Question 1

What is Decay Time?

Accepted Answer

A quick estimation game: see an everyday item · a banana peel, a tin can, a plastic bottle · and pick how long it takes to break down in nature. One wrong answer ends the streak, and your best score is saved locally in your browser.

Question 2

Where do the decomposition times come from?

Accepted Answer

From the widely-cited environmental-education tables, principally NOAA marine-debris material. Real decomposition depends on moisture, temperature and burial, so the game uses coarse, defensible magnitudes · the skill being trained is magnitude sense, not memorising lab data.

Question 3

Can I study just one category?

Accepted Answer

Yes. The picker on the start screen filters the pool to nature & food items, human-made materials, or everything. Each category keeps its own best streak.

Question 4

How does it get harder?

Accepted Answer

Two ways: as your streak grows the wrong answers move closer to the true duration (450 vs 600 years instead of 1 month vs 1 million years), and an extra answer option joins the row.

Question 5

Can I print it as a worksheet?

Accepted Answer

Yes. Decay Time supports the printable worksheet generator at /worksheets · each problem prints with lettered duration choices and an answer key, a ready-made handout for environment and recycling units.