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Exploration Entering The World Of Secondary Science

Class 9 Science के इस tag से जुड़े questions। हर question के साथ chapter, topic, level और difficulty दी गई है।

ScienceIf the dependent variable first increases and then decreases as the independent variable rises what is the risk of taking only the first two values?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student wants to measure cooling time under different room temperatures. What happens if the initial water temperature differs in every trial?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment the result is recorded as good average or poor. What is the main limitation of this dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceThe amount of sugar is increased in intervals of (1,\text{g}) and dissolving time is measured. What type of variable is the amount of sugar?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment plants receive red blue and green light and biomass is measured after seven days. What type of independent variable is light color?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn which situation should age be a controlled variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student applies the values of the independent variable in a random order. What is the main advantage?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceTo investigate the effect of surface area on evaporation rate which dependent variable is most clearly defined?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceAn experiment tests the effect of water depth on pressure. Liquids of different densities are used at different depths. What difficulty does this create?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIf the question is whether wire length affects its resistance which is the appropriate variable pair?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard SciencePlants are grown in four soil types but each soil receives a different amount of water. What should be done to isolate the effect of soil type?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student investigates how ramp angle affects the speed of a toy car. The car is released from a different starting point in each trial. Which conclusion is appropriate?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn the same experiment liquid volume is measured using different measuring cylinders with different precision. This problem is related to which variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceTo test the effect of acid concentration on reaction time which variable is most essential to keep the same?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment the number of batteries is changed and bulb brightness is rated on a scale from one to five. Which statement is correct?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student claims that plant species is the dependent variable because the plant is observed at the end. Why is this claim incorrect?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIf only two very close values of the independent variable are used in an experiment what is the main difficulty?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment temperature is continuously measured but not deliberately changed. If temperature can affect the result what type of variable is it?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile testing the effect of salt concentration on the mass of potato pieces the initial masses differ. What is the best improvement?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student tests the effect of soap amount on foam height. The bottle is shaken a different number of times in each trial. What should be done with the number of shakes?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard