Grade 9 Science QuizVersion en ligne Test key science methods and lab basics. par Andrea Arroyave Rincón 1 What is the scientific method? a A guess at results with no testing. b A memorized checklist for labs. c A set of random observations. d A systematic process used to investigate questions and test hypotheses. 2 Which variable is changed by the scientist? a Control variable b Dependent variable c Independent variable d Constant variable 3 What does CORMS stand for? a Control variables, Organism, Repeats, Measurements, Same conditions b Circuits, Optics, Rates, Mass, Study design c Control, Observations, Readings, Materials, Systems d Conditions, Organisms, Readouts, Measurements, Sample size 4 Why should experiments be repeated? a To increase reliability b To waste time c To confuse results d To change the hypothesis 5 What is a control variable? a The variable you change frequently b The variable you measure c A variable kept constant d The variable that defines the outcome 6 Why must only one variable be changed? a To make data collection faster b To ensure valid results c To reduce costs d To simplify the experiment 7 What is a pipette used for? a To heat substances b To measure accurate volumes of liquid c To grind chemicals d To read instrument scales 8 Why must safety glasses be worn in the lab? a To protect eyes from chemicals and heat b To comply with fashion rules c To look stylish d To prevent color changes in solutions 9 What is the endpoint of a titration? a When the burette is empty b At the first drop added c When the solution starts to boil d When indicator changes colour 10 What is titration used for? a To find concentration of a solution b To filter impurities c To mix two solutions d To measure temperature
