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Nawabegh Al-Riyadh International School Name: Quarter: 4 Date: Week # 16 Subject: Science Grade: 6 Revision sheets Q1. Choose the correct answer. 1. When an object moves through a liquid or gas, what type of force opposes its motion? a. continuous b. thrust c. drag 2. Which is not an example of organic compound found in the human body? a. protein b. water c. lipid 3. Friction between a skateboard wheel and the surface produces _________________. a. kinetic energy b. heat energy c. potential energy 4. As the amplitude of a sound wave increases, its_______________________. a. pitch increases b. volume decreases c. volume increases 5. Which type of force is applied when a moving tennis ball is hit by a tennis racket? a. lift b. momentary c. continuous 6. Proteins are composed of substances called____________________. a. lipids b. carbohydrates c. amino acids 7. Which measures the average kinetic energy of the molecules in a substance? a. temperature b. velocity c. calories 8. When a force is constantly applied to an object, it is called a __________________ force. a. lift b. momentary c. continuous 9. If you know the speed and direction of an object, what could you find? a. momentum b. velocity c. apparent motion 10.What is the name of the upward force that allows a plane to fly? a. lift b. drag c. potential 11.Newton's third law of motion states that for every action force there is an equal and opposite ____________________. a. reaction force b. reaction mass c. reaction acceleration 12.A change in an object's position is called__________________. a. motion b. velocity c. acceleration 13.Which type of organic compounds can store and release more energy than other organic compounds? b. carbohydrates b. lipids c. proteins Page 1 of 6 Q2. Write “True” or “False”. 1. Apparent motion is the way something appears, or seems, to move. __________ 2. A tuning fork produces compressional waves in the air. __________ 3. Energy transformation takes place only when kinetic energy is converted into potential energy. __________ 4. To calculate the speed, you have to multiply the distance with the time. __________ 5. Weight is the downward force of Earth's gravity on all objects. __________ 6. Energy can be stored and released in many ways. __________ 7. To find an object's velocity, you must know the speed and direction of the moving object. __________ 8. The metric unit which measures force is the Newton. __________ 9. Troughs are the highest points of a wave. __________ 10.Power is expressed in joules per second. _________ 11.Potential energy can be converted into kinetic energy. __________ 12.To calculate work, multiply the force by the distance. _________ 13.There are three forms of energy. __________ Q3. Match each term on the right to its meaning on the left. Write the letter on the blank. ________1. a molded material that contains carbon and can retain its shape A. distance ________2. the length between two places B. potential energy ________3. the mass of an object multiplied by its velocity C. plastic ________4. the state of being without weight D. momentum ________5. the energy stored in an object or a material E. weightlessness Q4. Write a scientific term that describes each sentence. 1. a wave that moves matter back and forth as it travels through a medium ______________________ 2. a physical law that states that an object's acceleration depends on the object's mass and the amount of net force applied to it _____________________ 3. the bouncing of a wave off an object, changing its direction of travel ______________________ Page 2 of 6 4. a force that opposes the motion of an object in contact with a surface _____________________ 5. how fast an object's position changes with time at any given moment ____________ 6. the ability to do work ______________ Q5. Fill in the blanks. 1. ___________________ is the chemical building block of all known living things. 2. A physical law stating that the planets, the stars, and the Sun, all exert gravitational forces is the law of ______________________________. 3. _________________ is the location of an object compared with things around it. 4. A change in velocity of an object over time is called ____________________. 5. The kinetic heat energy in a substance is called ____________________. 6. ________________ is the height of a wave from its trough or crest to its midpoint. 7. The law of conservation of energy states that energy may change form but it cannot be ________________ or ________________. 8. Doppler Effect is the change in a sound's _____________ if its source or recipient is in motion. 9. Most plastics are __________________, or made by people. 10. To calculate power, you must divide work by_________________. 11.An organic compound that is rich in energy and often stored in your body as fat is a ________________. 12.Sound waves cannot travel through __________________. 13.____________________ is a natural gas that is used to heat homes. 14.When a hair dryer is turned on, the electrical energy is transformed into __________________ energy. 15.Sugars and starches are ______________________. 16.The units of work done is newton meters, which is also called as______________. 17.Another name for energy of motion is ______________________. 18.Volume is measured in units called ________________. Page 3 of 6 Q6. Draw and label a compressional wave. Q7. Define the following. 1. force ______________________________________________________________________ ______________________________________________________________________ 2. newton's first law of motion ______________________________________________________________________ ______________________________________________________________________ 3. transverse wave ______________________________________________________________________ ______________________________________________________________________ 4. compression ______________________________________________________________________ ______________________________________________________________________ 5. power ______________________________________________________________________ ______________________________________________________________________ Page 4 of 6 6. kinetic energy ______________________________________________________________________ ______________________________________________________________________ 7. rarefaction ______________________________________________________________________ ______________________________________________________________________ 8. velocity ______________________________________________________________________ ______________________________________________________________________ Q8. Answer the following questions. 1. How do waves cause sound? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 2. How are forces and motion related? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 3. How are carbon compounds important? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ Page 5 of 6 4. What causes motion to change? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ 5. What are work, energy, and power? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ Page 6 of 6