MTTC Integrated Science (Primary) TOP Questions and Correct Answers 2024

control group - In an experiment, the group that is not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment. Scientific Method - A series of steps followed to solve problems including collecting data, formulating a hypothesis, testing the hypothesis, and stating conclusions. independent variable - The experimental factor that is manipulated; the variable whose effect is being studied. dependent variable - The outcome factor; the variable that may change in response to manipulations of the independent variable. scientific theory - Must be repeatable. Possible to be disproved and capable of change. sampling and sample size - Random sampling is the preferred, but isn't always possible. A large sample will yield the most accurate information. manipulating variables - Only one variable should be manipulated at a time. hypothesis - A testable prediction, often implied by a theory scientific law - A statement that describes what scientists expect to happen every time under a particular set of conditions model - A representation of an object or event mean - average median - Middle number mode - The value that occurs most frequently in a given data set. range - the difference between the highest and lowest scores in a distribution standard deviation - a computed measure of how much scores vary around the mean score how to respond to a lab accident - in extreme cases, call 911 response to fire in a beaker or flask - Do not use a fire extinguisher. Just place a watch glass or wet towel over it to cut off Oxygen supply