Name: Gr 8 Date: Grade 8 Exam Review Package * THIS IS NOT A DEFINITIVE GUIDE FOR THE EXAM, BUT A STARTING POINT. PLEASE STUDY AS WELL AS COMPLETE THIS REVIEW! * All of the exam material can be found in this package in some way shape or form. The format of the exam is as follows: Section A - Matching - 25 points Section B - True or False - 25 points Section C - Short Answer - 30 points Section D - Long Answer - 20 points - 4 questions, choose 2 Total - 100 Marks Systems in Action 1. Rhonda, an astronaut, weighs 60kg on Earth. Her mission takes her to the moon where the gravitational pull is 1.6 N/kg. Calculate her force of gravity on the Earth and the moon. 2. Donald puts 200J of force into a wrench to remove a screw. If the screw then moves 0.5m with 250N of force, what was the efficiency of this system?Fluids 3. Compare and contrast pneumatics and hydraulics. Pneumatics Hydraulics 4. What are some of the uses of fluids (hint: they can transport solids)5. Complete the following chart: State Solid Liquid Gas Diagram of Particles Spaces between particles Forces of attraction between particles 6. Compare and contrast gasses and liquids: Gas Liquid7. List the 6 tenets of particle theory: 8. Temperature affects both pressure and viscosity. Explain what effect temperature has on pressure and viscosity, and illustrate, using particle theory, why temperature has the effect it has. 9. Why do fluids exert more pressure the deeper the observers travels into the fluid ?10. A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper? Solve this in the box below, and include all steps and units! 11. In the box below, calculate the density of a 795g mass of iron that has a volume of 106cm'. Include all units and steps. 12. Why is the extraction of oil, a valuable fluid, dangerous to the environment and to those who mine it?Water Systems 13. Explain why Point Pelee is a microclimate. 14. Label the following diagram: Return flow 15. Why can't an aquifer have too many wells? 16. What problems arise with salt water intrusion?17. Outline the steps required to purify potable water, and to treat waste water before it returns to the environment. 18. In space below draw and describe how a sink hole can form