Category 4 Science (8th Grade)
Quiz by Jennifer Davis
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- Q1
You are investigating the relationship between an ear tick and a pronghorn in a prairie. What type of relationship are you most likely investigating?
parasite/host
predator/prey
producer/consumer
biotic factor/abiotic factor
120s8.11a - Q2
The diagram shows a pond ecosystem. What is true of the marsh grass and the grasshopper?
The marsh grass is a herbivore and the grasshopper is a carnivore.
The marsh grass is a predator and the grasshopper is a prey.
The marsh grass is a producer and the grasshopper is a consumer.
The marsh grass is a host and the grasshopper is a parasite.
120s8.11a - Q3
The following graph shows what happens to the population of native birds and spiders on a small island after a new species of snake is introduced to the island. Based on the graph, what can you infer about the relationship between the populations on the island?
The snakes are predators who prey on spiders, and the spiders are predators who prey on the birds.
The snakes are predators who prey on both the spiders and the birds.
The snakes and birds are both predators who prey on spiders.
The snakes are predators who prey on the birds, and the birds are predators who prey on the spiders.
120s - Q4
What unique adaptation might be crucial for an organism in an estuary but not necessary for an organism in a freshwater ecosystem?
An estuary is defined as a water passage where the tide meets a river current especially : an arm of the sea at the lower end of a river. Basically where the ocean meets the river.
special glands to remove excess salt
fins for swimming
structures to attach to rocks
gills to get oxygen from water
120s8.11b - Q5
Some kinds of bacteria can photosynthesize. Do the bacteria in this food web photosynthesize? Why or why not?
Remember: Photosynthesis means the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. If a plant photosynthesizes then THEY MAKE THEIR OWN FOOD!
Yes, they form the base of the food chain
Yes, they are primary consumers
No, they are top predators
No, they consume plant leaves
120s8.11a - Q6
Monogenean worms are parasites that live on the gills of groupers. How will this affect the groupers?
the groupers will be hunted
the groupers will be harmed
the groupers will not be affected
the groupers will be helped
120s8.11a - Q7
A fish in the deep ocean has a lure that lights up to attract mates and prey. Why would it need this adaptation?
Hint: Recall conditions in the deep ocean ecosystems. Relate these conditions to the fish's adaptations.
Many organisms hunt in the deep ocean, so this helps the fish compete.
Sunlight does not penetrate into the deep ocean.
Fish cannot see far in the extreme pressures found in the deep ocean.
The light provides heat in the cold waters of the deep ocean.
120s8.11b - Q8
Following a short-term change to the environment, which traits are most likely to be passed onto the next generation?
traits that increase rates of extinction in the changed ecosystem
traits that allow species to avoid natural selection in a changed environment
traits that allow new species to form in different environments
traits that help individuals to survive and reproduce in the changed environment
120s8.11b - Q9
The graph shows changes in the population of predator and prey over time. Which best explains why the population of prey increased near the end of the timeline shown on the graph?
Fewer predators were hunting the prey
Fewer prey were reproducing
More prey were competing for resources
More predators moved into the area
120s - Q10
Which of the following investigations studies how an organism in an aquatic ecosystem depends on an abiotic factor?
a study of fish eating algae
a study of fish seeking shelter behind a plant
a study of fish mating with another fish
a study of fish swimming in water
120s8.11a - Q11
Which would be the most direct cause of an increase in the cacti population?
The population of coyotes increased
The population of shrubs decreased
The population of kangaroo rats decreased
The population of insects increased
120s - Q12
The diagram shows the mangrove swamp food web. Molds are consumed by some organisms. They are also decomposers in the ecosystem. How would the food web change to show the role of the mold as decomposers?
If the snail population increased, the arrow between the mold and the snail would be reversed.
If the small fish died, an arrow would point from the small fish to the mold.
If the bacteria population increased, an arrow would be added between the bacteria and the mold.
If the mangrove leaves died, the arrow between the mold and mangrove leaves would be erased.
120s8.11a - Q13
Immediately after a forest fire, the primary consumers in the area would compete most for which biotic factor?
Food
Oxygen
Space
Sunlight
120s8.11a - Q14
There are three different species of plants shown. Species Z can successfully share the same environment with the other plants shown because Species Z absorbs water -
found deep underground, and species x absorbs water near the surface soil
found deep underground, and species x absorbs water deep underground
near the soil surface, and species y absorbs water near the soil surface
near the soil surface, and species y absorbs water found deep in the underground
120s8.11a - Q15
Plants that live on the floors of densely populated forests must compete for sunlight. Which type of leaves are most likely found on plants that are best suited to living on the floor of a dense forest?
leaves that are needle shaped
leaves that store the greatest amount of water
leaves with the greatest amount of surface area
leaves that are smallest
120s8.11a
