MTTC Integrated Science (Secondary) Questions with 100% Correct Answers | verified

Graticule slide - Answer marked with grid line, useful for counting or estimating a quantity Preparing acid solutions - Answer Always add acid to 2/3 water, then add rest of water # of Animal species - Answer over 1 million species and about 30 divisions # of insects - Answer 800,000 species, half of animal kingdom Characteristics of animal kingdom - Answer muliticellular, heterotrophic, reproduce sexually, do not have cell walls or chloroplasts, can move at some stage of life, can rapidly respond to environment due to specialized tissues like nerve and muscle Heterotrophic - Answer method of getting energy by eating food that has energy releasing substances Mendel - Answer Father of genetics, experimented with pea plants to observe inherited traits McClintock - Answer Created the first genetic map for maize, demonstrated recombination, how transposition flips the switch for traits. Watson and Crick - Answer Discovered the structure of DNA double helix and helped explain how DNA replicates. Leeuwenhoek - Answer First to observe single celled organisms with homemade magnifying glass. Observed bacteria, yeast, plants and other microscopic organisms. Linnaeus - Answer Created a method of classifying plants and animals, a way to organize and study large amounts of data, called Linnaean taxonomy. Darwin - Answer natural selection, survival of the fittest by observing finches. Also discovered fossils, noted stratification, dissected marine animals and interacted with indigenous peoples.Scientific fact - Answer an objective and verifiable observation Scientific theory - Answer greater body of accepted knowledge, principles, relationships that might explain a fact. Hypothesis - Answer Educated guess that is not yet proven. Used to predict the outcome of an experiment Law - Answer An explanation of events that always leads to the same outcome. Model - Answer Used to explain something on a smaller scale or in simpler terms. Scientific Method - Answer Identify a problem Formulate a hypothesis Conduct experiments Observe results Draw conclusions Peer review Random errors in data - Answer Sometimes called noise, wildly different from the rest of the data. Does not affect average Systematic errors in data - Answer Shows up consistently across a data set, may be the result of a flaw in experimental design. Affects average, also known as bias. Mean - Answer Average Median - Answer Middle number Mode - Answer Value that appears most frequently Range - Answer Difference between highest and lowest numbersStandard Deviation - Answer How far from the mean is from a single data likely to be, measures dispersion of data set