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Variables In An Experiment

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

ScienceWhile testing the effect of surface type on friction the force needed to pull an object is measured. What does this force represent?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student changes the number of batteries and observes bulb brightness. Recording brightness only as dim medium and bright is what type of measurement?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIf an experiment on the effect of fertilizer is conducted using only one plant what is the greatest limitation?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceFour plants receive (50,mL), (100,mL), (150,mL) and (200,mL) of water respectively. How many levels of the independent variable are present?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student investigates the effect of temperature on enzyme activity. What happens if a different amount of enzyme is used at each temperature?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhat is a factor called when it can affect the result but is neither deliberately changed nor controlled in an experiment?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWing length of a paper aeroplane is changed and flight distance is measured. Which factor is most appropriate to control?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment the rate of photosynthesis first increases and then becomes constant as light intensity rises. What should be placed on the horizontal axis of the graph?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile measuring the distance travelled by a toy car on different surfaces what type of variable is the surface type?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn comparing the cleaning ability of three soaps a different type of stain was placed on each cloth. Why would the result be unreliable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile investigating the effect of salt amount on the boiling point of water why is water without salt included?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student claims that music increases plant growth. Plants with music were kept near a window while plants without music were kept in a dark corner. What is the main confounding variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment the amount of water was changed and the number of leaves was measured. Which is the quantitative dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student measures the time period of pendulums of different lengths. What should be kept constant for a fair test?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIf the effect of acid concentration on the reaction rate with a metal is being tested which pair is correct?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student tests how fan speed affects the drying time of a wet cloth. What is the dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an experiment seed germination was measured at different temperatures but each group contained a different number of seeds. What problem will this cause?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhich factor is most important to keep controlled while testing the effect of water temperature on the rate of sugar dissolution?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile testing the effect of fertilizer amount on plant height what type of variable is plant height?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student investigates the effect of light duration on plant growth. The number of light hours received each day is changed. What is the independent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard