Science Basics and Measurements

Define accuracy in scientific measurements.

• The degree to which a measured value agrees with the true value.

• The consistency of repeated measurements.

• The range of values within which a measurement falls.

• The average of all measured values.

Define precision in scientific measurements.

• The accuracy of a single measurement.

• The closeness of two or more measurements to each other.

• The range of values in a set of measurements.

• The average of all measurements taken.

What are some ways that conclusions can be expressed?

• They can be written out or represented using a table, chart, or graph.

• They can only be written out in paragraphs.

• They can be expressed only through verbal communication.

• They can be summarized in a single sentence.

centi- (c).

• 10^1

• 10^2

• 10^3

• 10^4

What is the SI unit for length?

• Kilometer (km)

• Meter (m)

• Centimeter (cm)

• Millimeter (mm)

Giga- (G).

• 10^6

• 10^8

• 10^9

• 10^12

pico- (p).

• 10^6

• 10^9

• 10^12

• 10^15

What are scientific theories?

• Well-established and highly reliable explanations of scientific phenomena that are capable of being tested by multiple independent researchers.

• Unproven ideas that scientists are still debating.

• Simple guesses about how things work in nature.

• Personal beliefs that cannot be tested scientifically.

What is the SI unit for mass?

• Gram (g)

• Pound (lb)

• Kilogram (kg)

• Ounce (oz)

What are hypotheses in science?

• Tentative and testable statements that must be capable of being supported or not supported by observational evidence.

• Unproven theories that cannot be tested or observed.

• Final conclusions drawn from experimental data.

• Random guesses made without any basis in research.