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.

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Tom researches the weights of plant seeds - OCR - GCSE Maths - Question 2 - 2019 - Paper 6

Question 2

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 \time... show full transcript

Worked Solution & Example Answer:Tom researches the weights of plant seeds - OCR - GCSE Maths - Question 2 - 2019 - Paper 6

Step 1

Weight of One Poppy Seed

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Answer

The weight of one poppy seed is given as:

$3 \times 10^{4} \text{ grams} = 30000 \text{ grams}$

Step 2

Weight of One Pumpkin Seed

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Answer

To find the weight of one pumpkin seed, we divide the total weight of 250 pumpkin seeds by 250:

$\frac{21 \text{ grams}}{250} = 0.084 \text{ grams}$

Step 3

Weight of One Sesame Seed

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Answer

The weight of one sesame seed is given as:

$3.64 \times 10^{6} \text{ kg} = 3640000 \text{ kg}$

To convert this to grams, we multiply by 1000:

$3640000 \text{ kg} = 3640000000 \text{ grams}$

Step 4

Comparing Weights

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Answer

We now compare the weights of the seeds:

Poppy seed: 30000 grams
Pumpkin seed: 0.084 grams
Sesame seed: 3640000000 grams

The lightest type of seed is the pumpkin seed. Therefore, the order from lightest to heaviest is:

Pumpkin Seed
Poppy Seed
Sesame Seed

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