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Biology 9-CVS
Biology Mid term
| Question | Answer |
|---|---|
| What is Hypothesis and give example? | When you make a ulter guess. Like how much money I will get for my birthday. |
| Why is it important for scientists to publish the details of their experiments as well as the results? | So their peers can evulate the experiment and results who are conducting similar research whether it is now or in the future. This way there is data stored and recorded. |
| What is a theory? | An explanation of a natural phenomenon supported by many observations & experiments overtime (Cell theory & Theory of evolution) |
| Where do decomposers get their food from? | From dead or decaying organisms |
| What is the difference between a quantitative and a qualitative measurement? | Quantitative- Data collectied as number (Time,temp,length, mass,area, volume) Qualitative- Descriptions of what our senses detective. |
| Why is it important to understand science? | Because science is in your every day life.Measuring mixture and all sorts of stuff. |
| Describe the difference between an observation and an inference | Observation-Direct method of gathering info. in an orderly way. Interference-combine what you know with what you have learned & begin in a process of making logical conclusions. |
| What is a variable? | Is the factor in the experiment that is being texted. |
| What are independent variables? | |
| What is a stimulus? Give an example | A reaction to something like. Like a shark smelling blood in water and going towards it. Plant leaning towards the sun coming through the window. |
| What is the correct sequence for the steps of the scientific method? | 1-State the problem #2Propose a hypothesis #3-Experiment to gather data #4-Analyze data for conclusion. #5- Share results so others can repeat experiment. |
| Define Parasitism | When one organism benefits at the expense of another. |
| What are the 3 symbiotic relationships? | Parasitism, Commensalism, Mutualism |
| What is a food web? | A model representing the many interconnected food chains & pathways in which energy flows through a group of organisms. |
| Define Commensalism | When on organism benefits & the other organism is neither helped nor harmed. |
| Define Mutulaism | Relationship between 2 or more organisms that live closely together and benefit from each other. |
| Define Niche | Is the role or position that an organism has in its environment |
| Define Competition | when more than 1 organism uses a resource at the same time. |
| Define Ecosystem | Biological community and all of the abiotic factors that affect it |
| Define Climate | Avergae weather conditions in an area, including Temp.and precipitation |
| Define Habitat | Area where organism lives |
| Define Community | A group of interacting populations that occupy the same area at the same time. |
| Define Population | Indidivual organisms of a single species that share the same geographic location at the same time. |
| Where does all energy ultimately come from? | Sun and plants |
| Describe an ecological pyramid. (Include the different levels.) | To show the relative amounts of energy, biomass, or numers of organism at each trophic level in an ecosystem. |
| What happens when CO2 gets trapped in the atmosphere? | It discipates in the ozone layer |
| What is the difference between an abiotic and biotic factor | Abiotic-Nonliving factors in an organism's environment. Biotic- living factors |
| Explain a predator-prey relationship | Predator pursues and eats the prey.Prey- is the organism that is being pursued |
| What is the function of ozone | Is a protective layer in the atmosphere that absorbs most of the harmful UV radiation from the sun. |
| Explain the difference between primary & secondary succession? | Primary-A community in an area with rocks and no topsoil. (Lichen) Secondary-The orderly predicatable change that takes place after a community of organisms have been removed but the soil is still in tact. |
| What is a climax community? | Mature community that results when there is little change in the compostion of species. |
| What is a K-Strategist? | Produce on a few offspring that have a better chance of living to reproductine age (Humans) |
| What is a R-Strategist? | Producs as many offspring as possible in a short time. (Spiders & Bees) |
| Describe nitrogen fixation | The process of capture & conversation of nitrogen into a form that is usable by plants. |
| Describe Denitrification | some soil bacteria convert fixed nitrogen compounds back into nitrogen gas, which returns it to the atmosphere |
| What does manure and fertilizer do (to soil & plants)? | It improves soil structure and plant growth |
| What is exponential growth? Give example | a result of postive population growth at a constant rate (the world population) |
| What is logistic growth? Give example | Where by the growth raste declines as the population increases (Japan) |
| What biome would have the following conditions: Broad leaf trees, mosses, orchids, 20-25 temp., and . 200 cm of rain per year | Tropical rain forest |
Created by:
garrettamey
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