Biology Chapter 3 CRQ's
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- 17) What is photosynthesis? Pg 68
- Photosynthesis-autotrops use light energy to power chemical reactions that convert carbon dioxide & H2O into O and energy-rich carbo's such as sugars & starches.
- 18) Write the chemical equation for photosynthesis.
- Carbon Dioxide + H2O -> Carbohydrates & Oxygen
- 19) Who are the leading autotrophs on land? In water?
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Land-plants main autotrophs
Water-ecosystems - 20) What is the difference between chemosynthesis and photosynthesis?
- Chemosysnthesis-organisms use chemical energy to produce carbohydrates. While photosynthesis uses light energy to power chemical reactions that convert carbon dioxide & H2O into O + enenrgy-rich carbo's (sugars + starches)
- 21) Another name for consumers is ___________. List 5 types and give examples for each type. Pg 69
- ?
- 4) List the levels of organization in our biosphere from least complex to most complex.
- Individual, population, community, ecosystem, biome, and biosphere
- 5) If a scientist wanted to focus his study on a group of species in an area, what level would he/she study?
- Populations would be the level a scientist would want to study, if his study focused on a group of species in one area.
- 8) Why do scientist use models to study ecological changes?
- Scientist use models to study ecological changes because predictions made by ecological models are often tested by further observations and experiments.
- 1) What is ecology?
- Ecology is the scientific study of interactions among organisms & btw organisms and their environment or surroundings.
- 22) What does a food chain represent?
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- 23) Draw a diagram of a food chain in which you are a member.
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- 24) Which group of organisms is always found at the base of a food chain or food web?
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- 25) What is a food web? Pg 70
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- 26) Food webs are broken down to levels. What are the levels called and what are in each level?
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- 27) According to the diagram what does the Heron feed on? Pg 71
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- 28) What proportion of energy is transferred to each trophic level in an ecosystem. Pg 72.
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- 29) Describe the 3 types of ecological pyramids.
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- 30) see diagram.
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- 2) How are the words ecology, oikos and economy related?
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The words ecology, oikos & economy are all related.
Ecology is based on the word oikos, means house, which is the root of the word economy.
German biologist Ernst Haeckel, saw the living world as a household w/ an economy in which each organism plays a role. - 3) What does a biosphere contain?
- The bioshpere contains the combined portions of the planet in which all of life exists, including land, H2O + air/atmosphere.
- 6) List some tools scientist use to study the living world.
- Tools: binoculars, field guides, studies of DNA(identify bacteria in mud of coastal marshes),radio tags (to track migrating wildlife), and or use data gathered by satellites.
- 7) Describe the 3 basic methods of ecological research. Pg 65
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Observing-first step in asking ecological questions.ex. what species live here? How many individuals of each species are there?
Experimenting-used to test hypotheses. Some are conducted within natural ecosystems.
Modeling-ecologists make models to gain insight into complex phenomena such as the effects of global warming on ecosystems. - 9) How does a satellite collect data and convert it into an image? Pg 66
- Satellites are fitted w/optical sensors that can scan several bands of the electromagnetic spectrum & convert the bands into electrical signals. Signals processed through a computer & converted into digital values which are use to construct an image.
- 10) How can satellite use be beneficial to ecologist? Pg 67
- Satellite images can help ecologists to estimate the rate of a destruction that may occur ex. rain forest. They can cover every sq meter of the Earth's surface. Ecologist can work w/ local governemnts to slow the destruction of ecosystems.
- 11) Why do organisms need energy? List two uses of energy.
- Organisms need energy beacuse without a constant input, living systems cannot function. Sunlight, inorganic chemical compounds (mineral water-chemical energy).
- 12) How is sunlight important to most ecosystems?
- Sunlight is the main energy source for life on earth.
- 13) How much of the sun's energy is used by living things?
- A samll amount (less than 1%) of the sun's energy is used by living things.
- 14) If organisms don't rely on the sun for its energy, where does their energy come from?
- Some types of organisms rely on the energy stored in inorganic chemical compounds.
- 15) What are autotrophs? List 3 examples.
- Organisms that capture energy from sunlight/chemicals and use that energy to produce their food. ex. plants, some algae, & certain bacteria.
- 16) Why are autotrophs called producers?
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Because producers do the same thing as autotrophs. They can use energy to produce their own food.
simple inorganic compounds->complex organic molecules->living tissue