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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।

ScienceIn an experiment, the increase in spring length caused by different loads is measured. If a different spring is used in every trial, which variable has not been controlled?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student investigates how fan speed affects the drying time of wet cloth. If the initial water mass in the cloth pieces differs, what is the most appropriate action?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIn an ideal fair experiment, which relationship among independent, dependent and controlled variables is correct?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student tests the cleaning ability of three soaps, but the initial stain size differs on each cloth. Which would be the fairest dependent variable?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIf the independent-variable values are correct but the dependent variable is measured by a different method each time, which quality is most affected?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student calls room temperature the independent variable but does not change it or set it at different levels during the experiment. What is the best correction?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIn which situation would a control group be most useful?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentEasy ScienceA student drops a ball from four different heights and measures its bounce height. If a different type of ball is used each time, what is the most appropriate improvement?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIn an experiment, a student records the distance that a falling ruler travels before being caught in order to estimate reaction time. What is this distance?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceWhich option lists the independent, dependent, and controlled variables in the correct order when testing the effect of fertilizer amount on plant dry mass?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceA student investigates whether music type affects reading speed. The sound intensity differs between music types. What should be done for a fair test?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceIn an investigation salt concentration is the independent variable. Which option is the best set of its levels?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceIf a controlled variable cannot be kept perfectly constant what is the best scientific step?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student tests the effect of temperature on bacterial growth but allows different temperature groups to grow for different durations. What type of variable has incubation time become?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceThree measurements are taken at each value of the independent variable. What is the main benefit?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentMedium ScienceOne student records plant height by eye as short or tall. Another measures it in centimeters with a ruler. Why is the second student's dependent variable better?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile testing the effect of water amount on plant growth one plant is kept near a window and another in a dark corner. What is the light condition?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceTwo students use the same independent variable but one records time in seconds and the other in minutes. What is necessary before comparison?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceWhile measuring the period of pendulums of different lengths the mass of the bob is kept constant. What is the purpose of keeping mass constant?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard ScienceA student says that the variable placed on the horizontal axis is always the independent variable. What is the most accurate evaluation?Class 9Exploration: Entering the World of Secondary ScienceVariables in an experimentHard