MTTC Integrated Science (Secondary) Exam Questions With 100% Correct Answers

MTTC Integrated Science (Secondary) Exam Questions With 100% Correct Answers Graticule slide - answermarked with grid line, useful for counting or estimating a quantity Preparing acid solutions - answerAlways add acid to 2/3 water, then add rest of water # of Animal species - answerover 1 million species and about 30 divisions # of insects - answer800,000 species, half of animal kingdom Characteristics of animal kingdom - answermuliticellular, 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 - answermethod of getting energy by eating food that has energy releasing substances Mendel - answerFather of genetics, experimented with pea plants to observe inherited traits McClintock - answerCreated the first genetic map for maize, demonstrated recombination, how transposition flips the switch for traits. Watson and Crick - answerDiscovered the structure of DNA double helix and helped explain how DNA replicates. Leeuwenhoek - answerFirst to observe single celled organisms with homemade magnifying glass. Observed bacteria, yeast, plants and other microscopic organisms. Linnaeus - answerCreated a method of classifying plants and animals, a way to organize and study large amounts of data, called Linnaean taxonomy. Darwin - answernatural selection, survival of the fittest by observing finches. Also discovered fossils, noted stratification, dissected marine animals and interacted with indigenous peoples. Scientific fact - answeran objective and verifiable observation Scientific theory - answergreater body of accepted knowledge, principles, relationships that might explain a fact. Hypothesis - answerEducated guess that is not yet proven. Used to predict the outcome of an experiment Law - answerAn explanation of events that always leads to the same outcome. Model - answerUsed to explain something on a smaller scale or in simpler terms. Scientific Method - answerIdentify a problem Formulate a hypothesis Conduct experiments Observe results Draw conclusions Peer review Random errors in data - answerSometimes called noise, wildly different from the rest of the data. Does not affect average Systematic errors in data - answerShows up consistently across a data set, may be the result of a flaw in experimental design. Affects average, also known as bias. Mean - answerAverage Median - answerMiddle number Mode - answerValue that appears most frequently Range - answerDifference between highest and lowest numbers Standard Deviation - answerHow far from the mean is from a single data likely to be, measures dispersion of data set Ampere (A) - answerSI unit used to measure electric current Kelvin (K) - answerSI unit used to measure thermodynamic temperature Candela (cd) - answerSI unit used to measure luminous intensity National Science Education Standards - answerUnderstand scientific concepts Appreciate "how we know" what we know in science Understand the nature of science Develop the skills necessary to become independent inquirers about the natural world Develop the skills necessary to use the skills, abilities, and attitudes associated with science Regression analysis - answerMethod of analyzing sets of data and sets of variables that involve studying how the typical value of the dependent variable changes when one independent variable changes and the other remains the same. Protosomic phyla - answerMouths are formed from the blastospore. Ex: Mollusca, Annelida, Arthropods Animal phyla that lack a coelom or have a psedocoelom - answerPorifera, Cnidaria, Platyhelminthes, Nematoda # of invertebrates in animal kingdom - answer98% of animal species, 30 phyla Phylum Chordata - answerVertebrates, two cavities - thoracic holds heart and lungs, abdominal holds digestive organs. All have endoskeletons Deuterostomic phyla - answerAnuses are formed from blastopores, Echinodermata and Chordata Epithelial tissue - answerFound on body surfaces and lining body cavities, ex: skin and stomach lining. Functions are protections, secretion of chemicals, absorption of chemicals, response to external stimuli. Contain no blood vessels so must receive nourishment from underlying tissue Connective tissue - answerUsed to bind, support, protect, store fat, and fill space. Can be loose or fibrous, ex: cartilage, bone, tendons, ligaments, blood, and protective layers. 3 types of muscle tissues - answerCardiac, smooth and skeletal (striated) 11 Organ systems of the body - answerSkeletal Muscular Nervous Digestive Respiratory Circulatory Skin Excretory Immune Endocrine Reproductive Nerve cells - answerTransmit nerve im