photosynthesis
How does a plant use photosynthesis?
By collecting the solar energy and concerting it ti chemical energy or food
chlorophyll?
A green pigment that help plants collect the solar energy
How does energy travel through the food chain/web?
From consumers eating organisms that are lower on the food chain
How much energy is being transferred through consumption?
About 10%
What is 90% of the energy within organisms being used for?
Its being used up to keep that organism alive
How does nitrogen help organisms?
To build materials for amino acids, proteins, and DNA
Nitrogen Fixation/Nitrification?
the process that converts nitrogen gas into different compound
What are the 3 main ways that nitrification occurs?
- Atmospheric Nitrogen Fixation
- Biological Nitrogen Fixation
- Industrial Nitrogen Fixation
Atmospheric Nitrogen Fixation?
Occurs naturally when the energy of lightning breaks nitrogen molecules apart into two individuals nitrogen atoms. Then Oxygen combines with the nitrogen molecules.
Biological Nitrogen Fixation?
Occurs naturally with by certain bacteria within the soil. These bacteria combine nitrogen and oxygen in the soil creating nitrage
