Download Science 7: Unit A

Science 7: Unit A - Unit Exam
-
WRITE YOUR NAME ON THE ANSWER SHEET!!!
Move your desks apart.
DO NOT write in booklet.
Read each question carefully before answering.
Read each option before answering.
Take your time. You have the entire block to write this
exam.
- If you get stuck on a question, mark it on your answer
sheet and move on. You can come back to it later.
- Good luck!!!
1. Which of the following describes an ecological footprint?
a)
b)
c)
d)
The trace fossil left behind by a large animal
The amount of resources we need to live our lifestyle
The tracks left behind by a population of animals
The population habits in British Columbian ecosystems
2. Which of the following is a population?
a)
b)
c)
d)
A wetland ecosystem
An ant colony
An ant colony and group of aphids
A lawn full of grass and weeds
3. Which of the following ways would allow you to reduce your ecological
footprint?
a)
b)
c)
d)
drive more often
throw out your own garbage
eat more dairy products
recycle more
4. Why did the use of DDT eventually become banned?
a)
b)
c)
d)
a more toxic pesticide was created
it was becoming concentrated in the food chain
It created soft eggshells in Peregrine falcon eggs
All of the above
5. The gradual increase of a chemical in the tissues of organisms as you go
up the food chain is known as:
a)
b)
c)
d)
Bioaccumulation
ecological footprint
concentration
succession
6. The beluga whale species is in serious danger of being wiped out
completely. The beluga whale’s present day condition is known as:
a)
b)
c)
d)
extinct
endangered
threatened
at risk
7. If the beluga whale species does eventually become wiped out, the
species would be known as:
a)
b)
c)
d)
extinct
endangered
threatened
at risk
8. Why were the numbers of Peregrine falcons shrinking so fast?
a)
b)
c)
d)
Predation
Concentration of toxic chemicals in its food chain
Pesticides softened its eggshells
Captive breeding wiped out its adults
9. One method used to help recover its numbers was:
a)
b)
c)
d)
Predation
Succession
Competition
Captive Breeding
10. Which of the following is not a basic need?
a)
b)
c)
d)
Water
Bottled water
Clean air
Shelter
11. What is the ecological footprint for the average Canadian?
a)
b)
c)
d)
1.7 ha
2.2 ha
4.3 ha
75 ha
12. Pet rabbits released into the parks and lawns of Victoria and exploding in
population is an example of an introduced species.
a) True
b) False
13. The following diagram is a food chain.
a) True
b) False
14. The mushrooms in the above diagram are acting as:
a)
b)
c)
d)
producers
secondary consumers
decomposers
scavengers
15. What’s missing from the above diagram?
a)
b)
c)
d)
Producers
Consumers
Decomposers
Scavengers
16. The mouse, rabbit, and grasshopper are all:
a)
b)
c)
d)
producers
omnivores
herbivores
scavengers
17. The owl, frog, snake are all examples of:
a)
b)
c)
d)
producers
herbivores
carnivores
omnivores
18. The one animal in the diagram that is both predator and prey is:
a)
b)
c)
d)
the mushroom
the snake
the frog
the grasshopper
19. Which of the following is an example of an abiotic factor?
a.
b.
c.
d.
earthworms in soil
water in a pond
grass in a field
a bird in the sky
20. Which of the following is an example of mutualism?
a.
b.
c.
d.
a baby kangaroo is carried by the mother kangaroo in her pouch
a mosquito sucking blood from your arm
a bee pollinating a flower
a Venus fly trap capturing a fly
21. Which of the following "ecosystems in a jar" would be most successful?
a.
b.
c.
d.
water, sand, algae, and soil placed in a closet
water, sand, algae, and snails placed in a window
water, sand, algae, and sea weed placed in a window
water, sand, algae, and snails placed in a closet
22. What item in the following list would have the greatest negative impact on
our environment if a student threw it onto the schoolyard?
a.
b.
c.
d.
paper cup
Styrofoam cup
chocolate bar
sandwich
23. A report written to evaluate the health of an ecosystem is known as a(n):
a.
b.
c.
d.
Environmental impact assessment
Ecological impact assessment
Ecosystem impact assessment
Ecosystem impact report
24. The most effective of the three ‘r’s’ to practice is:
a)
b)
c)
d)
Recycling
Reducing
Reproducing
Reusing
25. Becoming a vegan or vegetarian is a good way of decreasing your
ecological footprint.
a) True
b) False
Use the following information to answer the next three questions.
Stasy sets up her own mini-ecosystem. She places sand, water, duckweed (a
plant), seahorses, a snail, and zucchini slices into a glass jar. She then closes
the lid and leaves it closed for the whole three weeks she’s studying it, without
opening it once.
26. Which of the following is an abiotic factor of the ecosystem?
a)
b)
c)
d)
duckweed
seahorses
water
snail
27. Stasy’s ecosystem can be best described as:
a)
b)
c)
d)
natural
open
closed
a super-organism
28. Vultures are animals which prefer to eat already killed animals rather than
hunt down living ones. Which term below best describes vultures?
a)
b)
c)
d)
Decomposers
Scavengers
Consumers
Producers
29. A pyramid of numbers is wide at the base and narrow at the top, because
a.
b.
c.
d.
there are more carnivores than herbivores.
there is more energy available to the carnivores.
there are more herbivores than carnivores.
there is less energy available to the producers.
30. Fleas and your pet dog Fluffy are an example of what?
a)
b)
c)
d)
Mutualistic relationship
Commensalistic relationship
Parasitic relationship
Fun times for your dog
31. Mutualism, commensalisms, and parasitism are all different kinds of:
a)
b)
c)
d)
animal relationships
plant relationships
symbiotic relationships
all of the above
32. When animals try to fight for food, space, and water, they are:
a)
b)
c)
d)
in competition
in predation
scavenging
decomposing
33. The two main goals of any living thing is to:
a)
b)
c)
d)
hunt and kill
eat and drink
live and die
survive and reproduce
34. Tommy bought a patch of land from a developer. The land is a bare patch
of dirt. It used to be a field, but the grass was destroyed in a wild fire.
What kind of succession will take place on Tommy’s land?
a)
b)
c)
d)
primary
secondary
tertiary
bioinvasion
35. It’s been thirty years since the last question and Tommy, now a millionaire,
discovers an island while sailing on his yacht. What living thing should
Tommy introduce to the island if he wants it to undergo primary
succession?
a) algae
b) fungus
c) lichen
d) moss
36. It’s been 5000 years since the above question. Tommy’s Island is now a
beautiful paradise full of large, old trees, animals, and all sorts of living
things. What’s happened to Tommy’s Island?
a)
b)
c)
d)
It’s continuing to undergo succession
The animals are replacing the plants on the island
A climax community has formed
Secondary succession is occurring.
37. To help deal with the large numbers of dung beetles he is studying, Pedro
decides to rope off a section of the meadow ecosystem he’s in and count
the beetles in that area. What has Pedro just done?
a)
b)
c)
d)
Create an environmental impact assessment
Create a temporary plot
Create a quadrat
All of the above
38. What is special about the ecosystems that exist on the ocean floor?
a) The ecosystem exists without the sun’s energy
b) The ecosystem exists at high pressures
c) The ecosystems contain some of the oldest species of animals and plants
on Earth
d) We do not know yet where they get their energy from
39. Which class of organism do all other classes depend on?
a) Producers
b) Primary Consumers
c) Secondary Consumers
d) Scavengers
40. The four processes involved in the water cycle are:
a) evaporation, condensation, and precipitation, and transpiration
b) photosynthesis, respiration, and liquification, and transpiration
c) liquification, melting, freezing, and condensation
d) precipitation, condensation, steamification, and gentrification
41. Where does the matter that makes up all living things come from?
a) From the Earth
b) From non-living materials
c) From abiotic factors
d) All of the above
42. Relationships in an ecosystem are best described as:
a) co-dependent
b) interdependent
c) independent
d) hostile
43. Which of the following IS a basic need of humans?
a) transportation
b) carbon dioxide
c) nitrogen
d) oxygen
44. For a population to survive and grow in an ecosystem, it must:
a) Establish a parasitic relationship with a larger host species
b) Avoid contact with humans and other large omnivores
c) Become adaptive to changes that happen in the ecosystem
d) all of the above
45. True or false: Energy flows only in one direction in food chains.
a) True
b) False
46. How is carbon cycled in an ecosystem?
a) Through plants and from carbon dioxide to carbon monoxide and back
again
b) Through animals and from carbon dioxide to water and back again
c) Through plants changing carbon dioxide to sugar and animals and plants
back to carbon dioxide again
d) Through plants and animals making sugar from carbon dioxide and
plants changing the sugar back to carbon dioxide
47. Energy is continuously being recycled by ecosystems.
a) True
b) False
48. Biomass represents…
a)
b)
c)
d)
The total mass of a population of animals in an ecosystem
The total mass of a community of organisms in an ecosystem
The total mass of one whole niche of organisms in an ecosystem
It represents all of these things
49. Acid rain is produced when…
a)
b)
c)
d)
Carbon dioxide is released into the air
Nitrogen and sulfur compounds are released into the air
The metal mercury is released into the air
DDT and PCB chemicals are released into the air
50. The main reason DDT is still in use today is because…
a) It is an effective fertilizer that helps crops grow
b) It protects humans and crops from disease carrying pests
c) It is still an effective medicine against such diseases as malaria and
typhoid
d) All of the above
BONUS: The two major reasons we talked about why the carbon cycle is now out
of balancer were:
a)
b)
c)
d)
Spraying plants with chemical pesticides and PCBs
Spraying plants with chemical pesticides and bioaccumulation
Producing air pollution and introducing foreign animals
Producing air pollution and clear-cutting of trees