Name _________________________________
Date _________________ Per. ____
Score _____/ _____
Ecosystem Interactions and Energy Test #1
Directions: Read the directions that precede a question carefully and mark your answer choice on the scantron
provided.
1. All ecosystems are made up of ____________ and ____________ components
a. plants and living
b. animals and living
c. abiotic and biotic
d. wind and moisture
2. ___________ factors are living things such as plants or animals.
a. living
b. abiotic
c. nonliving
d. biotic
3. ____________ factors are nonliving things, such as wind and temperature.
a. biotic
b. abiotic
c. nonliving
d. basic
4. ____________ are organisms that get their energy from nonliving resources, meaning they make their own food.
a. autotrophs
b. heterotrophs
c. detritivores
d. decomposers
5. ___________ are organisms that get their energy by eating other organisms.
a. autotrophs
b. heterotrophs
c. detritivores
d. decomposers
6. What is the ultimate producer for the planet?
a. plants
b. the sun
c. bacteria
d. fungi
7. I eat only plants. I am a ________________.
a. herbivore
b. carnivore
c. omnivore
d. detritivore
8. I eat only other animals. I am a _______________.
a. herbivore
b. carnivore
c. omnivore
d. detritivore
9. I eat both plants and animals. I am a _________________.
a. herbivore
b. carnivore
c. omnivore
d. detritivore
10. I eat dead organic matter. I am a ______________________.
a. herbivore
b. carnivore
c. omnivore
d. detritivore
11. I break down organic matter into simpler compounds. I am a ______________________.
a. herbivore
b. carnivore
c. omnivore
d. detritivore
12. I am the first consumer above the producer level. I am a ___________________.
a. primary consumer
b. secondary consumer
c. tertiary consumer
d. trophic levels
13. I am a carnivore that eats herbivores. I am a ___________________.
a. primary consumer
b. secondary consumer
c. tertiary consumer
d. trophic levels
14. I am a carnivore that eats other carnivores. I am a _______________.
a. primary consumer
b. secondary consumer
c. tertiary consumer
d. trophic levels
15. The levels of nourishment in a food chain are called ___________________.
a. food web
b. food chain
c. trophic levels
16. Two squirrels race up a tree to reach a hidden pile of nuts.
a. intraspecific competition
b. interspecific competition
17. A hyena chases off a vulture to feast on an antelope carcass.
a. intraspecific competition
b. interspecific competition
Name _________________________________
Date _________________ Per. ____
Score _____/ _____
18. Different species of shrubs and grasses on the forest floor compete for sunlight.
a. intraspecific competition
b. interspecific competition
19. Brown bears hunting for fish on a river’s edge fight over space.
a. intraspecific competition
b. interspecific competition
20. Male big horn sheep butt heads violently in competition for mates.
a. intraspecific competition
b. interspecific competition
21. Which of following best describes the term biodiversity?
a. the number of organisms inhabiting tropical rain forests
b. the range of habitats within a geographic area
c. the variety of species living in an ecosystem
d. the abiotic and biotic factors in an ecosystem
22. Which term best describes the area where an organism lives and all of the biotic and abiotic factors affecting it?
a. community
b. population
c. biodiversity
d. habitat
23. What are some of the ways human activities alter ecosystems?
a. introduced species to new areas, clearing forests, fossil fuel burning
b. invasive species, habitat destruction, climate change
c. increasing biodiversity, pesticides, introducing new species
d. both a and b are correct
24. Which of following best describes the role of decomposers in an ecosystem?
a. use energy form the Sun to produce food
b. remove nutrients from dead matter and return it to the soil
c. convert energy from chemicals into glucose
d. use nutrients from dead matter to synthesize sugars
25. Which of the following best illustrates the feeding relationships between organisms in a community?
a. energy pyramid
b. decomposer
c. Hardy-Weinberg equilibrium
d. food web
26. Each level of the energy pyramid represents an amount of energy that organisms can get by eating food sources on
lower levels. What is the term that is used to refer to these levels?
a. trophic
b. consumer
c. energy
d. omnivorous
27. Which of the following describe community interactions in an ecosystem?
a. mutualism, competition, predation
c. competition, predation, symbiosis
b. predation, commensalism, mutualism
d. symbiosis, predation, commensalism
28.
Cleaner birds eat parasites from the inside of the crocodile’s mouth. The birds get to
eat while the crocodile gets his teeth cleaned. What is the symbiotic relationship?
a. mutualism
b. commensalism
c. parasitism
Name _________________________________
Date _________________ Per. ____
Score _____/ _____
29.
Birds hang around cattle and eat insects stirred up by cattle, but do not help nor harm
the cattle. What is the symbiotic relationship?
a. mutualism
30.
b. commensalism
Tapeworms feed in a humans intestines absorbing nutrients while the human
loses nutrients and suffers from nausea, diarrhea and fatigue. What is the
symbiotic relationship?
a. mutualism
31. .
c. parasitism
b. commensalism
c. parasitism
Clownfish live among the anemones and get a home and are protected by their
stinging tentacles, keeping zebra fish away. In return, anemones eats undigested
food scraps from the clownfish. What is the symbiotic relationship?
a. mutualism
b. commensalism
c. parasitism
32. In a food chain, the bottom level represents:
a. consumers
b. producers
c. scavengers
33. In an energy pyramid, the lowest level has:
a. less energy than the top level
b. more energy than the top level
c. less energy than the second level
d. the same amount of energy as the second level
34. A food chain shows:
a. one possible pathway for energy
b. the amount of energy available to a producer
d. decomposers
c. many possible pathways for energy
d. the amount of energy available to a consumer
35. Decomposers are important to ecosystems because they:
a. are at the highest level of the energy pyramid
b. change simple compounds into more complex ones
c. make nutrients available for producers to reuse
d. convert light energy into sugars through photosynthesis
Name _________________________________
Date _________________ Per. ____
Score _____/ _____
36. Which of the following factors in an ecosystem is biotic?
a. insects
b. soil
c. water
d. sunlight
37. Two abiotic factors that affect an ecosystem are:
a. temperature and animals
c. plants and animals
b. water and bacteria
d. soil and water
38. A caterpillar eats a leaf and a bird eats the caterpillar. In this interaction, the bird is a:
a. producer
b. herbivore
c. primary consumer
d. secondary consumer
39. How is a food web model different from a food chain?
a. in a web, energy moves from an organism to only one other
b. in a web, energy may move to many organisms from one
c. in a web, an organsim gets energy from one source
d. in a web, an organism receives less energy than in a chain
40. A crab lives on a beach where it gets food, shelter and a space to live. The beach is the crab’s:
a. niche
b. community
c. habitat
d. home
41. All the leopard frogs in a pond make up the pond’s leopard frog:
a. population
b. niche
c. habitat
d. ecosystem
42. Biodiversity is a measure of the:
a. variety of nonliving things within an ecosystem
b. amount of resources shared by the human population
c. variety of species within an ecosystem
d. amount of renewable resources within an ecosystem
43. Biotic factors in an ecosystem may include:
a. bacteria, soil and water
b. plants, animals and bacteria
c. temperature, water and soil
d. animals, fungi and temperature
44. The same niche in a habitat may be occupied by more than one species?
a. true
b. false
45. The natural world that surrounds an organism is called the organism’s:
a. energy
b. environment
c. lodgings
d. nutrients
46. The study of how living things interact is called:
a. ecosystems
b. abiotic factors
c. ecology
d. the energy pyramid
47. An ecosystem is made up of:
a. biotic only
b. abiotic factors only
c. biotic and the abiotic factors
48. Both consumers and producers are a source of food for:
a. scavengers
b. decomposers
c. carnivores
d. herbivores
Name _________________________________
Date _________________ Per. ____
Score _____/ _____
Bonus questions: These are optional, not required. ANSWER THESE ON HERE, NOT THE SCANTRON
_____ producer
a. made up of many overlapping food chains
_____ consumer
b. organism that converts heat or light energy into chemical energy
_____ decomposer
c. shows how energy is lost as it is transferred up the food chain
_____ food chain
d. organism that gets its energy by eating plants or animals
_____ food web
e. shows one set of feeding relationships between a producer and several consumers
_____ food chain
f. organism that breaks don dead plants and animals into simpler compounds
Draw one food chain that includes the sparrow.