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Burning and Oxygen
 * A* || 12 ||
 * A || 10~11 ||
 * B || 8~9 ||
 * C || 6~7 ||
 * D || 5 ||

1. Have you had a title underlined 1. Have you shown an aim 1. Have you used a pencil and a ruler for the diagram 1. Have you used at least 7 lines for the diagram 1. Have you said the total volume of the jar or volume used 1. Have you shown the formula to calculate the % gas used 1. Have you shown the calculation in your work 1. Have you done the experiments 3 times and taken the average 1. Have you had your average shown between 18 and 20 percent 1. Have you explain the reason the water rise relating to oxygen in your conclusion 1. If you have said it is not very accurate because we use our finger 1. If you have explained it is accurate enough because