Sc 912 N 2 1

All of the following are steps in the scientific method except

• observing and recording data

• forming a hypothesis

• discarding data inconsistent with the hypothesis

• developing a model based on experimental results

Which of the following observations is quantitative?

• The liquid turns blue litmus paper red.

• The liquid boils at 100 degrees C

• The liquid taste bitter.

• The liquid is cloudy.

Which of the following observations is qualitative?

• A chemical reaction was complete in 2.3 seconds.

• The solid had a mass 23.4 grams.

• The pH of a liquid was 5.

• Salt crystals formed as the liquid evaporated.

A statement that can be tested experimentally is a

• variable

• model

• generalization

• hypothesis

Tags

NGSS.HS-PS1-2

A theory is best described as a

• series of experimental observations.

• generalization that explains a body of known facts or phenomena.

• scientifically proven fact.

• testable statement.

A plausible explanation of a body of observed natural phenomena is a scientific

• control

• experiment

• law

• theory

Quantitative observations are recorded in the form of

• numerical data

• detailed descriptions

• precise predictions

• step-by-step procedures

Tags

NGSS.HS-LS2-2

Which of these statements about the scientific method is not true?

• All experiments must follow the same step-by-step procedure.

• Experiments may be repeated several times.

• Some unexpected results can be beneficial.

• Experimental results may or may not support the hypothesis.

Tags

NGSS.HS-LS1-3

NGSS.HS-PS1-3

NGSS.HS-PS2-5

Ten plants are grown in equal amounts of sunlight with equal amounts of water and varying amounts of fertilizer. Sunlight, water, and fertilizer are

• controls

• experiments

• systems

• variables

An experiment was designed to measure the effect of sulfur dioxide emissions from a power plant of the pH of rain falling downwind of the plant. In this experiment, the average pH of rainwater upwind from the plant would be considered

• a model

• a variable

• the hypothesis

• the control