a stapler is used to staple 100 papers; it jams 5 times during the trial. a different brand of stapler performs the same test; it jams 22 times.
1 or 2 type of stapler 1. independent variable
1 or 2 number of jams 2. dependent variable

the answer is false?

the correct answer is b

d. groundwater flows through the subsoil and deposits minerals.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.