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;
13 Cards in this Set
- Front
- Back
|
Define Matter
|
everything that takes up space and has mass
|
|
|
Define Energy
|
the capacity to do work
|
|
|
Define trophic level
|
Category of organisms defined by how they get energy
|
|
|
What are autotroph producers?
|
Organisms that:
-get energy from sunlight (photoautotroph) or non organic energy sources (chemoautotroph) -convert inorganic compounds to organic forms -1st trophic level in an ecosystem |
|
|
What do chemosynthesis require to make nutrients ?
|
carbon dioxide, water, and an energy source
|
|
|
define heterotroph
|
Organisms that derive their energy by consuming other organisms
|
|
|
Define decomposers
|
Organisms that derive their energy from dead organisms and waste products
|
|
|
Why is decomposition important?
|
Decomposition is important as it creates space for new organisms by reducing the physical space occupied by dead organisms. Decomposition of plants and animals also produces nutrients. In the decomposition of organic materials, products like carbon dioxide, energy, water and organic carbon compounds are released.
|
|
|
What are the trophic levels?
|
Producers
Primary consumers Secondary consumers Tertiary consumers Quaternary consumers |
|
|
What are the laws of thermodynamics?
|
First law : energy can not be created nor destroyed only converted from one from to another
Second law: no energy conversion is 100% efficient some energy is often heat |
|
|
What are the different models of pyramids ?
|
Pyramid of numbers, Ecological pyramids, Pyramid of energy, and pyramid of biomass
|
|
|
If the general estimate of this loss at each step is 90% what is the percentage of energy consumed is available to the next trophic level?
|
10%
|
|
|
What is the benefit and negative consequences of pesticides?
|
Benefit society
-reduce the number of pests to improve crop production -reduce spread of disease Negative consequences -eliminating an insect species -outbreak of diseases = more problems |
