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Transcript
Name __________________________________ Period ____________ Date __________ Mrs. Levin Review Questions 1 Scientific Method 1. What is a hypothesis? __a Testable if then because statement that is an educated guess about the results of your experiment 2. Three words every hypothesis needs are ________________if then because_______________________________________ 3. What ways can we represent data? _charts, data table, graph_ Cells and Microscopes 1. What are objective lenses? __________they magnify the specimen__________ 2. How do you determine total magnification? ___________multiply the eyepiece magnification (4) times the objective lens magnification (10, 40 or 100)________________________________________________ Try it: If your eyepiece is 10x magnification and your objective lens is 10x magnification, what is your total magnification? _10 X 10 = 100_ 3. Which knob do you turn to focus under LOW power only? Coarse focus only, fine focus only under high power Use the word box to label the cells. Cell membrane cytoplasm cell wall chloroplast nucleus vacuole Animal Cell 5_____ Cell membrane ____ 6_ vacuole _______ Plant Cell 9_ cell wall 7_ cytoplasm 8_ nucleus __ 10 vacuole 11. nucleus 12 chloroplast 13. Cell membrane 14. _ cytoplasm 15. What is the smallest unit of life? ____________________the cell___ 16. What are two parts found only in plant cells? cell wall and chloroplasts Name each part of the plant and animal cells shown on the previous page, and tell the function (job) of each part. Part Function Nucleus Directs cell activities Cell membrane Protects cell, controls what enters and leaves cell Vacuole storage Cell wall Structure support and protection Chloroplast Photosynthesis, making food from sunlight Cytoplasm Watery substance that cushions cell parts The Respiratory System 17. What is the function (job) of the respiratory system? ______________bring in oxygen and release carbon dioxide_____________ _______________________________________________________ 18. What muscle controls breathing? ____________diaphragm http://www.phschool.com/atschool/phsciexp/active_art/respiratory_system/index.htm l 19. What are alveoli? Where are they found and what do they do? _______tiny sacs that make up lungs____ _________________http://www.bmu.unimelb.edu.au/examples/gasxlung/__ 20. What two gases are exchanged in the alveoli? ____oxygen and carbon dioxide__ 21. How do gases move from the lungs into the bloodstream? __Oxygen goes through alveoli wall into blood, carbon dioxide goes from blood into the alveoli http://www.bmu.unimelb.edu.au/examples/gasxlung/ 22. What is the job of the circulatory system? ___transportation system of the body – it moves nutrients and oxygen and wastes throughout the body 23. What are the three parts of the circulatory system? ______blood vessels, heart, blood_____ 24. Which blood vessels carry blood away from the heart to the body cells? ____________arteries away_____________ 25. Which blood vessels carry blood toward the heart from the body cells? _________________veins________________ The Digestive System 1. What are the 3 functions (jobs) of the digestive system? a. Take in nutrients/Break up nutrients/eliminate solid wastes 2. Which organ makes enzymes which break down fats, carbohydrates, and proteins? _______liver, pancreas__________________ 3. Where are most of the nutrients from digested food absorbed into the bloodstream? _________small intestine____________________________ _______________________________________________________ 4. What is mechanical digestion? _________using muscles to break down food____for example teeth in mouth and muscles in the stomach____________________ _______________________________________________________ 5. What is chemical digestion? ______using chemicals to break down food for example stomach and small intestine and saliva in mouth__ _______________________________________________________ 6. Explain how chemical and mechanical digestion both take place in the mouth. _________saliva is a chemical in the mouth that breaks down starches into sugars, your jaw muscles chew and break down food ______________________________________________ _______________________________________________________ The Skeletal System 1. What are the five functions (jobs) of the skeletal system? Support, protection, shape, movement, makes blood cells, storage of calcium 2. What are the main organs of the skeletal system? __BONES!____and cartilage and ligaments____________________________ _______________________________________________________