Praxis Science Review

What process is used to discover the truth confirming or rejecting hypothesis, thoughts, and ideas?

• Skepticism

• Tolerance of uncertainty

• Scientific method

• Testing of hypothesis

Tags

NGSS.HS-LS3-2

NGSS.HS-PS2-5

NGSS.HS-PS3-4

At what point does the acceptance or rejection of the hypothesis occur?

• Problem statement

• Testing of the hypothesis

• Data collection

• Conclusion

Tags

NGSS.HS-LS3-2

A pesticide was applied to a field as an experiment to determine the level of dosage needed to kill boll weevils. An unexpected rainstorm occured during the application of some, but not all, of the pesticide. this poorly timed weather event would be known as a(n)

• control

• uncontrolled variable

• independent variable

• dependent variable

what year was the HeLa, or the first cancer cell line, propagated?

• 1941

• 1951

• 1961

• 1971

Who is credited with the discovery of Lucy, the skeletal remains of an extinct, perhaps the oldest, hominid species, Australopithecus afarensis.

• Donald Johanson and team

• Ted Hoff

• Robert Metcalfe

• Steve Wozniac

Which is not one of the five common chemical hazards in the science laboratory?

• Flammables

• Corrosives

• Oxidizers/reactives

• Salts

What types of materials are not "communicable" hazards and may consist of biological samples free of parasites and contagious pathogens as well as household substances?

• Non Infection biological materials

• Infectious biological materials

• Nonindigenous species

• Indigenous species

Which glassware should be used for measuring volume?

• Borosilicate

• Pipettes

• Vials

• Watch glasses

What is the SI base unit for mass?

• Liter

• Meter

• Second

• Kilogram

How many significant digits are found in 0.0009721?

• 1

• 8

• 9

• 4