1. Bats send out and receive _____ Waves reflected by the prey and other obstacles.
Answer: Ultrasonic
2. The term enzyme was first coined by
Answer: William Kuhne
3. The SI Unit of amplitude is _______
Answer: Metre
4. Which set of conditions represents easiest way to liquify gas ?
Answer: Low Temperature, High pressure
5. Artificial rain is caused by spraying small pellets of which one is over clouds?
Answer: NaOH
6. Galvanization is deposition of____
Answer: Zinc of iron
7. Equal volumes of different gases at any definite temperature and pressure have
Answer: Equal no. of molecules
8. The Principle on which a stethoscope works is ______
Answer: Multiple Reflection
9. _______ of air in the atmosphere is Oxygen
Answer: 20%
10. About ______ of our body is made up of water.
Answer: 78%
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