MidTerm Cram / Test Review!
1st Activity
• Get out your purple packet!
• Choose 2 colors or use X’s and O’s
• Go through and indicate which questions you
only need to review once/you know well
• Go through and indicate which questions you
REALLY have to look up info about
2nd Activity: Making Connections
• Remember our major themes….
In the back…take pictures and figure out the best connections
that link them together by sorting and drawing arrows
– You can have multiple connections between pictures
– Defend your linkages
Also include:
– Where energy is put in and energy is put out (make a legend?)
– Where any of the three laws are exemplified (color-coding?)
Finally: describe as many connections to a theme
3rd Activity: Review Game!
• We’re going to review our 2 major tests with a
“relay” format
•
•
•
•
Teams of 4; each has a, b, c, d answer cards
A question will be projected.
Decide the best answer
Within time frame (it’s not a race!), get your
answer card into the bin
• What do we call the other environmental
factors that we want to keep exactly the same
between two groups we are testing?
a.
b.
c.
d.
Controlled Group
Data
Constants
Independent Variable
• The first organism in a food chain must always
be a:
a.
b.
c.
d.
e.
carnivore
herbivore
decomposer
producer
The sun
In a food chain below, 14,309 calories of energy is stored
in the producers. How much energy is available for the
snake? Hint: Think about how much energy gets
transferred at each step.
algae –––––> insect ––––> frog –––> snake ––––> fish
a. 114,309 cal
d. 143.1 cal
b. 14,309 cal
e. 14.3 cal
c. 1,430.9 cal
Soil is defined by its particle size. If the particles
are arranged from largest to smallest are sand
– silt – clay, what does that mean for the soil’s
ability to hold water?
a. Sandy soil has the best water-holding capacity
b. Clay soils need to be watered less often than
sandy soil because their water-holding
capacity is good.
c. Silt soils have good infiltration rates but poor
water holding capacity
d. Clay soils have the best infiltration rates
• The process in which rocks are broken apart
by temperature changes is:
a. decomposition
b. erosion
c. leaching
d.weathering
Compost is best described as:
a) decayed plant matter that can be used as
humus
b) a soil additive made from fossil fuels
c) a synthetic fertilizer
d) a primary nutrient needed by plants
You are sent to a country where people are
dying of starvation. Your job is to teach them
how to survive on their own without any
imported food. In order to provide food for
the largest number of people, you should
teach them how to:
a. raise cattle
b. hunt predatory birds
c. plant and irrigate crops
d. none of the above
The most important organisms involved in the
nitrogen cycle are:
a. humans
b. plants
c. cows
d. insects
e. bacteria
• Broad-spectrum pesticides increase the
problem caused by the pest when they:
a. eliminate the pest
b. eliminate the pest’s food
c. eliminate the pest’s predators
d.eliminate other pests
Scientists hope to use genetic engineering
techniques to:
a) develop crops that are resistant to attacks by
a particular pest.
b) breed insects that prey upon important pests
that threaten food crops.
c) make organisms more desirable.
d) all of these.
Communities have attempted to control the size of
mosquito populations to prevent the spread of
certain diseases such as malaria and encephalitis.
Which control method is most likely to cause the
least ecological damage?
a) Draining the swamps where mosquitoes breed
b) Spraying swamps with chemical pesticides to kill
mosquitoes
c) Spraying oil over swamps to suffocate mosquito
larvae
d) Increasing populations of native fish that feed
on mosquito larvae in the swamps
Bacillus thuringiensis (B.t.) is a:
A. broad-spectrum insecticide
B. persistent insecticide
C. predatory insect
D. selective insecticide
Which of the following ecosystem components
is least important?
a. Producers
b. Decomposers
c. Consumers
• Biomagnification refers to :
a. “the rule of 10%” where only a certain
amount of energy is available to the next
trophic level
b. A wastewater treatment step where bacteria
is added to the sewage
c. Creating superpests by the overuse of GMOs
d. The accumulation of toxins within the food
chain because they do not degrade during
consumption
• Water covers approximately _______ of
Earth’s surface, of which ______ is freshwater.
a. 50%...2%
b. 80%....10%
c. 95%....20%
d. 75%....3%
Of the available surface water on the planet, the
greatest percentage is used for:
a. industry
b. agriculture
c. manufacturing
d. showering and personal use
• What is the most practical way to make sure
everyone on Earth has enough freshwater to
meet their daily needs?
a. desalination
b. enforce methods of water conservation
c. drill more well into aquifers
d. build more dams
• Which of the following MOST likely to cause
conflict between two countries that share a
river?
a) The upstream country drills a large number of
new water wells
b) The upstream country builds a series of new
dams
c) The downstream country uses an increasing
amount of water for irrigation
d) The downstream country dumps pollutants into
the river before it enters into the ocean.
During which of the following does water move
in a direction different from the others?
a. percolation
b. transpiration
c. infiltration
d. precipitation
Which of the following DOES NOT increase the
likelihood of flooding?
a. building on floodplains
b. building dams
c. urbanization (housing)
d. removing water absorbing vegetation
Nutrients and animal wastes from farms may
decrease__________ in water
a. nitrogen
b. dissolved oxygen
c. sediment
d. decomposing bacteria
What is the correct order for the steps of cultural
eutrophication?
1. rapid increase in algae growth
2. fish kills due to lack of oxygen
3. introduction of nutrients (nitrogen and/or
phosphorus)
4. bacterial decomposition of dead algae
a. 4, 2, 3, 1
b. 1, 4, 2, 3
c. 3, 1, 4, 2
d. 3, 4, 2, 1
The least likely cause of cultural eutrophication
in Sandy Run Creek would be:
a)
b)
c)
d)
Fertilizer run-off from Lu-Lu Country Club
Agriculture run-off from Ziegler’s Rose Farm
Leaking gasoline tanks
Sewage effluent from Abington Wastewater
Treatment Plant
• Point source pollution and nonpoint-source
pollution differ in
a) The kind of biological agents causing the pollution.
b) Whether the source of pollution is agricultural or
industrial.
c) The number of sources from which the pollution is
discharged.
d) Whether the pollutants are chemical or physical
agents
•
• Which of the following is NOT an effective
method of water conservation?
a)
b)
c)
d)
Take fewer, shorter showers.
Watering your lawn at noon.
Fixing your leaky faucets and toilets.
Washing full loads of clothes and dishes.
• A disadvantage of building dams is that
a) The reservoir created traps sediment and
pollutants
b) Farmland below a dam might be less fertile
because sediment can't travel downstream
c) Some fish, like salmon, can't get upstream to
spawning grounds
d) All of the above.
Surface water becomes groundwater when it
a) Evaporates from a body water into the
atmosphere
b) Condenses to form drops of liquid water
c) Percolates through the soil into an aquifer
d) Flows onto the ground through a spring
• When neighborhood residents noticed a large
number of dead fish in a local creek, they
traced the problem to a nearby gas station. It
turned out that a tank of anti-freeze
developed a leak. This is an example of
a. Point pollution
b. Thermal pollution
c. Non-point pollution
d. Groundwater pollution
• What is the correct order of the path rain
takes when it falls at UDHS?
a) Schuylkill River, Wissahickon Creek, Delaware
Bay, Delaware River
b) Wissahickon Creek, Delaware Bay, Delaware
River, Schuylkill River
c) Wissahickon Creek, Schuylkill River, Delaware
River, Delaware Bay
d) Schuylkill River, Wissahickon Creek, Delaware
Bay, Delaware River
• In an ecosystem, which component is NOT
recycled?
a.
b.
c.
d.
Water
Energy
Oxygen
Carbon
• The best indicator of water quality is:
a.
b.
c.
d.
Algae
Fish
Macroinvertebrates
Temperature
Your little brother is trying to reunite is fish Scuba with
his ocean friends by flushing him down the toilet.
This won’t work b/c at a wastewater treatment
plant…
a. The chlorine added to kill the bacteria would also
kill Scuba
b. Scuba would get caught by the bar screen and sent
to the landfill
c. At the end of the treatment process, Scuba would
be into a river, not the ocean
d. The oxygen added during aeration would cause
Scuba to die from supersaturation
• All of the following are sources of oxygen used
by fish and/or other organisms in an aquatic
ecosystem except:
a. Oxygen produced by algae
b. Oxygen dissolved in the water
c. Air at the surface of the water
d. the oxygen in the water molecules
What is the independent variable
a)
b)
c)
d)
Population size
Species type
Water depth
time
• One reason groundwater pollution is difficult
to clean is that…
a. Pollutants cling to rocks that make up
aquifers
b. The cold temperatures prevent bacterial
breakdown of pollutants
c. Recharge may take hundreds of years
d. All of the above
• In which location would you expect to find the
highest level of dissolved oxygen?
a. Riffles and rapids in the upper reaches of the
stream
b. Pools in the middle reaches of the stream
c. The slow, steady moving water in the lower
reaches
d. All have the same level of dissolved oxygen
• A ____ study is a description of the ____
conditions of the aquatic environment
a.
b.
c.
d.
Chemical ; long-term
Chemical ; overall
Macroinvertebrate ; long-term
Macroinvertebrate ; current
• In which location would you expect to find the
highest level of dissolved oxygen?
a) Riffles and rapids in the upper reaches of the
stream
b) Pools in the middle reaches of the stream
c) The slow, steady moving water in the lower
reaches
d) The wetlands along a stream
• Most of the earth’s fresh water is located in:
a. Glaciers and ice caps
b. Groundwater
c. surface water
d. the oceans
Put the letter(s) in the bin for all True
a) In a healthy stream, the dissolved oxygen
readings will increase as temperature increases
b) Streams are more susceptible to pollution than
lakes because of their increased flow
c) Eutrophication is a natural process that can
occur with or without the influence of humans
d) The quality of water in streams that flow
through areas with wetlands is better than
water in streams that run through highly
developed areas.
Which step is optional at a waste
water treatment plant?
a)
b)
c)
d)
Adding chlorine
Removal of phosphates & nitrates
Aeration
None are optional