Lesson 4 Laboratory: Photosynthesis Introduction: Elodea is a species of aquatic plant often called waterweed. Like other plants‚ Elodea absorbs carbon dioxide and releases oxygen during photosynthesis. In this lab‚ an Elodea specimen is submerged in water under a lamp with a filter that can change the color of the light. We will measure Elodea’s rate of photosynthesis by measuring the amount of oxygen it produces. We will investigate the effects of light color and light intensity on Elodea’s rate
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Chapter 1 - Scientific Methods Objectives 1. Demonstrate a basic knowledge of classroom/science safety. 2. Understand the purpose of a hypothesis‚ and identify when a hypothesis should be used. 3. Be able to identify the independent and dependent variables in a formalized hypothesis. 4. Differentiate between an observation and an inference. 5. Contrast quantitative and qualitative observations. 6. Given a data table‚ draw and label a graph. Including a title‚ labeled units‚ and legend. 7
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that help it carry out basic functions that are necessary to maintain life and proper photosynthesis. The first and outermost layer of tissue is called the dermal layer. This is the plant’s ‘skin’ and serves the plant mainly as a source of protection. Also present in the dermal layer of the leaves are stomata‚ which are tiny openings that allow carbon dioxide to enter and complete the Calvin Cycle of photosynthesis. The innermost layer of the plant is called the vascular tissue and is composed of phloem
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first ensure that the ecosystem’s foundation is remaining strong‚ a foundation known as photosynthesis. When photosynthesis is functioning as it should‚ in its fullest capacity‚ all organisms benefit from it in some way. Furthermore‚ scientists aim to better understand the photosynthetic process to help enhance the efficiency and quality of life on Earth. By fully understanding the function of photosynthesis‚ some environmental adjustments can then be made to refine the photosynthetic process. In
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Section November 7‚ 2012 Abstract The effect of water and fertilizer on corn seedlings was examined. It was hypothesized before the experiment that enough water with sunlight and air should make the plants grow healthy. It has to do with photosynthesis. Fertilizer is also going to make the plants grow much faster; this is because of the nutrients in it. The experiment took about four to six weeks to complete; it took some days for the seed to germinate before planting. The corn was growing there
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Questions 1. Based on what you already know about photosynthesis‚ develop a testable hypothesis to explain the influence of an increase in light intensity on the photosynthetic rate in tomato leaves. 2. What is the relationship between an increase in light intensity and photosynthetic rate in tomato leaves? Does this relationship support the hypothesis that you formulated? As light intensity increases then the rate of photosynthesis increases linearly until a point is reached when the
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and close to allow the absorption of carbon dioxide and release of oxygen. Photosynthesis is the process by which plants convert sunlight into suitable energy. (http://www.yourdictionary.com/photosynthesis) Photosynthesis actually takes place in the stomata where carbon dioxide and oxygen enter and leave the plant. Chlorophyll is the green pigment of leaves and plants that’s in charge of absorbing light for photosynthesis. (http://dictionary.reference.com/browse/chlorophyll) All chlorophyll plants
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oxygen producer plant. The alternative hypothesis was that the rate of photosynthesis increases as the distance of the light decreases. This is because light energy can excites chlorophyll molecules more clorophyll mulcoulse as the distance of the light decreases. Photosynthesis is a process in which the energy of light is used to produce organic molecules. In this process Oxygen is released; therefore the rate of photosynthesis can be calculated by measuring the rate of oxygen
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Life (#1 – 4) 1. What is the difference between a hypothesis and a scientific Theory? Between a hypothesis and a prediction? What kinds of hypotheses are useful for scientific investigations that try to explain the natural world‚ and which are not? Give one or more examples of hypotheses that are and are not scientifically useful. (a.) A scientific theory has two components; a pattern‚ and a process that creates the pattern. A hypothesis is a testable statement that explains a phenomenon of
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REPORT HYPOTHESIS 1: Plants transpire the most when the environment has light and less humidity JUSTIFICATION: Water evaporates more readily because light stimulates the opening of the stomata and photosynthesis would occur. HYPOTHESIS 2: Transpiration would occur the second most when there’s light and lots of humidity. JUSTIFICATION: The light would allow photosynthesis to occur and the stomata to open but little if any diffusion of water out the leaf would occur. HYPOTHESIS 3: Plants
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