Mttc Integrated Science Secondary Practice Questions and Answers 100% Pass
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Course
Mttc
Institution
Mttc
Mttc Integrated Science Secondary
Practice Questions and Answers 100%
Pass
What are the 5 steps in the Scientific Method? - CORRECT ANSWER-1. Identify a
problem or pose a question based on an observation.
2. Formulate a hypotheses.
3. Conduct experiments or tests the hypotheses.
4. Observ...
Mttc Integrated Science Secondary Practice Questions and Answers 100% Pass What are the 5 steps in the Scientific Method? - CORRECT ANSWER -1. Identify a problem or pose a question based on an observation. 2. Formulate a hypotheses. 3. Conduct experiments or tests the hypotheses. 4. Observe and record the results. 5. Draw a conclusion (was the hypothesis correct?). * peer review is also important. Metric Unit deca (da): - CORRECT ANSWER -x 10^1 Metric Unit hecto (h): - CORRECT ANSWER -x 10^2 Metric Unit kilo (k): - CORRECT ANSWER -x 10^3 Metric Unit mega (M): - CORRECT ANSWER -x 10^6 Metric Unit giga (G): - CORRECT ANSWER -x 10^9 Metric Unit deci (d): - CORRECT ANSWER -x 10^ -1 Metric Unit centi (c): - CORRECT ANSWER -x 10^ -2 Metric Unit milli (m): - CORRECT ANSWER -x 10^ -3 Metric Unit micro (µ): - CORRECT ANSWER -x 10^ -6 Metric Unit nano (n): - CORRECT ANSWER -x 10^ -9 Metric Unit pico (p) - CORRECT ANSWER -x 10^ -12 What is an Independent Variable and what axis is it plotted on in a graph? - CORRECT ANSWER -*The variable that acts as a control or does not change during an experiment. *x axis What is an Dependent Variable and what axis is it plotted on in a graph? - CORRECT ANSWER -*The variable that changes in response to the independent variable. This change is measured to determine the effect of the independent variable on the dependent variable. *y axis What are random experimental errors? - CORRECT ANSWER -Errors that are not consistent across the data set. * can result in collected data that does not seem to fit and may be wildly different from the rest of the data, or they may result in data that is indistinguishable from the rest. * may be the result of outside factors that are not considered variables *referred to as noise What are systematic experimental errors? - CORRECT ANSWER -An error that will show up consistently across a sample or data set. *may be the result of a flaw in the experiment design or instrumentation *affects the average *known as a bias Chemistry lab fire hazards - CORRECT ANSWER -Volatile solvents: ether, acetone, benzene *store in open beaker or Erlenmeyer flask *use extreme caution around sparks * heat in fume hood with a steam bath (not on a hot plate) Chemistry lab chemical burns - CORRECT ANSWER -Mineral acids and alkalis are corrosive to the skin and eyes *acid halides and phenols are corrosive and often toxic Chemistry lab toxic chemicals that can be absorbed through the skin - CORRECT ANSWER -dimethyl sulfoxide (DMSO) nitrobenzene Chemistry lab toxic fume inhalation - CORRECT ANSWER -acetyl chloride - severely irritate membranes in the eyes, nose, throat, and lungs benzyl chloride - eye irritation and tears Simple microscope - CORRECT ANSWER -a microscope that contains only one lens Compound microscope - CORRECT ANSWER -Microscope that contains two or more lenses to increase total magnification (usually 3 lenses) *multiply each magnification to obtain total magnification Accuracy of balances - CORRECT ANSWER -Most accurate - Electronic triple - beam Least - Spring balance Chromotography - CORRECT ANSWER -Is the separation of a mobile phase carrying a mixture that moves in contact with a selectively absorbent stationary phase. Analyte - CORRECT ANSWER -The substance or chemical being analyzed or detected in a specimen reagent - CORRECT ANSWER -a chemical agent for use in chemical reactions centrifuge - CORRECT ANSWER -an apparatus that uses centrifugal force to separate particles from a suspension Heterogeneous mixture - CORRECT ANSWER -A mixture in which different materials can be distinguished easily precipitate - CORRECT ANSWER -A solid that forms and settles out of a liquid mixture supernatant - CORRECT ANSWER -liquid above the precipitate that remains after centrifugation that can be removed from the precipitate with a pipet - also called centrifugate Spectrophotometry - CORRECT ANSWER -An analytical method for identifying a substance by its selective absorption of different wavelengths of light. Electrophoresis - CORRECT ANSWER -A technique for separating macromolecules (proteins, RNA, DNA) on a gel using an electric field. Calorimetry - CORRECT ANSWER -The measurement of heat flow (into or out of a system) as the result of a chemical reaction or physical process. Titration - CORRECT ANSWER -a measured amount of a solution of unknown concentration is added to a known volume of a second solution until the reaction between them is just complete Charles Robert Darwin - CORRECT ANSWER -Author of "On the Origin of Species" and founder of modern evolution theory. Natural Selection, natural change, gradual change, and common descent *d.1882 Anton van Leeuwnhoek - CORRECT ANSWER -made his own lenses found unicellular organisms cell theory (all cells come from preexisting cells) *d. 1723 Carl Linnaeus - CORRECT ANSWER -"Father of Taxonomy"; established his classification of living things; famous for animal naming system of binomial nomenclature *d. 1778 Barbara McClintock - CORRECT ANSWER -Nobel Prize winner who found that genes could jump from one place on chromosome to another Created the first genetic map for maize *d. 1992 Gregor Johann Mendel - CORRECT ANSWER -Austrian monk, and botanist who proved the existence of dominant and recessive characteristics in living things (pea plants). "Father of Genetics" *d. 1884 James Watson and Francis Crick - CORRECT ANSWER -Co-discovered the double helix structure of DNA in which two strands were wound around each other --led to discovery of how DNA is replicated. *d. 2004 Mean - CORRECT ANSWER -Average (sum of a list of numbers divided by the number of numbers) Median - CORRECT ANSWER -Middle Number Mode - CORRECT ANSWER -Most common Range - CORRECT ANSWER -Distance between highest and lowest scores in a set of data. Regression analysis - CORRECT ANSWER -Measures the impact of a set of variables on another variable Standard deviation - CORRECT ANSWER -A statistical measure of how far away each value is, on average, from the mean. *determines the confidence one can have in their conclusions eukaryotic cell - CORRECT ANSWER -A type of cell with a membrane -enclosed nucleus and membrane -enclosed organelles. Examples of organisms with these cells are protists, plants, fungi, and animals. Prokaryotic Cell - CORRECT ANSWER -A type of cell lacking a membrane -enclosed nucleus and membrane -enclosed organelles; found only in the domains Bacteria and Archaea. Nuclear parts of a cell - CORRECT ANSWER -Nucleus, Chromosomes, Chromatin, Ribosomes, Nucleolus, Nuclear envelope, Nuclear Pores, and Nucleoplasm
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