How many atoms of hydrogen are in 2 molecules of H2?
4
100
What is a population?
All the organisms of one species in one area.
100
How many atoms of oxygen in one molecule of O2?
2
200
What are the parts and purpose of an ecosystem?
Parts: Biotic and Abiotic factors
Purpose: Balance
200
What is energy?
Power derived from the use of physical or chemical resources
200
What is required for photosynthesis and what are the results?
Water and carbon dioxide go in sugar and oxygen come out.
200
Describe or draw the shape that populations most often take.
A wavy wave.
200
What do the prefixes "a" and "bio" mean
A: non
Bio: life/living
300
Which terms are synonyms: abiotic, biotic, biological, physical
abiotic and physical
biotic and biological
300
Give three examples of matter in ecosystems
1.
2.
3.
300
What makes up all the matter around us?
Atoms
300
What are resources for populations?
Food, water, territory
300
Is the oxygen and carbon dioxide cycle represent a flow of energy or a cycle of matter?
A cycle of matter.
400
Give three examples of biotic factors
1.
2.
3.
400
What is the ultimate source of energy in ecosystems?
The sun
400
What are the elements involved in photosynthesis?
Carbon, Hydrogen, Oxygen
400
What characterizes a resource?
Something that an organism needs in order to survive.
400
A fire occurs in an area. How would this affect a physical component and a biological component of that ecosystem?
Physical?
Biological?
500
Name 5 abiotic factors
1.
2.
3.
4.
5.
500
How does energy flow through ecosystems.
From the sun to producers, to consumers, all broken down by decomposers.
500
How does photosynthesis help to cycle matter and flow energy?
Photosynthesis allows plants to take in carbon dioxide and releases oxygen (cycle of matter).
Plants produce glucose as a byproduct during photosynthesis, when consumers eat plants they get the sugar which they use for energy (flow of energy).
500
What happens to a predator population when a prey population increases? What about decreases?