Science Quiz - 9
(Q & A)
Q1: Which organism is used in production of alcohol ?
Q2: Gasohol is a combination of gasoline and ?
Answer: Ethyl alcohol
Q3: Oil spreads over the surface of water because ...?
Answer: Oil has less surface tension than water
Q4: The working principle of a Washing Machine is?
Q5: The sounds having a frequency of 20 hertz to 20,000 hertz are known as
Answer: Audible sounds
Q6: Pure water is bad conductor of electricity because it is
Answer: Poor ionisation
Q7: Which metal remains in liquid form under normal conditions ?
Q8: Potassium Permanganate is used for purifying drinking water, because ...?
Answer: It is an oxidising agent and has antiseptic properties.
Q9: The main constituents of pearls are?
Answer: Calcium carbonate and magnesium carbonate
Q10: The branch of physiology and medicine concerned with heart is known as
Q11: Dyslexia is associated with ...?
Answer: Reading disorder
Q12: Aristotle reasoned that the heavens were composed of a fifth element, called _____?
Q13: What is a selenologist?
Answer: A selenologist is a scientist who studies the moon.
Q14: Who wrote the famous book Systema Naturae and talked about scientific naming system of living organisms?
Answer: Carolus Linnaeus
Q15: Name the planet that contains the Great Red Spot that is about 13,000 kilometers wide and 32,000 lm long.
Q16: Name the world’s largest flower.
Answer: Rafflesia arnoldi
Q17: Who showed that the planets did not orbit the sun in circles but in perfect ellipses?
Q18: Which plant tissue mainly responsible for making woody parts of the plant?
Q19: Name the the acid that makes unripe apples sour.
Answer: Malic acid
Q20. Name the scientist who introduced a classification scheme for plants in 1667. He grouped them into monocots and dicots.
Answer: John Ray
Q21: What is hypothesis?
Answer: A hypothesis is a scientific idea that can be tested.
Q22: What is the the scientific SI unit for energy?
Q23: Name the physical quantities that have magnitude and direction.
Answer: Vector quantities.
Q24: The weight of an object can be thought of as acting at a single point, it is called as?
Answer: Center of mass
Q25: Which law law states that every force is accompanied by an equal force acting in the opposite direction?
Answer: Newton's third law of motion.