Suppose that you can reproduce a short-time physical or chemical event over and over again.
Discuss possible sources of errors associated with measuring the duration of the event using a
stopwatch. (\"Human error\" is not a source.) What effect do the sources of error have on the
data?
Solution
There can be various ways by which measurement of time using stopwatch may vary and how it
will affect the error.
1.there might be internal errors in the watch, which might delay or extend reading (technical
error). It may slow down the time or increase it and accordingly vary the data.
2. There might be error due to relativity, if object is moving at high speed. Again it may increase
or decrease the value depending on the condition..
The idea that some invasive grass species are ecosystem engineers, an.pdf
1. The idea that some invasive grass species are ecosystem engineers, and successfully compete
with native grasses has to do with: A. Accessing resources before other competing species B.
Having a large seed bank to increase chances of overall germination C. Changing their
environment to give them an advantage D. Seeds staying dormant for a longer period
Solution
question 2.
the idea that some invasive grass species are ecosystem engineers , and successfully compete
with native grasses has to do with:
A. Accessing resources before other competing species. ( answer)
as per example , say like an invasive species may able to use resources that are previously
unavailable to native species so it can access the resources when it comes in uninhabitated soil
types. we can say it as non native species.
