An open system is when energy and matter are able to enter and leave at any time. A closed system is when matter does not enter or leave and only some energy can enter and leave.
100
What is transparency and factors that affect it?
Transparency is how clear the water is. Factors that affect transparency are the amount of runoff into the river.
100
What is an atom?
An atom is the smallest particle of an element
100
What is photosynthesis?
Photosynthesis is then a plant takes in CO2 and makes sugars with it.
100
What is an example of combustion?
Cars, boats, lawnmowers, rocket ships ect.
200
What is a positive feedback loop? What is a negative feedback loop?
A positive feedback loop is a chain reaction that moves part of the system towards an extreme. A negative feedback loop is a chain reaction that moves part of the system towards being stable (balanced).
200
What is stream flow?
Stream flow is the volume of water moving through a river over a given period of time. (ft/sec3)
200
True or False: Periods are columns?
False. Groups are columns.
200
What is diffusion?
Diffusion is when an ocean takes in CO2 to make carbonic acid
200
What is an ion?
An ion is a charged atom
300
What are the four spheres?
Geosphere, biosphere, hydrosphere, and atmosphere.
300
What is the positive impact of a high transparency?
It means the river is healthy and there is not a lot of pollution in the river.
300
What is a metalloid?
A metalloid is a group on the periodic table that contains traits of both metals and nonmetals.
300
How has the amount of CO2 in the atmosphere changed over time?
The amount of CO2 has gone up due to excessive combustion (burning of fossil fuels)
300
What is the negative impact of low transparency?
Low transparency means that the river has a lot of pollutants in it.
400
How do humans impact the water cycle?
Humans build and build until there is little to none infiltration in the ground and the runoff increases and the water gets polluted by dirt, trash, oil, ect..
400
What is the negative impact of a high stream flow?
High streamflow means that there is more erosion in the river, which increases runoff.
400
What is a covalent bond?
A covalent bond is when two atoms (normally nonmetals) share valence electrons.
400
Increased use of fossil fuels could have what impact on our planet?
It could warm our planet to the point where the oceans rise and flood all the boarders of the contenients
400
How does a dead zone occur?
A dead zone occurs when there is an excessive amount of nitrogen in a body of water making the algae grow excessively and bacteria, who eat the algae, use up all of the oxygen and all the marine life dies.
500
What are two ways that humans play a role in the nitrogen cycle?
People use a large amount of fertilizer and our sewage systems break and put excessive amounts of human waste in the water
500
What is the positive impact of high streamflow?
High stream flow means that the river can hold more pollutants