Lesson 1-2

What is the use of scientific methods to test your hypothesis?

• surveys

• experiment

• models

• sampling

Scientific investigation usually begins with

• a question

• an observation

• a problem

• any of these

What type of investigation is where scientists use an object to represent something?

• sampling

• survey

• model

• experiment

Why do we use models?

• things are too large to study

• things have too many parts

• things are difficult to observe directly

• all of these

What kind of investigation is where a scientist gives a questionnaire to a number of people whose answers are recorded and analyzed?

• sampling

• survey

• model

• experiment

What kind of investigation is where scientists examine random individuals from a population?

• sampling

• survey

• model

• experiment

What is the thing in a test that you can change in a test?

• experiment

• control group

• variable

• model

How many variables can be tested at one time?

• 4

• 3

• 2

• 1

Which kind of variable is the thing that you change in your test?

• dependent

• independent

Which variable is the thing you measure or observe?

• dependent

• independent