Scientific Method Review

Ultimately, all scientific knowledge comes from:

• experimentation

• observation

• textbooks

• both experimentation & observation

Tags

NGSS.HS-PS1-3

A hypothesis must be:

• proven correct

• testable

• observed

• experimental

Tags

NGSS.MS-PS2-2

A scientist testing the effects of a chemical on apple growth sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each orchard is counted. Which of the following is the independent variable?

• the chemical

• the number of apples

• the first orchard

• the second orchard

Tags

NGSS.MS-LS1-5

The orchard sprayed with the chemical yields an average of 60 apples per tree, the other orchard yields an average of 40 apples per tree. Based on the data, the scientist would

• report his data

• test the chemical on other plants

• determine that the chemical increases apple yield

• determine that the results were inconclusive

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In order for the apple tree experiment to be valid scientifically, both orchards must:

• be planted in the same location

• receive the same amount of water

• have the same species of apple tree

• all of these

Tags

NGSS.MS-LS1-5

Theories help scientists to:

• explain large bodies of data

• prove hypotheses

• determine truth from lies

• propose how the natural world works

Tags

NGSS.MS-ESS2-2

In a controlled experiment, a scientist is studying how long it takes parachutes of different sizes to fall to the ground. What is the independent variable?

• the size of the parachute

• the height from the parachute is dropped

• the size of the object carried by the parachute

• the time it takes for the parachute to drop

Tags

NGSS.MS-PS2-2

Measurements of the heights of various plants in an experiment are called:

• data

• inquiries

• theories

• inferences

Tags

NGSS.MS-LS2-1

Your friends return from a canoe trip and they are dripping wet. What inference might you make?

• Their clothes are wet

• They are tired

• Their canoe tipped over

• They are skillful at canoeing

Proper experimental setup requires a control group for what purpose?

• to increase the chances that your data will support the hypothesis

• to have something to compare the results with from the experimental group.

• to make sure other scientists can duplicate the experiment

• none of the above.