Class 4 Science Chapter 5 Test 2 Welcome to your Class 4 Science Chapter 5 Test 2 1. To hear a clear echo, the reflecting surface should be at least _______meters away from the source of sound. 7 17 27 37 2. Heat is a form of ________. Matter Energy Coal Oil 3. The symbol of Fahrenheit scale is _______ 0F oC oFa oCd 4. Sound needs some _________ to travel. Vacuum Light Medium None of these 5. Sound cannot travel in________. Vacuum Iron Medium None of these 6. Doctors usually measure temperature in _______ scale. Centigrade Fahrenheit Kelvin None of these 7. When the object is cold, its temperature _______ Increases Decreases Both at the same time None of these 8. In thermometer, ______ present in its bulb. Mercury Alcohol Both a & b None of these 9. When sound bounces back from an object (reflects) at a certain distance and we hear it again, it is called ____. Real sound No sound Echo None of these 10. To describe the condition of weather, _______ is used. 0F oC oFa oCd 11. The symbol of degree centigrade is _______ 0F oC oD oCd 12. The _________ present in our throat produce sound. vocal cards Mic system No cards Simple cards 13. The instrument used to measure temperature is called ______. Temperature Energy Thermometer None of these Time is Up! Time's up
