Laboratory safety and the signs of life
Answers are for parents and teachers.
1
Write six laboratory safety rules in your own words in your notebook.
Free answer; for example: teacher supervision, whole glassware, only the teacher heats things, no tasting, keep order, wash hands with soap.
2
Observe a cat, dog or plant at home and write how at least five of the eight characteristics show up in it.
Free answer; each characteristic must be backed by an observed example.
3
Make a two-column table comparing autotrophic and heterotrophic nutrition.
Autotroph: makes its own food (green plant); heterotroph: feeds on ready-made food (animal, fungus).
4
Why is a stone not alive? Using the eight characteristics, write 2–3 sentences.
A stone does not feed, breathe, reproduce, grow or respond to stimuli.
5
Make your own sentence with each of the words metabolism, irritability and excretion.
Free answer; the words must be used with the correct meaning.