Biological detergents contain protease enzymes. Figure 4 shows some apparatus and materials.
Describe how you would use the apparatus and materials shown in Figure 4 to find the
best temperature for removing stains from clothing.
You should include how you would make the investigation a fair test.

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.