1. Jill made the table below during her research on aquatic zones and living organisms. Based on Jill s observations, which conclusion could you draw?
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1 1. Jill made the table below during her research on aquatic zones and living organisms. Based on Jill s observations, which conclusion could you draw? A. Organisms in the intertidal zone must be able to withstand very cold water. B. There are no producers in the benthic zone that rely on photosynthesis. C. Organisms in the benthic zone must be able to tolerate large amounts of oxygen. D. The warm water and abundant sunlight in the nertic zone limits the plankton population.
2 SC.912.L.17.2 Explain the general distribution of life in aquatic systems as a function of chemistry, geography, light, depth, salinity, and temperature. ESSENTIAL QUESTION How is life distributed in aquatic ecosystems?
3 Explain the general distribution of life in aquatic systems as a function of chemistry, geography, light, depth, salinity, and temperature. These factors are limited to water depth, latitude, temperature, underwater topography, and proximity to land.
4 Geography? The study of physical features of the Earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources, land use, and industries.
5 Pressure increases as depth increases. What would happen if we traveled 1,000 meters below the ocean s surface? Why? Most organisms with gas-filled spaces (like us) would be crushed by the pressures that other deep-sea life experience. Many creatures have no problem living in the deep ocean. Why? Most organisms living in the deep ocean are largely water and water is incompressible. Without gas-filled spaces, organisms in the great deep are less affected by pressure. So think back to the standard, what does this tell us about the general distribution of life as a function of depth?
6 If you were going diving, what would happen to the amount of light as you deeper? There is less light. What chemical process is light important to as a reactant? Photosynthesis Why is this process important? It is used by plants, algae and certain bacteria to harness energy from sunlight into chemical energy. One way aquatic ecosystems can be divided is into two zones called the PHOTIC zone and APHOTIC zone. Check for Understanding What is going to be found in the photic zone that is not found in the aphotic zone?
7 Between winter and summer, why does the average temperature on land change much more than the average temperature of water?
8 If you were to get into a submarine and dive deep into the ocean, what would happen to the temperature of the water and why? It would get colder because of the absence of sunlight. What else can influence the temperature of water besides depth and why? Latitude - distance from the equator. Due to the curvature of the Earth, temperatures will drop in areas farther away from the equator. Also, in areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.
9 Checks for Understanding What is the relationship between light and depth of the ocean? How does latitude and ocean depth affect temperature? How do these differences affect living organisms?
10 Explain the general distribution of life in aquatic systems as a function of chemistry, geography, light, depth, salinity, and temperature. These factors are limited to ph, oxygen, carbon dioxide, nitrogen, phosphorus, and salinity.
11 Chemistry? The branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
12 If the ph of water is too high or too low, the aquatic organisms living within it will die. The majority of aquatic creatures prefer a ph range of , though some can live in water with ph levels outside of this range.
13 Oxygen Aquatic environments are low oxygen distribution environments. Oxygen is necessary for the process of respiration in marine organisms. Where in aquatic ecosystems would you expect to find more oxygen? Why? Carbon dioxide If CO 2 levels increase, it can react with water molecules to decrease the water s ph. What process is carbon dioxide important to as a reactant? Cellular respiration Other materials such as nitrogen and phosphorus are important nutrients.
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15 Salinity is the measure of all the salts dissolved in water. Aquatic ecosystems include bodies of water varying in salinity fresh water, salt water and estuaries. Global warming It causes the icebergs to melt, adding freshwater back to the oceans. The additional freshwater will decrease the amount of salt in the surrounding water. In areas with high evaporation, the water will have a higher salinity because the salt is not evaporated with the water.
16 Organisms have specific salinity ranges in which they can survive. Give an example of the three types of aquatic environments in Jacksonville.
17 Checks for Understanding What can change the distribution of oxygen, carbon dioxide and ph? What portions of the globe would have a higher than normal salinity?
18 Finding Nemo Walk to School Nemo's First Time in the Tank Describe 3 differences between the 2 different aquatic ecosystems Nemo experiences. Should Nemo and the other fish technically have survived this change in surrounding? Why or why not? (use your notes to answer this question in 3-4 sentences citing specific vocab words)
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20 1. Jill made the table below during her research on aquatic zones and living organisms. Based on Jill s observations, which conclusion could you draw? A. Organisms in the intertidal zone must be able to withstand very cold water. B. There are no producers in the benthic zone that rely on photosynthesis. C. Organisms in the benthic zone must be able to tolerate large amounts of oxygen. D. The warm water and abundant sunlight in the nertic zone limits the plankton population.
21 1. Jill made the table below during her research on aquatic zones and living organisms. Based on Jill s observations, which conclusion could you draw? A. Organisms in the intertidal zone must be able to withstand very cold water. B. There are no producers in the benthic zone that rely on photosynthesis. C. Organisms in the benthic zone must be able to tolerate large amounts of oxygen. D. The warm water and abundant sunlight in the nertic zone limits the plankton population.
22 No talking or electronics = 0 Keep your eyes on your own paper Raise your hand if you have a question Flip paper over, put head down when finished
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