AIM: Study the relationship between a plant and a bacterium living in the soil.
METHOD:
- Identify a bacterium/some bacterial species that lives in the soil that could impact on plant growth.
- Grow some plants in soil/medium containing high levels of this bacterium, and some in soil containing low levels of it or (preferably) none. (Soil or agar?) Other variables will be kept constant or in some cases a range may be used to confirm that the bacterium has the same action across this variable.
- Note how long it takes plants to germinate (if growing from seed), their heights as they grow. Note anything such as flowering, leaf growth and take any measurements applicable. At the end of the project root length could also be measured and plant removed from soil/medium, washed and weighed.
We need to keep constant:
Soil type (ie. where it is sourced from, as well as what's in it) or other growth medium
Water
Light
Temperature
Plant type
Are these all of the factors we have to take into account or the variables that we could change for our science investigation?
ReplyDeleteWe could vary them, but we'd be trying to keep them constant OR simply test a slight variation in them to check that the results are constant across water concentration, light intesities etc.
ReplyDeleteOk, so we start with constant factors and if we get the time to develop on our investigation we could consider altering them... We also have to make sure that we pick a plant (or fungi?) that grows relatively quickly haha.
ReplyDeleteHey... It's Winter... Hm :-/
ReplyDelete