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science ch4
| Question | Answer |
|---|---|
| Which statement describes all primary producers. | all take in energy to assemble energy rich compounds |
| How does water transfer when it evaporates from the ocean? | From the hydrosphere to the atmosphere |
| Juanita is studying the food web of the open ocean. Which step would be more useful for her to follow for her to identify the primary producers of the food web. | look for tiny phytoplankton that float on the ocean surface |
| Autotrophs can be classified into two groups according to which of these properties. | energy source either sun light or chemicals |
| Rabbits are members in a community or meadow. The rabbits eat grasses, clover, as well as roots, seeds, and tree bark. What defines the organism that share the same trophic level. | meadow animals that eat plants and plant products |
| Year after year, Xavier's raises a vegetable garden in the same plot of soil. He absers that the plats grow less abundantly.from one year to the next, and they produce fewer vegetables. Which of these processes could help explain Xavier's observations | The rate at which soil bacteria perform nitrogen fixation |
| A pyramid of biomass is one way to model an ecosystem. How does the amount of biomass generally change from the bottom of the pyramid to the top | the amount of biomass decreases |
| Which statement best describes how matter moves within and between ecosystems | matter cycles through food webs and biogeochemical cycles |
| Danyel's observations and the food chain model provide the strongest evidence for which statement about pod organisms | matter cycles and energy flows through pond organisms from primary producers to series of consumers |
| Which vital element for a life participates in the carbon, nitrogen, and phosphorus cycles | oxygen |
| Would including photosynthesis in the model be reasonable and for what reason. | Yes, because water is a reactant or input of photosynthesis |
| Karen is classifying a group of organisms that are either primary producers or consumers. What is a direct source of energy for all the consumers? | producers or consumers |
| Danielle observes a crayfish nibbling on the remains of a dead Sunfish. Construct a new food chain based on this observation by matching the organisms to the correct locations in the diagram | algae, snail, sunfish, crayfish |
| What scientific reasoning provides evidence that this solution could be effective. | photosynthesis acts to remove carbon dioxide directly from the atmosphere |
| The diagram shows a model of feeding relationships in an ecosystem. What is shown by the arrows that lead to and from the racoon. | The raccoon is a part of one food web and several overlapping food chains |
| Which of the following best describes the flow of energy through a food chain | energy flows from primary producers to consumers in one direction only |
| Autotrophs | can capture energy from nonliving sources and convert it into forms living cells can use. |
| Primary Producers | able to store energy in ways that make it available to other organisms. |
| Photosynthesis | build living tissue using energy to convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches. |
| Chemosynthesis | some bacteria cannot only tolerate high temperatures near the vent but can also harness chemical energy from inorganic molecules such as hydrogen sulfate. |
| Heterotrophs | must acquire energy from other organisms usually by eating them. |
| Consumers | another name for heterotrophs. |
| Detritus | small pieces of dead and decaying plant and animal remains. |
| Food Chain | is a series of organisms in which energy is transferred from one organism to another. |
| Phytoplankton | primary producers that are usually tiny floating algae. |
| Food Web | each step in a food chain or food web. |
| Ecological Pyramids | models that show the relative amount of energy or matter contained within each trophic level in a food chain and food web. |
| Biomass | the total amount of living tissue within a given trophic level. |
| Biogeochemical Cycles | when matter flows from one trophic level to another, and elements are recycled within and among ecosystems. |
| Nutrients | are elements that an organism needs to sustain life. |
| Nitrogen Fixation | process in which only certain types of bacteria can convert nitrogen gas into ammonia. |
| Denitrification | process in which some bacteria obtain energy by converting nitrates into nitrogen gas, which is released into the atmosphere. |
| Limiting Nutrient | any nutrient whose supply limits productivity. |
Created by:
amgrace