Anatural hazard is always a natural disaster.

a. true
b. false

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design

No renewable resources are natural resources that are limited in supply and cannot be replaced as quickly as they are used.(true or false asnwering) a.true b.false

Refers to the biological heritage people use to identify themselves.