Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
ecology
|
the scientific study of relationships between ORGANISMS and their ENVIRONMENT
|
|
|
matter
|
everything that takes up space and has mass
|
|
|
energy
|
capacity to do work
|
|
|
low quality energy
|
diffused, dispersed, or low in temperature
example: heat stored in the ocean |
|
|
high quality energy
|
intense, concentrated, or high in temperature
example: high voltage electrical energy |
|
|
law of conservation of matter
|
under ordinary circumstances, matter is neither created nor destroyed
|
|
|
Most energy used in ecosystems originates as...
|
...solar energy
|
|
|
Second Law of Thermodynamics
|
with each successive energy transfer or transformation in a system, less energy is available to do work
|
|
|
entropy
|
the tendency of all natural systems to move towards a state of increasing disorder
|
|
|
molecule
|
combination of two or more atoms
|
|
|
sixteen essential elements:
|
1. H
2. B 3. C 4. N 5. O 6. Mg 7. P 8. S 9. Cl 10. K 11. Ca 12. Mn 13. Fe 14. Cu 15. Zn 16. Mo |
|
|
base
|
a H+ acceptor
|
|
|
acid
|
a H+ donor
|
|
|
Why is water special?
|
-good electrical conductor
-high surface tension -liquid over a wide temperature range -high boiling point -high heat of vaporization -max density in liquid, not solid |
|
|
enzymes
|
proteins; release energy from lipids and carbohydrates
regulate cell activity |
|
|
metabolism
|
all the energy and matter exchanges that occur within a living cell or organism
|
|
|
Heterotrophs convert about __% of the consumed Kcalories into flesh or organic matter.
___% of consumed energy used in respiration is necessary for the energy of motion |
10...90
|
|
|
71% of carbon is in the oceans
|
know this
|
|
|
What are the three "fates" of carbon?
|
-held in the ocean
-plants consume it -converts to fossil fuels |
|
|
How is nitrogen converted?
|
-by nitrogen-fixing bacteria
-by lightening -released from erosion of nitrate-rich rocks |
|
|
What is unique about the phosphorus cycle?
|
There's no atmospheric component.
only liquid or solid |
|
|
What is a closed system?
|
a system whose borders are permeable to both energy and mass
|
