The later weighed each leaf at the start and hung them on the line Ho weighed them again after 24 hours When water is lo

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The Later Weighed Each Leaf At The Start And Hung Them On The Line Ho Weighed Them Again After 24 Hours When Water Is Lo 1 (43.22 KiB) Viewed 101 times

The later weighed each leaf at the start and hung them on the line Ho weighed them again after 24 hours When water is lost from a leaf the mass of the leaf decreases. The table shows the percentage decrease in mass of the three leaves after 24 hours Surface covered with vaseline Massa after 24 at start hours Porcentage decrease In mass Neither 1.9 1.3 32 11 2 Lower 1.6 1.8 3 Upper 2.0 1.6 2.1 Use the equation to calculate the percentage decrease in mass of leaf 3. Show all your working. (3) 2.2 The percentage decrease in mass is used to compare the results. Explain why. (2) 2.3 The leamer did not put vaseline on either surface of leaf 1. What was the purpose of of leaf 1? (1) 2.4 The leamer covered the lower surface of leaf 2 with vaseline, Suggest why leaf 2 had the smallest percentage decreae in mass. (2) (8)