Physical Geology Pretest 19-20

In an experiment, the part that is directly changed by the experimenter

• independent variable

• dependent variable

• constant

• hypothesis

One chicken is injected with a growth hormone while another chicken is not injected. Both chickens are weighed after a year.

What is the independent variable?

• weight

• type of chicken

• growth hormone

• time

In the scientific process, forming a hypothesis is often immediately followed by what step?

• publishing the results in a scientific journal

• conducting a peer review of the hypothesis

• testing the hypothesis by conducting an experiment

• drawing conclusions about the hypothesis

In an experiment, the group of subjects that do not have any variables changed is called the

• experimental group

• control group

• constant group

• normal group

Javier sleeps 9 hours before his science exam. His sister has the same exam and sleeps 6 hours before the test. Afterward, they compare their scores

What is the dependent variable?

• test score

• length of test

• amount of sleep

• temperature of testing room

A system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation

• theory

• law

• observation

• hypothesis

This type of rock is formed by cooling magma

• igneous

• sedimentary

• metamorphic

• foliated

This type of rock is formed when heat and pressure change the "parent" rock into something else

• igneous

• sedimentary

• metamorphic

• strata

Water evaporating out of sea water and leaving salt behind creates crystals of ________________ rock

• igneous

• sedimentary

• metamorphic

• intrusive

Which of the following would form an igneous rock, turn it into a metamorphic rock and then a sedimentary rock?

• heat and pressure -> melting and cooling -> erosion, deposition, cementation

• melting and cooling -> erosion, deposition, cementation -> heat and pressure

• erosion, deposition, cementation -> melting and cooling -> heat and pressure

• melting and cooling -> heat and pressure -> erosion, deposition, cementation