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STEMSci8 Exam Review: Unit 1 Flashcards | StudBud
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STEMSci8 Exam Review: Unit 1
STEMSci8 Exam Review: Unit 1
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Scientific Method
Flashcards
92 cards
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Practice quiz
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Questions
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Answers
1
What is the hydrosphere?
All living organisms on earth
Liquid water on Earth
Earth’s entire solid body
Layer of gases surrounding Earth
2
What is the primary role of decomposers in an ecosystem?
to provide a source of energy for producers
to compete with producers for energy and other resources
to recycle energy from dead producers and consumers
to control the population of producers and consumers
3
Dependent variable
A variable (often denoted by z)
All of them
A variable (often denoted by x)
A variable (often denoted by y)
4
definition of carrying capacity
A single self contained entity that performs basic functions
biotic or abiotic factor that resist the growth of a population
maximum number of organism that supports an ecosystem
5
What is the dependent variable?
type of fish
the time it takes to finish maze
type of food
amount of food
6
All of the following are density dependent factors EXCEPT
parasitism
natural disasters
predation
disease
7
A sunflower has what role in an ecosystem?
Decomposer
1st level consumer
2nd level Consumer
Producer
8
what is mutualism?
a tiger
where on organsim benifits and the other does not
where both organisms benifit
9
An example of commensalism is...
a butterfly and a flower
A clown fish and a sea anemone
A sea anemone and a clownfish
fleas and dogs
10
Define Population
Animals and plants which have varying habitats
A population is a group of living and non living things.
Is a cycle that contains a frog connected to other species.
Is a group of individuals which lives in the same area.
11
What are ABIOTIC FACTORS?
Temperature and climate
Living factors
Non-living factors that affect living factors
Habitats
12
What are the three main types of fossil fuels?
Coal, Gas, Water
Gas, Electric, Water
Coal, Oil, Gas
Smoke, Water, Fuel
13
What is transpiration?
how plants get their color
the loss of water from leaves
None of the above
the female reproductive structure of a flower
14
What is the difference between the people who like cats and goldfish?
4
2
8
5
15
Which goes first in a scientific experiment?
hypothesis
conclusion
question or problem
data, tables and charts
16
Fossil fuels are formed naturally.
no
yes
17
A controled experiment...
does not add any variables to the tests
Ussually only includes one trial
only tests one variable
tests multiple variables
18
What is a trophic level?
The transfer of energy
The ultimate energy source
The direction energy and matter is transferred
Each step in a food chain
19
What is Biodiversity?
The variety of living organisims found in an area
Cells in a plant
A disease
Small insects and animals in a city
20
Carrying Capacity Applies To:
All of the above
Animals
Plants
Humans
21
Independent variable
a variable (often denoted by z)
All of them
a variable (often denoted by x)
a variable (often denoted by y)
22
What are abiotic factors?
Another name for biomes
living part of a environment that an organism interacts with
All interactions between different species
Nonliving part of a environment that a organism interacts
23
Which of the following tells you population density?
the number of bacteria per square millimeter
the number of births per year
the number of deaths per year
the number of frogs in a pond
24
Which would you do first in a scientific investigation?
form a queston or probem
draw conclusions
write a hypothesis
organize data
25
Describe where most fossil fuels are located.
Lakes
Natural gas
Deep beneath the Earth
Tilted Towers
26
What is a Niche?
An animals role in their environment
A type of bird
The second stage of an ecosystem when the soil is intact
An animal that eats meat
27
What would happen if scientist didn't publish thier findings in journals?
Other scientists would not benefit from thier work.
They would never be famous
They could get too famous
People could steal thier work
28
Only scientists
perform experiments
make observations
record data
research
29
What is the role of a producer in an ecosystem?
use energy from the sun to make food
decompose dead organisms
eat other living organisms
feed on dead organisms
30
The carrying capacity for the rabbit population is
40
not enough information
60
80
31
What is an example of predation?
A bird eats a walnut
a vine grows up a tree but does nothing to the tree
a bee gets nectar from a flower and spreads pollen
a fish swims through the ocean
32
mutualism, commensalism or parasitism
mutualism
parasitism
commensalism
33
What was a impact to science that Charles Darwin did
Discovered the element radium
discoverd the double helix structure
Made Chocolate pudding
became the foundation of modern evolutionary studies
34
When you write down or record what is happening in your experiment it is called
a hypothesis
a conclusion
an observatoin
an experiment
35
What are the products of the combustion of fossil fuels?
carbon dioxide and water vapour
carbon dioxide and glucose
glucose and water vapour
calcium carbonate and water vapour
36
Which of the follwoing is always an impaortant part of an experiment?
observing things in nature
identifying and cotrolling variables
making drawings of things observed
making a working model
37
Define PARASITISM
where one organism is harmed and nothing happens to the other organism
where one organism benefits and nothing happens to the other organism
where both organisms benefit
where one organism benefits and one organism is harmed
38
independent variable
not this one.
the only factor that the scientist purposefully changes
the change that occurs in response to the (blank) varible
not this one either
39
what is biosphere??
all waters of Earth
gasses surrounding the Earth
places on Earth occupied by living organisms
crust and upper mantle of Earth
40
The first step in the scientific method a scientist usually takes is to
gather evidence
create a testable question
create a hypothesis
create a conclusion
41
Which of the following represents the carrying capacity of this population?
The dotted line
A
D
B
42
mutualism, commensalism or parasitism
commensalism
parasitism
mutualism
43
what is primary succession
a mini habitat within a larger one
series of changes were organisms in a ecosystem
the factors that limit dispersal of a species
series of changes were no organisms or soil exist
44
Nitrogen fixation is the process in the nitrogen cycle that...
Nitrogen is removed from dead organisms to be used
Bacteria in the roots of plants turn N2 gas into usable form
Nitrogen is fixed into the atmosphere
Bacteria in the soil turn nitrogen back into N2 gas
45
what is succession?
changes in community structures over time
community structures built over time
same community structures over time
community structures destroyed over time
46
parasitism , commensalism , and mutualism are types of
symbiosis
extinction
niche
prey
47
Which is a density dependent factor?
forest fire
flood
disease
volcanic eruption
48
Population density refers to the
area inhabited by a population.
number of people in each age group.
number of individuals per unit area.
carrying capacity.
49
What is the atmosphere?
Located in the middle of the Earth
Whole mass of air surrounding Earth
All of the above
Makes up all of the water on Earth
50
The Carbon Cycle...
Has Combustion through burning fossil fuels
All of the above
Affected by volcanoes
Relies on decomposing organisms
51
What impact does deforestation have on the carbon cycle?
Increase in the amount of cellular respiration performed by autotrophs
Decrease in the amount of CO2 in the atmosphere
Deforestation has no impact on the carbon cycle
Increase in amount of CO2 in the atmosphere
52
When we gather information with our senses - taste, touch, smell, see, hear - it is called.
performing experiments
forming conclusions
stating hypotheses
making observations
53
The owl has what role in the ecosystem?
Secondary Consumer
Tertiary Consumer
Primary Consumer
Producer
54
All of these are steps in the nitrogen cycle EXCEPT...
Absorption by plants
Infiltration
Nitrogen fixation
Decomposition of dead organic matter
55
Interpretting data: In the graph below what is the 2nd most popular sport in the school
softball
basketball
soccer
other
56
What is a heterotroph?
An animal that decomposes dead organisms
An organism that CAN produce its own food and does not rely on others
An organism that CANNOT produce its own food so relies on other organisms
A non-living thing
57
What is the role of the foxes in this food web?
herbivore
carnivore
decomposer
producer
58
When we gather information using the 5 senses this is called....
stating a hypothesis
making observations
performing experiments
forming conclusions
59
A control group is used
as data
to compare a variable to
as a conclusion
for multiple trials
60
What Is Ecology?
the maximum amount that something can contain.
IDK
A Branch Of Biology That Involves Living things.
61
Biotic factors
Flowers,grass,horses,elk
Sand,horses,flowers,grass
Elk,water,horses,flowers
Purple,flowers,elk,grass
62
The number of organisms an ecosystem can support
exponential growth
logistic growth
density dependent
carrying capacity
63
Which two factors increase population size?
births and emigration
deaths and emigration
deaths and immigration
births and immigration
64
Scientists share thier findings to....
so they don't have to repeat it
compete with each other
learn from each other
kep their work secret
65
How do experiments help scientist learn.
It only helps if they get thier hypothesis right.
It helps them learn only if they make new discoveries.
It helps them become famous
It helps them answer questions about the world
66
What biome has the most biodiversity?
Temperate Forest
Desert
Tropical Rain Forest
Grassland
67
The Engineering Design Process
a way to ask and answer scientific questions
a series of steps to find a solution to a problem.
a logical way to discover how things in the universe work.
steps the engineer does before he starts the train.
68
Precipitation occurs because
the droplets evaporate in the air
the droplets are too heavy for the air to hold
the droplets are too light for the air to hold
69
What role do fungi play in an ecosystem?
Predator
Producer
Decomposer
Consumer
70
Which of the following are abiotic factors
microorganisms
soil
fungi
grass
71
What is the Nitrogen Cycle??
A Cycle
The Water Cycle
Nitrogen being converted between chemicals
Sublimation
72
Define commensalism
When 1 organism benefits and the other is harmed.
Relationship where 1 organism benefits & one doesn't care.
When both organisms are harmed by the relationship.
When Harry gives Dobby a sock!
73
Fossil Fuels formed from..
Coal, oil, natural gas, and other fuels
a form by carving, casting, or other shaping techniques
object from poured molten metal or other materal into a mold
ancient remains of plants and animals
74
Where can we find biodiversity
Anywhere
Only in cities
In certain rivers only
In certain forests only
75
a detrivore is also called a decomposer because they gain energy by eating dead or decaying things.
False
True
76
What is the independent variable?
amount of food
how fast fish complete maze
type of food
type of fish
77
What amount of energy is passed from one trophic level to another?
50%
20%
10%
40%
78
What role does the sun play in the ecosystem?
The source of energy for only consumers
The source of energy for only producers
The source of all energy in an ecosystem
The source of energy for only scavengers and decomposers
79
All the the following are density independent factors except
weather
competition
seasonal cycles
natural diseasters
80
What is Symbiosis?
An organism that does not interact with others
The birth of an organism
The interaction of different organisms in an environment
When an organism has aged
81
What is the total mass of living matter at each trophic level called?
mass
matter
biomass
biomatter
82
Biodiversity increases ecosystem resilience.
False
True
83
Define biotic factors
living part of a environment that an organism interacts with
Any dinosaurs
Don’t know, don’t care
Nonliving part of a environment that a organism interacts
84
What is the geosphere?
Study of plants and living things
Surface of earth (rocks, minerals), and nonliving things
One of the layers of the earth
Study of rocks and minerals
85
What is biomass?
Nature and living organisms
Land
Trash
Waste material from plants or animals that can be used.
86
Predation is..
Predators eating prey
Animals of different species fighting for the same recource
Animals of the same species fighting for the same recource
Prey eating predators
87
What is an ecosystem?
A community of only living things
A community of only one species
Community of living and nonliving things
A community of only nothing things
88
What is the role of the lizard in this food web?
tertiary consumer
producer
secondary consumer
primary consumer
89
A variable can be controlled when:
When you make constant chages to the groups.
When all your test groups are the same.
When none of your test groups are the same.
You compare a normal group to a group you are testing on.
90
Scientific evidence is:
data that supports your findings
how people feel about things
supported by popular votes
what people like
91
Symbiotic relationships are realationships between ________________.
Cars
Oceans
Biomes
Organisms
92
Succession means...
A process involving a change in plant and animal communities
Moving in a straight line
Having success
Succeeding to someone
