science education teaching

Year 7 Topic Test Energy changes Questions paper (Do not write on this paper) Section A: Multiple choice 1). The statement which is INCORRECT is: a. Energy is the ability to do work. b. Energy makes things happen. c. Energy causes changes. d. Energy is lost when it changes forms. 2). The unit of measurement of energy is the: a. joule b. centimeter c. volt d. ampere 3). Electrical energy is the movement of: a. heat b. electrons c. light d. radiation 4). The type of potential energy stored in a spring when compressed (squeezed), is: a. elastic b. gravitational c. chemical d. kinetic 5). The “law of conservation of energy” states: a. we should always turn off lights when not in use. b. energy cannot be created or destroyed, just change form. c. electricity should be produced by using solar cells d. all energy must return to the earth. 6). Rice (or bits of paper) was placed in a beaker of water to show how the heat moved through the water. The arrows show the way the rice moved. Heat is moving through the water using the process of : a. reflection b. conduction c. radiation d. convection 7). Which of the following involves an energy change from one form to another? a. wood burning b. wind blowing leaves from the tree to the ground c. lightening causing a fire d. all of the above 8). All animals get their energy from food. The chemical energy stored in food originally comes from: a. the Sun b. the water used to grow the plant c. the soil used to grow plants d. the chloroplasts in the leaves of plants 9).The nuclear reaction which produces radiant energy on the sun is called: a. combustion b. lightening c. friction d. fusion 10). The type of heat transfer that does not need a material is: a. convection b. conduction c. radiation d. reduction Section B: Cloze Passage Complete the following passage with the words given below. Some words may be used more than once. store, gravitational. potential, kinetic, chemical 11). Energy which is stored is called ____________ energy. 12). A boulder rolling downhill is losing __________ energy, but gaining ___________ energy. 13). Burning coal changes ___________into heat and light energy. 14). Springs can _________ energy which can be released later. 15). When a car is moving it has __________ energy. Section C: True or False Answer the following questions True or False. 16). Light needs a material to travel through. 17). Living things need energy. 18). Energy cannot be stored. 19). Electricity is a type of energy. 20). Only moving things have energy. Section D: Short answer 21). Identify the three ways in which heat may be transferred. 22). How fast does light travel? 23). Identify the two main types of energy. 24). State the law of conservation of energy. 25).What forms of energy do the following have? a. a burning match b. ocean waves c. a slice of bread d. a wound up toy e. a TV (turned on) 26). Identify what is said to be the source of all energy on Earth. 27). Write a sentence about the first word using the other two. a. parachute b. food c. battery d. sound e. transformation potential, gravitational body, energy chemical, energy vacuum, travel electrical, heat 28). Describe the energy transformations that take place in the following situations. Remember, the energy may be transformed to more than one type or form of energy. For example; a CD player = chemical energy → sound energy a. toaster b. light globe c. a person parachuting out of an aeroplane. 29). Write a short paragraph on four things we can do to save energy in the home. 30). Using the information given in the Table, create a column graph. Step 1: Label the horizontal axis Age (years) Step 2: Level the vertical axis with Energy Use (megajoules). Step 3: Plot (using columns) the Male and Female information, make sure to use two different colours or patterns. Step 4: Complete the Key. Table: Daily Human Energy Use Age (years) 0 3 6 9 12 15 18 21 24 Male (megajoules) 5 6 7.5 9.5 11 12.5 12.6 12.6 12 Female (megajoules ) 5 6 7.5 9 9.7 9.7 9.5 9.2 8.8 Year 7 Topic Test Energy Changes Answer Sheet Class:______________________ Section A: Multiple choice 1). 2). 3). 4). 5). 6). 7). 8). 9). a. a. a. a. a. a. a. a. a. b. b. b. b. b. b. b. b. b. b. c. c. c. c. c. c. c. c. c. c. d. d. d. d. d. d. d. d. d. d. Name: ______________________ 10). a. Section B: Cloze Passage 11). __________________ 12). __________________ 13). __________________ 14). __________________ 15). __________________ Section C: True or False 16). __________________ 17). __________________ 18). __________________ 19). __________________ 20). __________________ Section D: Short answer 21). __________________ __________________ __________________ 22). __________________ 23). _________________ and _______________ 24). ______________________________________________________________________________ _____________________________________________________________________________ _ 25). a. ________________ b. _________________ c. _________________ d. _________________ e. _________________ 26). ____________________ 27). a. __________________________________________________________________________ ____________________________________________________________________________ b. __________________________________________________________________________ ____________________________________________________________________________ c. __________________________________________________________________________ ____________________________________________________________________________ d. __________________________________________________________________________ ____________________________________________________________________________ e. __________________________________________________________________________ ____________________________________________________________________________ 28). a. _________________________________________________________________________ b. _________________________________________________________________________ c. _________________________________________________________________________ 29). ______________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ 30). Table: Daily Human Energy Use Age (years) 0 3 6 9 12 15 18 21 24 Male (megajoule s) 5 6 7.5 9.5 11 12.5 12.6 12.6 12 Female (megajoul es) 5 6 7.5 9 9.7 9.7 9.5 9.2 8.8 Step 1: Label the horizontal axis Age (years) Step 2: Level the vertical axis with Energy Use (megajoules). Step 3: Plot (using columns) the Male and Female information, make sure to use two different colours or patterns. Step 4: Complete the Key