Excretion, response to stimuli and the organism as a whole
Answers are for parents and teachers.
1
Repeat the “reaction time” test at home with a friend: find the average distance of 5 tries.
Depends on your measurements: add the 5 distances and divide by 5.
2
Draw the human excretory system and label its organs.
Kidneys, ureters, bladder and urethra should be labelled.
3
Watch your houseplant’s phototropism for 7 days and write the bending direction each day.
The shoot bends towards the window, i.e. towards the light.
4
Write 4–5 sentences on which organs work one after another after you eat.
The digestive tract breaks food down; nutrients are absorbed into blood in the small intestine; blood carries them to cells; the rest leaves through the large intestine, and water and harmful substances leave via the kidneys.