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Matter and Biogeochemical Cycles Flashcards | StudBud
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Matter and Biogeochemical Cycles
Matter and Biogeochemical Cycles
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1
How does deforestation impact the carbon cycle?
Decreases carbon dioxide levels
Increases carbon dioxide in the air
Increases carbon storage
2
How do humans affect the carbon cycle?
By reducing carbon emissions
By planting more trees
By burning fossil fuels
3
How does deforestation affect the water cycle?
Increases precipitation
Reduces transpiration
Increases evaporation
4
Which of the following processes helps to return carbon to the atmosphere?
Respiration
Photosynthesis
Transpiration
5
What is the smallest unit of an element?
Cell
Atom
Proton
6
Which process is primarily responsible for the movement of carbon through the ecosystem?
Photosynthesis
All of the above
Respiration
7
What happens during respiration?
Plants release nitrogen
Animals convert glucose into energy and release carbon dioxide
Animals release oxygen
8
What is the main process that releases oxygen into the atmosphere?
Combustion
Photosynthesis
Decomposition
9
What is the significance of the water cycle for living organisms?
It regulates the temperature of the Earth
It helps in the formation of rocks
It provides essential nutrients
10
How do plants absorb phosphorus?
Through photosynthesis
Through their roots
Through their leaves
11
Which of the following is a way that phosphorus is released into the soil?
Through evaporation
Through photosynthesis
Through decomposition
12
What is the role of decomposers in the nitrogen cycle?
They convert nitrogen into nitrates
They absorb nitrogen from the soil
They break down organic matter and release nitrogen back into the soil
13
What role does nitrogen play in living organisms?
It helps in photosynthesis
It is a building block of proteins
It is a source of energy
14
What happens to carbon dioxide levels in the atmosphere when forests are cut down?
They increase
They fluctuate
They remain the same
15
Which of the following is NOT a part of the carbon cycle?
Photosynthesis
Respiration
Nitrogen fixation
16
Which organisms are responsible for nitrogen fixation?
Fungi
Animals
Nitrogen-fixing bacteria
17
Which sphere of Earth is made up of all the rock at and below the surface?
Hydrosphere
Biosphere
Geosphere
18
What does the biosphere include?
Only the atmosphere
Only nonliving things
Living, once living, and nonliving parts of the environment
19
What is eutrophication?
A type of nitrogen cycle
A condition caused by excessive nutrients in water
A process that increases oxygen in water
20
What role does phosphorus play in living organisms?
It is a source of energy
It helps in respiration
It is a component of DNA
21
What are places where a lot of carbon is stored called?
Carbon factories
Carbon mines
Carbon sinks
22
What is matter?
Anything that has mass and occupies space
Only living organisms
Only gases
23
What does the 'BIO' in biogeochemical cycles refer to?
Biochemistry
Living Organisms
Biology
24
What is the main source of phosphorus for plants?
Soil minerals
Carbon dioxide
Atmospheric nitrogen
25
What is nitrogen fixation?
The process of burning fossil fuels
The process of photosynthesis
The process of converting nitrogen gas into nitrates
26
What is a carbon sink?
Where you wash your hands
A place where carbon is released
A place where carbon is stored
27
How do animals primarily obtain phosphorus?
From the water they drink
By absorbing it through their skin
Through the food they eat
28
Which of the following is NOT a unique property of water?
Turns into a gas at room temperature
Cohesion
Expands when freezes
29
What is the primary role of decomposers in an ecosystem?
To absorb sunlight
To produce oxygen
To break down dead organisms
30
What is the Law of Conservation of Matter?
Matter can only be created
Matter can be transformed but not created or destroyed
Matter can be created and destroyed
31
What is the most abundant gas in Earth's atmosphere?
Carbon dioxide
Nitrogen
Hydrogen
32
What is the significance of the water cycle for living organisms?
All of the above
It provides habitat
It regulates temperature
33
Which cycle involves the movement of water?
Water Cycle
Phosphorus Cycle
Nitrogen Cycle
34
Which of the following is NOT a component of an atom?
Neutrons
Protons
Molecules
35
Through which process do plants use CO₂ from the air to make glucose?
Respiration
Photosynthesis
Transpiration
36
What is a major consequence of excess nitrogen in aquatic ecosystems?
Clearer water
Eutrophication
Lower algae growth
37
According to the Law of Conservation of Matter, matter can be:
Transformed but neither created nor destroyed
Created and destroyed
Only destroyed
38
What is a consequence of deforestation on the carbon cycle?
More trees are planted
Less carbon dioxide is absorbed
More carbon dioxide is absorbed
39
Which process do plants use to convert carbon dioxide into glucose?
Decomposition
Respiration
Photosynthesis
40
What process in the water cycle involves water changing from a gas to a liquid?
Condensation
Transpiration
Evaporation
41
Which of the following processes helps to return carbon to the atmosphere?
Transpiration
Photosynthesis
Respiration
42
Which of the following is NOT an example of a legume?
Soybeans
Clover
Corn
43
What does the term 'abiotic' refer to in an ecosystem?
Both living and non-living things
Living things
Non-living things
44
What are organisms that can convert atmospheric nitrogen into a usable form for plants called?
Consumers
Producers
Nitrogen-fixing bacteria
45
What human activity directly contributes to increased carbon dioxide in the atmosphere?
Recycling
Burning fossil fuels
Planting trees
46
What is the impact of excess phosphorus in aquatic ecosystems?
Decreased algae growth
Eutrophication
Improved water clarity
47
What natural phenomenon can change nitrogen into nitrates in the atmosphere?
Rain
Wind
Lightning
48
How do human activities contribute to the nitrogen cycle?
By planting more trees
By using fertilizers that contain nitrogen
By reducing fossil fuel use
49
Which process is primarily responsible for the movement of phosphorus through the ecosystem?
Weathering of rocks
Respiration
Photosynthesis
50
What is the primary way nitrogen enters the food web?
Through nitrogen-fixing bacteria
Through photosynthesis
Through decomposition
51
Which of the following best describes the role of plants in the carbon cycle?
They release carbon dioxide during photosynthesis
They absorb carbon dioxide and release oxygen
They store carbon in their roots only
52
Unlike other cycles, the phosphorus cycle does not significantly involve which sphere?
Biosphere
Hydrosphere
Atmosphere
53
What is the lithosphere?
The hard rock on or below Earth's surface
The living organisms on Earth
The water supply of Earth
54
What is the main source of nitrogen in the atmosphere?
Oxygen
Helium
Nitrogen gas
55
Which of the following best explains the role of decomposers in an ecosystem?
They break down dead organisms and recycle nutrients
They produce energy through photosynthesis
They compete with plants for sunlight
56
Which of the following best describes the phosphorus cycle?
It involves the atmosphere significantly
It is primarily a land cycle
It is a fast cycle
57
What is a potential consequence of excess nitrogen in water bodies?
Decreased plant growth
Increased biodiversity
Eutrophication
