Disc Nat Science Exam Reviews Exam Questions with Correct Answers

The scientific method, which is very useful in many field besides science, is simply - ANSWER-A systematic way of evaluating evidence A scientific theory - ANSWER-Has been confirmed through repeated tests. A scientist recorded the time of sunrise every day for ten years. This is a method of gathering data by - ANSWER-observation. A scientist conducted experiments in which she measured the amount of the vitamin, folic acid, in food after heating the food to various temperatures. She graphed the data with temperature on one axis and folic acid content on the other axis; she found a negative correlation. According to the scientific method, what should be her next step? - ANSWER-Make a hypothesis In science every hypothesis must be tested by using it to make - ANSWER-a prediction. Which of the following statements would be true of the scientific method? - ANSWER-The scientific method is a continuous process by which people learn about the physical universe and share their knowledge with others. Suppose you read a magazine article about a new way to lose weight. Which of the following would make you think it may be credible? - ANSWER-The author references articles from scientific journals. Which of the following is in uniform motion? - ANSWER-a plane flying east at 400 miles per hour. A change in velocity is called - ANSWER-acceleration According to Newton's Laws, an object's acceleration - ANSWER-is proportional to the force acting on it and inversely proportional to its mass. Newton's second law tells us that the more massive an object being acted on by a given force, the greater the acceleration. - ANSWER-False A 100 gram golf ball and a 5000 gram bowling ball are held 10 meters above the ground. The gravitational potential energy - ANSWER-Is greater for the bowling ball A 100 gram golf ball and a 5000 gram bowling ball are dropped from a height of 10 meters at the same instant. When the balls are 5 meters from the ground - ANSWER-They both have the same velocity, but the bowling ball has greater kinetic energy