Name: Grade 4 Date: Q1. Choose the correct word from the box to complete the following sentences.

Transcription

1 Greenwood International School Science Revision Worksheet Semester-1 Grade 4 Name: Grade 4 Date: Q1. Choose the correct word from the box to complete the following sentences. in motion- energy transfer - energy- heat energy sun- chemical energysound energy thermometer - light- collision A. is the ability to cause change in matter. B. is a natural source of energy. C. Kinetic energy is the energy. D. Rubbing hands together produces. E. Batteries stores. F. The movement of energy from place to place or from object to object is called. G. We can see energy. H. The energy that results from vibrations that travel through air is. I. The instrument used to measure temperature is. J. When two objects bump into each other it is called. PAGE 1

2 Q.2 Write True if the statement is correct, and False if not. A. Sun gives solar energy. B. AA battery is used in calculator. C. A moving car is an example of energy at rest. D. Warming hands on a cup of hot chocolate is an example of how heat can transfer by touching an object. E. You can feel heat energy. F. Potential energy is an energy that moves from a warmer object to a cooler object. G. If sound waves combine in a pleasing way, they are said to be in harmony. H. Crest is the distance between crests or troughs. I. The top of the wave is called amplitude. J. When light hits two transparent objects, the path of light will bend. PAGE 2

3 Q3. Label the parts of the wave. Q4. Put a check (/) whether the following has high amplitude or low amplitude. High Amplitude Low Amplitude Fire crackling Fireworks exploding Birds chirping Water dripping PAGE 3

4 Q5. Identify the pictures as an opaque, transparent or translucent object. a. broccoli b. clear eyeglasses c. Science Book d. bubble wrap Q6. Look at the picture below. Identify and name the two objects that have collided. A. B. Q7. Order the process of how we see objects. Number them from 1-4. a. The image will change into signals. b. Light will reflect off the object and enter the eye. c. The signals will travel to the brain and you will see the object. PAGE 4

5 d. The image will be formed on the focal point. Q8. Match the following. Write the number that represents your answer. A. Refraction 1. bouncing of light wave B. Concave 2. lenses focus light into a single point C. Hieroglyphics 3. window glass D. Smoke signals 4. lenses cause light to spread out E. Pictographs 5. Wall F. Opaque 6. bending of light wave G. Scytale 7. painted in caves H. Translucent 8. used by Ancient Chinese I. Reflection 9. symbols for ideas used by early Egyptians J. Convex 10. coded message wrapped around a tube Q9. Classify the examples by writing U if it has up and down waves and BF if it has back and forth waves. A. guitar being played B. sunlight coming through a window C. bell being rung D. ultrasound of a human heart E. boat bobbing in the water PAGE 5

6 Q10. Look at the picture below then answer the question that follow. A. Is the picture shows reflection or refraction? B. Explain your answer. Q11. Use the code key below to decode the message A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Message: Decode: Q12. Number the steps from 1-4 in order to show how a message would get from your cell phone to your friend s cell phone. relay friend s cell phone from your cell phone to the tower close to your cell phone tower near your friend s cell phone PAGE 6

7 Science Revision Answer Key Q1. Q2. A. energy A. True B. sun B. False C. in motion C. False D. heat energy D. True E. chemical energy E. True F. energy transfer F. False G. light G. True H. sound energy H. False I. thermometer I. False J. collision J. True Q3. crest amplitude trough wavelength Q4. High Amplitude Fire crackling / Fireworks exploding / Birds chirping / Water dripping / Low Amplitude PAGE 7

8 Q5. A. opaque B. transparent C. opaque D. translucent Q6. A. baseball bat B. baseball Q7. A. 3 B. 1 C. 4 D. 2 Q8. Q9. A. 6 A. bf B. 4 B. up C. 9 C. bf D. 8 D. bf E. 7 E. up F. 5 G. 10 H. 3 I. 1 J. 2 Q10. Refraction. When light passes through 2 transparent objects, the light bends. Q11. Science is fun. Q PAGE 8