2 nd Quarter Test Review

Transcription

1 2 nd Quarter Test Review 1. Create a Venn diagram and add the following to the Venn diagram: a. Made from just one element b. Made from more than one element c. Forms through a chemical reaction Elements d. Found on the periodic table e. Essential for life f. Found on earth A E Compounds D F C 2. Hydrogen peroxide has the chemical formula H2 O2. What is the ratio of hydrogen atoms to oxygen atoms? 2:2 3. How many different elements are in the formula for hydrogen peroxide H2 O2? 2 4. What do the letters H and O stand for in the formula H2 O2 Elements 5. Robert mixed two chemicals and fizzing and bubbling occurred. What type of reaction occurred? _Chemical What new substance was formed? Gas 6. An unexpected color change is evidence that a _chemical reaction has occurred. 7. Leaves changing color in the fall is evidence that a _chemical reaction has occurred. 8. An antique silver tea pot tarnishes. This is evidence that a _chemical reaction has occurred. 9. List the following as chemical changes CC or physical changes PC a. Glass breaking _PC b. 2 liquids mixed together PC c. Sanding wood PC d. Vinegar and baking soda mixed together and fizzing occurs CC 10. What tool is used to measure the volume of a liquid? _Graduated Cylinder 11. What tool is used to measure the volume of a regular solid? _Ruler 1

2 Complete the table below (Look for a pattern!) Liquid (ml) Solid (g) Gas (g) X-A X X-C X-D X-E X-A_1.8 X-_100 X-C_125 X-D_25 X-E_ Solar energy (Panels)_ is the MOST practical way to supplement or add to the electrical power system. 13. Wind resource would be the MOST affected by changes in weather. 14. _Conduction -heat traveling through a solid. 15. _Convection -heat traveling through a liquid. 16. _Radiation - heat travelling through air (gas). 17. Law of Conservation of Energy_ states that energy changes form, but is not lost or gained. 18. Draw a bar graph to represent the following data. Days Temperatures 0 C

3 Label the following as ELEMENT (E) or Compound (C) 19. H E 20. CO_C 21. H2O_C 22. He_E 23. Fe2 E 24. What happens when sugar is heated? What type of reaction is this? It turns black because of a chemical reaction. 25. Label the diagram below with the following labels: A. Precipitate,. Liquid, C. Solid, D. Chemical Reaction, E. Physical Change. Some of the labels may be used more than one time and others may not be used at all. D A & C 3

4 26. Create a T-Chart labeled Physical Reactions and Chemical Reactions. Fill in the T-chart with the following: silver tarnishing, metal rusting, sanding wood, water separating into H and O, ice melting, combustion of wood. Sanding Wood Physical Reactions Chemical Reactions Silver Tarnishing, Metal rusting, Water separating into H and O, Combustion of wood Ice Melting 27. The temperature of water in a beaker is 10 C. Which action would cause the energy of the water to increase the most? a. Placing the beaker in a cabinet b. Placing the beaker in the sunlight c. Placing the beaker in front of a fan 28. A student is completing an investigation on types of heat transfer. For one part of the investigation, they place their hand on a cool window to feel the difference in thermal energy. When they are touching the glass, what type of heat transfer are they experiencing? a. Conduction b. Convection C. Radiation A 29. A flashlight battery has light energy, what type of energy does a campfire have? a. Thermal energy b. Electrical energy c. Nuclear energy A 4

5 30. Create a table labeled Advantages and Disadvantages. Fill in the Chart with the Resources, Advantages, and Disadvantages using the following: Radioactive Waste, Increases potential for flooding, Limited farm land available, Least negative effect on environment, Very concentrated, Expensive, Renewable, Renewable, Only located near hot spots (Plate Tectonics), and Unlimited. Resource Advantage Disadvantage Solar Least negative effect on Expensive the environment Nuclear Very concentrated Radioactive Waste Hydroelectric Renewable Increases potential for flooding iomass Renewable Limited farmland available Geothermal Unlimited Only located near hot spots (Plate Tectonics) 31. Thermal energy always moves from a. The atmosphere to objects on the ground. b. Objects of higher temperatures to objects of lower temperature. c. Objects from the ground to the atmosphere. d. Objects from lower temperatures to objects of higher temperature. 32. What form of energy transformation takes place in a ceiling fan? Electrical to Mechanical 33. Campfire emits heat through space. This is called? Radiation 34. Draw a picture of a geothermal power plant and what it utilizes inside the Earth. Plate Tectonics 5

6 35. What are the energy transformations happen within a computer running off battery power? Chemical Electrical - Light PAP Review Addition 1. Explain the energy transformations that take place in a rollercoaster ride. Electrical and mechanical energies drive the coaster car to the highest point of the hill then the force of gravity continues the motion of the car through the ride. 2. How does the sun s energy control the temperatures on Earth? Radiation from the Sun is absorbed by the molecules of the Earth s surface which warms the molecules of the air above it. 3. What are the energy transformations that take place when a candle is lit? Chemical light thermal (heat) 4. What are the energy transformations that take place when dough is cooked into bread? Thermal Chemical 6