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What is an individual path in a food web? (Vocabulary Lesson 6)
Food chain
What is a kind of consumer that uses the wastes or dead remains of other organisms as a source of energy and matter? (Vocabulary Lesson 6)
Decomposer
What is an interaction in a food web where one population directly affects the abundance of another population? (Vocabulary Lesson 6)
Direct effect
What is a model that shows the feeding relationships between organisms in an ecosystem? (Vocabulary Lesson 6)
Food web
What is an interaction in a food web where one population affects the abundance of another population through its effect on a third population? (Vocabulary Lesson 6)
Indirect effect
What is a model that shows how much energy is transferred from one stage to the next in a food chain? (Vocabulary Lesson 6)
Trophic pyramid
What is a scientific law that states that the amount of matter in a closed system stays the same, although the forms of that matter may change? (Vocabulary Lesson 7)
Law of conservation of matter
What is a model that describes how water molecules move among Earth's ecosystems and atmosphere? (Vocabulary Lesson 7)
Water cycle
What is a model that describes how carbon-based molecules move among Earth's ecosystems and atmosphere? (Vocabulary Lesson 7)
Carbon cycle
What is a model that describes how nitrogen-based molecules move among Earth's ecosystems and atmosphere? (Vocabulary Lesson 7)
Nitrogen cycle
What is the replanting of forests that have been cut down? (Vocabulary Lesson 7)
Reforestation
How do food webs represent the flow of energy in the model? (Lesson 6 Game Question # 2)
Food web models represent energy flow using arrows.
Matter flowing through a food web... (Lesson 6 Game Question # 3)
Can take more than one path.
Which of these describes a direct effect of an interaction in a food web? (Lesson 6 Game Question # 6)
An increase in rabbits causes a decrease in plant populations
How is a decomposer also a consumer? (Lesson 6 Game Question # 10)
A decomposer consumes the remains of other organisms.
Which of these accurately describes the role of a decomposer? (Lesson 6 Game Question # 11)
Decomposers act as nature's recyclers.
How do producers get their matter and energy from decomposers? (Lesson 6 Game Question # 12)
Producers absorb the raw materials that decomposers produce.
Which of these trophic levels has the most energy? (Lesson 6 Game Question # 13)
First stage consumers
Why isn't all of one prey's matter transferred to the predator that consumes it? (Lesson 6 Game Question # 14)
Matter can become waste, lost as carbon dioxide and lost to the environment.
What do trophic pyramids demonstrate about the flow of energy in an ecosystem? (Lesson 6 Game Question # 17)
The amount of energy available to each organism decreases as it flows through the ecosystem.
What was the result of the Finnish scientists' first design to restore Lake Vesijarvi's clear waters? (Lesson 6 Game Question # 19)
Their first solution did not meet the criteria of restoring the lake's oxygen.
How did the Finnish scientists who were trying to restore Lake Vesijarvi's oxygen level modify their first design? (Lesson 6 Game Question # 20)
Scientists added top predators to the lake.
Food web diagrams help scientists understand... (Lesson 6 Game Question # 21)
How matter and energy flow among populations of organisms in an ecosystem.
Earth is, in general, a closed system because... (Lesson 7 Game Question # 1)
No matter enters or leaves Earth
Water moves through the _____ and _____ parts of Earth in a global cycle. (Lesson 7 Game Question # 5)
Living: non-living
Which of these describes how water moves between a living thing and its environment? (Lesson 7 Game Question # 7)
A producer takes up water molecules from soil and uses them to make other molecules.
Which of these is not part of the water cycle? (Lesson 7 Game Question # 8)
Humans collect water when it rains.
Which parts of an ecosystem do carbon atoms move through? (Lesson 7 Game Question # 9)
Living and nonliving
How are carbon atoms released in the nonliving parts of an ecosystem? (Lesson 7 Game Question # 10)
Through respiration
How do consumers get carbon atoms? (Lesson 7 Game Question # 11)
Consumers eat other living things.
Why do farmers need to use fertilizers in many ecosystems?(Lesson 7 Game Question # 15)
Nitrogen is a limited resource in many ecosystems.
Which of these is true of the nitrogen cycle? (Lesson 7 Game Question # 16)
Nitrogen takes on different forms as it moves through the cycle.
Which of these would not be a constraint of a reforestation project to capture carbon from the atmosphere? (Lesson 7 Game Question #19)
The project must help to restore an existing forest.
What type of impact will a consumer have on the prey population it consumes? (Lesson 6 Key Science Concept)
It will have a direct effect on the prey population causing it to decline.
According to the 10% rule, if small fish are eaten by tuna, how many 20 gram small fish are needed to make up 100 grams of tuna? (Lesson 6 Key Science Concept)
This level would be the 1000 grams. Each fish is 20 grams so 1000 divided by 20 equals 50 fish.
What is the path of a carbon atom in a plant when it is eaten by a consumer and then released as carbon dioxide into the atmosphere? (Lesson 7 Key Science Concept)
From a living to a nonliving part of the ecosystem
What happens to matter in a closed system? (Lesson 7 Key Science Concept)
Matter is not lost or gained but it can change form.
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