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Class 9 · Science
→Why should the number of seeds be the same in each group of a germination experiment?
Class 9 · Science
→A student measures germination percentage at different temperatures. What are temperature and germination percentage respectively?
Class 9 · Science
→What difficulty arises if plants have different initial heights in a fertilizer experiment?
Class 9 · Science
→A student gives different amounts of fertilizer and counts the number of leaves. What type of variable is the number of leaves?
Class 9 · Science
→What is the main reason for keeping the initial push the same in a toy-car experiment?
Class 9 · Science
→A student investigates how surface type affects the distance travelled by a toy car. Which is the independent variable?
Class 9 · Science
→Which is the most suitable controlled variable in an experiment on lamp distance and light intensity?
Class 9 · Science
→A student places a lamp at different distances and measures light intensity. What are lamp distance and light intensity respectively?
Class 9 · Science
→Which result could be the dependent variable in a hot-water cooling experiment?
Class 9 · Science
→A student measures the cooling time of hot water using cloths of different thicknesses. What type of variable is cloth thickness?
Class 9 · Science
→Why should the initial amount of water be kept the same in the salt and boiling point experiment?
Class 9 · Science
→A student investigates how the amount of salt affects the boiling point of water. Which is the dependent variable?
Class 9 · Science
→Which variable should be kept the same to make a ball bounce experiment fair?
Class 9 · Science
→A student drops a ball from different heights and measures bounce height. Which is the correct pair of independent and dependent variables?
Class 9 · Science
→A student measures sugar dissolving time at different temperatures. What problem occurs if the amount of sugar differs in each trial?
Class 9 · Science
→Which factor is most important to control in an experiment on the effect of light on a plant?
Class 9 · Science
→In an experiment on light duration and plant growth what would be the most suitable dependent variable?
Class 9 · Science
→A student investigates how the duration of light affects plant growth. Which is the independent variable?
Class 9 · Science
→What is the main reason for keeping controlled variables the same in a fair experiment?
Class 9 · Science
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