Scientific Investigation Review

The scientific method is a systematic procedure for scientific investigation. It generally involves observation of phenomena, formulation of a hypothesis, experimentation to test the hypothesis, and

• using a computer to solve the problem.

• coming to a conclusion that validates or modifies the hypothesis.

• writing a paper on the investigation.

• formulating a scientific law.

Elin is conducting a scientific investigation in which she measures a certain type of plant's growth in response to different amounts of fertilizer. What is the independent variable?

• plant growth

• type of plant

• amount of fertilizer

• temperature of fertilizer

Elin is conducting a scientific investigation in which she measures a certain type of plant's growth in response to different amounts of fertilizer. What is the dependent variable?

• amount of fertilizer

• temperature of fertilizer

• plant growth

• type of plant

Choose all the safety tools that should not be used in an experiment.

• goggles

• gloves

• apron

• napkins

When enough experimental data is collected to support a hypothesis, the hypothesis becomes a —

• theory

• fact

• question

• law

What is the independent variable in the following hypothesis?

HYPOTHESIS: If I spend more time studying, then my grades in science will improve.

• time spent studying

• playing soft music in the background

• improvement of grades

• location for studying science

What is the dependent variable in the following hypothesis?

HYPOTHESIS: If I add fertilizer to my flowers, then the flowers will grow taller.

• height of the flowers

• the amount of time the flowers bloom

• the number of blooms on each fertilizer

• the amount of fertilizer added

To test the hypothesis below, what would be used as the control group?

Hypothesis: I can run faster when I wear Nike running shoes.

• the number of times each brand was tested

• the Nike shoes

• all other brands of shoes tested

• how fast I can run (speed)

What is a constant?

• Something that changes the data in the experiment

• Something that is kept the same in an experiment

• Something that is manipulated in an experiment

The graph shows the amount of money each homeroom class earned for the 4th-grade fundraiser.

Based on information in the graph, which statement is true?

• Mr. Henry’s class earned less than any other class.

• Ms. Jones’ class earned the most of the four classes.

• Ms. Davis’ class earned more than twice what Ms. Jones’ class earned.

• Ms. Smith’s class earned more than twice what Ms. Davis’ class earned.