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Year 8 Unit 2 POS 2014/15 December to end of February Taking care of the environment – plants help the environment (and us!) in many different ways. Key concept: Relationships Related concepts: interaction Global concepts: Scientific and technical innovations Statement of inquiry: We depend on plants - they are the lungs of the Earth. Inquiry question: How does your everyday life depend on plants? Month Topic Objectives Practicals/activities Resources Assessment Students should be able to: December (before Christmas) Gaseous Exchange • know the structure of the mammalian breathing system (larynx, trachea, epiglottis, bronchi, bronchioles, alveoli, pleural membranes, diaphragm and intercostal muscles) • understand how the structure of the alveoli and blood capillaries enable gaseous Y8 Unit 1 Creating lung model and producing an Science 3 49-58 Crit A, part D Video instructional video on the making and the working of the lung model Prac: Blowing into limewater to observe P1 exchange to occur and the importance of diffusion in gaseous exchange across the alveoli how carbon dioxide changes the colour of limewater Prac: Measuring lung capacity • understand the effects of smoke and air pollution on the breathing system • know that air breathed out contains more carbon dioxide and less oxygen than air breathed in January (after NY) Cellular Respiration • understand that aerobic Measuring respiration involves transferring breathing rate before Chapter 18a-b energy from glucose to a cell; and after climbing stairs. oxygen is needed and carbon dioxide is produced • state the word equation for change in Spotlight 8 Chapter 21d Chapter 22d Science 3: p 102 aerobic respiration Criterion B,C Independent and dependent variables Summative: Xtranormal video – Instructional video showing examples of independent ,dependent and control variables Biology For You Y8 Unit 1 P2 • appreciate the uses of Chapter 4 transferred energy to organisms Science 2: p 36,178,179 (e.g. movement, growth and warming the body) • understand that anaerobic respiration can occur in human Criterion B,C Summative: Lab Assignment Investigating how exercise affects heart rate Anaerobic respiration in yeast – balloon over a muscles, and that lactic acid is flask of sugar and yeast produced and later removed using solution, testing the oxygen collected gas with limewater Science 3: p 58 • appreciate that respiration occurs in all living cells •Understand that oxygen and nutrients are carried by blood and pumped around by the heart •Understand the Y8 Unit 1 P3 interdependence between plants and animals February Plant science • understand the significance of Iodine test for starch in Plant science booklet photosynthesis in making food normal and de-starched Spotlight 8 in leaves Chapter 24 a-c • appreciate that photosynthesis transfers energy from sunlight into energy in chemicals, such as glucose and starch • understand the significance of chlorophyll as a light-absorbing molecule Demonstration of pond Biology For You weed producing air Chapter 12 bubbles under water Celery in food dye and cut out stained xylem tubes Demo: potometer demonstration of • understand the requirements transpiration under for photosynthesis; the nature of normal windy and the products formed; the effects of conditions altering the conditions on the rate Y8 Unit 1 P4 of photosynthesis • write the word equation for photosynthesis Science 2: p35 • appreciate how the structure of a leaf enables photosynthesis to Microscopy: Nail varnish occur effectively imprint of stomata • be able to perform starch tests Microscopy: on leaves • understand how photosynthesis affects the concentrations of carbon dioxide and oxygen in prepared slides of plant structure Dissection of flowers to identify flower parts Science 2: p174 to 183 water or the atmosphere • understand how gaseous exchange occurs in plants • appreciate the variety of Y8 Unit 1 P5 factors that limit the rate of photosynthesis, and ways of overcoming the limitations when growing plants for food or other uses • understand how plants absorb water • explain how different environmental factors affect the rate of water absorption by plants • label flower parts and describe their functions • understand how flowering plants reproduce by describing the Criterion A Plant science and Cellular Respiration Summative: Examination Written test processes of pollination, fertilization, and seed dispersal Y8 Unit 1 P6