I need an introduction paragraph for a 7th grade science fair project (How well can people focus with different background noises?)
The experiment was tested by reading a book for 20 minutes.
During the trials the subjects read in silence (As the control), then with music with lyrics, and instrumental music (Music without lyrics).
If someone could help I would really appreciate it! :)

How water is moving through the ecosystem ?

What kinds of molecules can pass through the cell membrane without any problem?

An enzymatic hydrolysis of fructose-1-p, fructose-1-p(aq) + h2o(l) - fructose (aq) + pi (aq) was allowed to proceed to equilibrium at 25°c. the original concentration of fructose-1-p was 0.2 m, but when the system had reached equilibrium, the concentration of fructose-1-p was only 6.52 x 10^-5 m. calculate the equilibrium constant for this reaction and the free energy of hydrolysis of fructose-1-p.