Foundation June 2019 Paper 3 Q18
18 Tom researches the weights of plant seeds.
- One poppy seed weighs \(3 \times 10^{-4}\) grams.
- 250 pumpkin seeds weigh 21 grams.
- One sesame seed weighs \(3.64 \times 10^{-6}\) kilograms.
Write the three types of seed in order according to the weight of one seed.
Write the lightest type of seed first.
You must show how you decide. [4]
| Answer | Marks | Part marks and guidance | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Poppy, Sesame, Pumpkin with correct comparable values shown | 4 | B3 for all 3 quantities seen correct in comparable form or B2 for \(8.4 \times 10^{-5}\) or \(8.4 \times 10^{-2}\) seen or seen correct in comparable form:
B1 poppy and sesame seen correct in comparable form or [pumpkin =] 0.084 or 0.000 084 seen or [250 poppy =] 0.000 075 oe seen or [250 sesame =] 0.000 91 oe seen | Condone weights as answer Quantities given in the question (bold in table) need not be rewritten Comparable forms include:
Must not be a mix of standard and ordinary form Accept consistent multiples for full marks. eg. 250 poppy = 0.075 and 250 sesame seeds = 0.91 May be all fractions with common denominator | ||||||||||||||||||||||||