Which phrase best describes an ecosystem? Which phrase best describes an ecosystem? 1. all the living organisms in a specific location 2. all the nonliving materials in a specific location 3. some nonliving materials passing through living organism in a specific location 4. living organisms and nonliving materials interacting in a specific location
1. Identify some biotic factors in the diagram. 1. Identify some biotic factors in the diagram. Deer, trees, frog, duck, plants 2. Identify some biotic factors in the diagram. Water, oxygen, soil 3. Identify what this diagram represents? Support your answer. An ecosystem because it contains biotic and abiotic factors.
Identify what is being described. Identify what is being described. One species living in the same area. The role an organism plays in its habitat. Only eat producers. Break down dead organisms. Hunt for their food. Organisms that consume both plants and animals. Consists of biotic and abiotic factors. Where an organism lives. Produce their own food. Many species living in the same area. Feed off of organisms that have already been killed.
algae→ minnow → lake trout → hawk algae→ minnow → lake trout → hawk Which organism has the greatest energy? Algae 2. Give one effect that an increase in the minnow population would have on the ecosystem. Decrease in algae, increase in lake trout 3. Why are the algae an important part of this food web? They use the sun to produce glucose that is passed through the food chain. 4. What do the arrows represent? Direction of energy
Which level would contain producer organisms? Which level would contain producer organisms? D 2. If birds eat insects that feed on corn, which level would birds occupy? B 3. As one progresses from D to A, what happens to the amount of energy? It decreases because each level uses some of the energy or it lost as heat.
Which organisms would contain the greatest amount of available energy? Which organisms would contain the greatest amount of available energy? Grasses, shrubs 2. Which are the primary consumers? Rabbits, deer, seed-eating birds, rates 3. What organism is not included in this food web and is an essential part of the ecosystem? Decomposers
3. Why are decomposers are necessary in this food web? 3. Why are decomposers are necessary in this food web? They recycle nutrients back into the soil. 4. Identify an effect of a decrease in the wolf population. Decrease in deer Increase in grass
Identify the material cycle being described. Involves condensation and evaporation. Involves photosynthesis and respiration. Important for the production of proteins. Involves the release of oxygen from plants and carbon dioxide from animals. Involves bacteria, plants, animals and decomposers. Involves precipitation, transpiration, photosynthesis and respiration.
Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event in Energy stored in organic molecules is passed from producers to consumers. This statement best describes an event in 1. the process of photosynthesis. 2. natural selection. 3. a food chain. 4. ecological succession.
(1.) are unable to interbreed (1.) are unable to interbreed (2.) have a limited supply of food (4.) have different ecological niches
Which material cycle relies least on the processes of photosynthesis, transpiration, evaporation, respiration, and condensation? Which material cycle relies least on the processes of photosynthesis, transpiration, evaporation, respiration, and condensation? 1. oxygen cycle 2. water cycle 3. nitrogen cycle 4. carbon cycle
Which is not recycled by the processes of photosynthesis and respiration? Which is not recycled by the processes of photosynthesis and respiration? C (2) N (3) H (4) O
(1.) cycling of materials (1.) cycling of materials (2.) limited resources (3.) presence of decomposers (4.) disease
(1.) mutualism (1.) mutualism (2.) decomposers (3.) commensalism
The symbiotic relationship between a human and the fungus that causes athlete's foot is an example of The symbiotic relationship between a human and the fungus that causes athlete's foot is an example of predation (2) commensalism (3) parasitism (4) decomposition
The relationship between fleas and a dog is most similar to the relationship between The relationship between fleas and a dog is most similar to the relationship between (1.) honeybees and flower (3.) nitrogen-fixing bacteria and a legume (4.) athlete's foot fungus and a human
Bacteria of decay are important components of an ecosystem because they Bacteria of decay are important components of an ecosystem because they (1) recycle organic matter (2) are involved in photosynthesis (3) absorb solar energy (4) slow the spread of disease
(1) Commensalism (2) Mutualism (3) Parasitism (4) Decomposition (5) Prey-predator (1) Commensalism (2) Mutualism (3) Parasitism (4) Decomposition (5) Prey-predator The relationship between the crocodile and the leech One organisms is benefits and the other is not affected Organisms hunt for animals as a source of food Both organisms benefit Involved in the recycling of materials back into the soil.
1. Which stage represents a pioneer community? 1. Which stage represents a pioneer community? B 2. Identify the process involving the replacement of stage B by stage C and the replacement of stage C by stage D in a particular location. Succession 3. Which stage would best represent a climax community? E
Which statement concerning the climax stage of an ecological succession is correct? Which statement concerning the climax stage of an ecological succession is correct? (1.) It is the first community to inhabit an area. (2.) It consists entirely of plants. (3.) It persists until the environment changes. (4.) It changes rapidly.
1. Identify the process represented in the diagram.. 1. Identify the process represented in the diagram.. Succession 2. What will this area most likely be if no human intervention or natural disaster occurs by the year 2050? Forest
Which would NOT be considered a renewable resource? Which would NOT be considered a renewable resource? (1.) coal (2.) solar power (3.) ocean waves (4.) hydroelectric power
1. Which substance is the major cause of the loss of our stratospheric ozone shield? 1. Which substance is the major cause of the loss of our stratospheric ozone shield? (1.) CFC's (2.) oxygen 2. Give an example of a negative effect of ozone depletion. More UV radiation reaching Earth’s surface increase in cancer, destruction of producers, eye damage
1. Which is NOT an expected effect of global warming? 1. Which is NOT an expected effect of global warming? (1.) Melting of polar ice caps. (2.) Flooding of coastal areas. (3.) Increased crop yields. (4.) Alteration of rainfall patterns 2. Identify two possible causes of global warming. Melting of polar ice caps flooding Climate change Habitat destruction
There is ample evidence to suggest a direct relationship between global warming and increased There is ample evidence to suggest a direct relationship between global warming and increased (2.) carbon dioxide concentration (3.) acid rain (4.) CFC's
1. Deforestation will most directly result in an immediate increase in 1. Deforestation will most directly result in an immediate increase in (1) atmospheric carbon dioxide (2) atmospheric ozone (3) wildlife populations (4) renewable resources 2. What are some other negative effects of deforestation? Habitat destruction
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