Week 1 Discussion — Alive or Not, and How Would You Know? — Traditional alternative (no AI)
Instructors: publish this instead of the adaptive version if you prefer, and unpublish or delete the adaptive one.
Hook
A seed can sit in a paper packet for a long time looking like a small brown pebble, then sprout into a plant when you water it. This week you learned that life is the whole checklist of seven characteristics, not one box, and that biologists settle a claim with a fair test, not a confident guess.
Your discussion question — choose Option A or Option B; they carry the same weight and the same rubric, and you say which you picked.
Option A: Pick one borderline case and argue whether it is alive: a seed in a packet, a virus, a forest fire, a robot that could build copies of itself, or another case you choose. Run all seven characteristics of life on it, one at a time. Which characteristic is hardest to judge for your case, and what observation would change your mind?
Option B: Pick an everyday claim you have heard (music makes houseplants grow faster, a cold shower wakes you up more than coffee, a pet eats more from a new bowl, or one of your own). Design a controlled experiment to test it: write a falsifiable hypothesis, and name the independent variable, the dependent variable, the control group, and one confound you would design out. Could one experiment settle the claim? Argue why or why not.
There is no single right answer here. Borderline cases are hard on purpose, and two careful people can design two different fair tests of the same claim. Pick a case or a claim you actually care about, and walk us through your thinking.
Expectations
Activity format: one initial post followed by two substantive peer replies. Plan on about 45 minutes across the two deadlines; your instructor sets both due dates in Canvas.
Your initial post — by the first due date (early in the module week):
- Say which option you chose.
- For Option A, name your case, run all seven characteristics of life on it one at a time, and give your judgment; for Option B, write a falsifiable hypothesis and name the independent variable, the dependent variable, the control group, and one confound.
- Use at least two of this week's terms (characteristics of life, homeostasis, cell, hypothesis, falsifiable, independent variable, dependent variable, control group, confound, theory) correctly.
- Say what observation or result would change your mind.
- Length: roughly 150–250 words if written. You may instead record your post as audio or video (about two minutes) and attach a transcript; both forms are scored by the same rubric.
Your replies — by the second due date (the end of the module week):
- Reply substantively to at least two classmates.
- A substantive reply does more than agree: name a characteristic of life the poster skipped, point out a confound their design leaves open, or suggest a result that would count against their hypothesis. "Nice point!" on its own does not count.
What a strong post looks like:
I chose Option B. My claim: music makes houseplants grow faster. My hypothesis: if a houseplant hears music for an hour a day, then it will grow taller in a month than an identical plant kept in silence, because the vibration might affect growth. The independent variable is music or no music; the dependent variable is the height gained in a month; the control group is the plant in silence. One confound I would design out is light, so both plants sit at the same window. If the two plants grew the same amount, that would count against my hypothesis. One test with two plants could support the claim, but it could not prove it.
Notice how it states a falsifiable hypothesis, names every part of the experiment, spots a confound, and uses supports rather than proves. That is the bar.
Participation rubric
This discussion is worth 10 points. The three criteria below look at your initial post and your peer replies.
| Criterion | Full credit | Partial credit | No credit |
|---|---|---|---|
| Quality of the initial post (4 pts) | A specific case run through all seven characteristics with a supported judgment, or a complete fair test with a falsifiable hypothesis and a result that would count against it | A case or test is present, but some characteristics or parts are skipped, or the judgment is asserted without a reason | Missing, off-topic, or no reasoning about the case or claim |
| Use of course concepts (3 pts) | Uses the characteristics of life, or the independent variable, dependent variable, control group, and confound, precisely, with supports rather than proves | Uses a term loosely, or swaps two terms such as the independent and dependent variables | No course terms, or used incorrectly |
| Engagement with peers (3 pts) | Two or more substantive replies that extend or challenge a classmate's reasoning | One substantive reply, or replies that only agree | No replies, or "I agree" with nothing added |
Post early if you can — the best threads happen when people have time to reply before the second due date.
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