Q1.
Soak some seeds of whole moong or black or white chana overnight. Next morning, take them out and wrap them in a moist cloth to sprout them. Over the next 4 days, take out one seed each day and measure the length of sprout. Fill the table: Day 1, Day 2, Day 3, Day 4 — Length of the sprout (in mm).
The table as printed on page 62 — write your own measurement in each row.
| Number of days | Length of the sprout (in mm) |
|---|---|
| Day 1 | |
| Day 2 | |
| Day 3 | |
| Day 4 |
Answer
Do the activity for four days and write your own numbers in the table. Here is exactly how, and a sample table.
- Soak a handful of whole moong overnight in a bowl of water.
- Next morning drain the water. Wrap the seeds in a wet cloth. Keep the cloth damp — sprinkle water if it dries.
- Each day take out one seed. Do not disturb the rest.
- Lay the seed on paper. Mark where the sprout starts and where it ends with a pencil.
- Measure between the two marks with your ruler and read it in millimetres. A sprout is small, so millimetres are the right unit.
- If the sprout is curly, lay a thread along it, then straighten the thread on the ruler.
Sample answer:
| Number of days | Length of the sprout (in mm) | Growth since the day before |
|---|---|---|
| Day 1 | 3 mm | — |
| Day 2 | 8 mm | 5 mm |
| Day 3 | 15 mm (1 cm 5 mm) | 7 mm |
| Day 4 | 24 mm (2 cm 4 mm) | 9 mm |
What to notice: The sprout grows a little more each day, not the same amount every day. On Day 1 it grew 3 mm; by Day 4 it added 9 mm in one day. Your own seed may grow faster or slower — warmth and moisture change everything.
Try this: Grow two seeds — keep one in a warm dark place and one on a cold windowsill. Measure both for four days. Which one grows longer? Write your finding in one sentence.