TEKS Badge Book Unit 1.2 Matter and Energy in Ecosystems

Transcription

1 TEKS Badge Book Unit 1.2 Matter and Energy in Ecosystems Name Teacher Class Period Formula to calculate Percentage Correct: (# Correct Answers Total # of Questions) 100 Example: (8 10) 100 = 80% correct TEKS # Correct Answers per TEKS Total # of Questions per TEKS *Percentage Correct (use formula above) If percentage is below 70%, write RETEST in the box. Unit 1.2 Matter and Energy in Ecosystems Retest Percentage Correct If percentage is above 70% on either the test or retest, write BADGE in the box below 7.5A 7.5B 7.5C 7.6A Page 1 of 6

2 RETEST FORM made below a 70% on the following7th grade science objective(s):. Tutorials and a retest score above 70% are required to earn a badge for the objective(s). Final day to retest is. Return signed form by for a Yahoo ticket. Parent Signature Please visit Google Classroom for lesson resources and study assignment. Page 2 of 6

3 Process Skills 2A Plan and implement comparative and descriptive investigations. 2C Collect and record data using SI units (quantitative) and qualitative means such as labeled drawings, writing, and graphic organizers. 3B Use models to represent aspects of the natural world such as human body systems and plant and animal cells. 3C Identify advantages and limitations of models such as size, scale, properties, and materials. Word Bank biomass chemical energy compost consumer decay decomposition energy pyramid food chain food web matter organic compound photosynthesis producer radiant energy Unit 1.2 Matter and Energy in Ecosystems 7.5 Matter and Energy. The student knows that interactions occur between matter and energy. The student is expected to: 7.5A Recognize that radiant energy from the Sun is transformed into chemical energy through the process of photosynthesis. Radiant energy from the Sun drives much of the flow of energy throughout living systems due to the process of photosynthesis in producers. Page 3 of 6

4 Plants absorb radiant energy and use it to power chemical reactions that form new bonds between the elements in CO 2 and H 2 O making C 6 H 12 O 6 and releasing O 2. 6CO 2 + 6H 2 O Radiant Energy C 6 H 12 O 6 + 6O 2 Six molecules of carbon dioxide plus six molecules of water produces one molecule of glucose and six molecules of oxygen. Radiant energy is transformed through photosynthesis into chemical energy in the form of food carbohydrates, fats, and proteins. Energy from food undergoes transformations in organisms to power life processes while CO 2 and H 2 O are recycled through the carbon cycle. 7.5B Demonstrate and explain the cycling of matter within living systems such as in the decay of biomass in a compost bin. Biomass is the matter composing the bodies of organisms. As biomass decays, it breaks down the remains of organisms into smaller forms of matter through chemical changes. Biomass is returned to basic elements and compounds that may be recycled for use by producers. Decomposers play an important role in recycling matter. Organic compounds, composed of carbon and other elements, are recycled due to chemical changes that rearrange the elements for the particular needs of that living system. The process of decay of biomass provides nutrients to the soil for the uptake by plants through their roots.( CO 2, H 2 O, and phosphorus, nitrogen, sulfur, calcium, and iron) These natural fertilizers help plants form all the different kinds of organic compounds for life. When we use commercial fertilizers, they include these ingredients. Decomposition also releases energy stored in the biomass as heat. Matter also cycles within living systems as organisms transform the energy stored in food molecules through cellular respiration and release carbon dioxide and water. Page 4 of 6

5 Contrast the cycling of matter to the flow of energy in a community or ecosystem o Energy is not recycled. Energy flows through energy pyramids and food webs. o Matter is recycled. Diagram a cycle showing recycling of matter, such as water, carbon dioxide and oxygen, and nitrogen. 7.5C Diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids. Energy role of: o Producer/autotroph organism that makes its own food, such as a plant or photosynthetic algae o Consumer/heterotroph - an organism that feeds on other organisms Herbivore an animal that feeds on plants Carnivore an animal that feeds on other animals Omnivore an animal that feeds on both plants and animals o Decomposer bacteria and fungi are consumers that feed on dead organisms and waste material and in the process return important nutrients to the environment Transfer of Energy in Communities o Food chain path of food energy from the sun to the producer to a series of consumers in an ecosystem. Diagram with arrows shows energy flow Example: Food Chain Grass grasshopper frog snake Arrows in a food chain or food web point in the direction that energy is being passed from one organism to another o Food web is a complex system of energy flow through overlapping and interconnected food chains o Describe the effect of removing an organism from a simple food web Page 5 of 6

6 Energy pyramids show that only 10% of the energy stored by producers becomes part of the biomass in the bodies of the first level consumers. (The 10% Rule) o The remaining 90% is transformed for life activities or lost as heat to the environment [movement, growth and development, reproduction, etc.] o This 90% loss and 10% available to the next level continues until the top consumer level is reached o Energy pyramids show that food chains can only support a few top consumers within an ecosystem o Analyze the relative amount of energy the organisms in a food pyramid get from the producers. 7.6 Matter and energy. The student knows that matter has physical and chemical properties and can undergo physical and chemical change. The student is expected to: 7.6A Identify that organic compounds contain carbon and other elements such as hydrogen, oxygen, phosphorus, nitrogen or sulfur. All organic compounds [carbohydrates, fats, proteins] contain the elements carbon and hydrogen. Most also contain oxygen. Organisms also use nitrogen, phosphorus and sulfur to form cells and tissues. (SPONCH) Organic compounds are formed by producers that use carbon dioxide from the air and water from the soil to make food. Reinforce and review differences in compounds and elements. Identify key elements of organic compounds in chemical formulas such as glucose (C 6 H 12 O 6). Page 6 of 6