Scientific Method

A testable prediction about a scientific investigation is a(n)

• Question
• Observation
• Hypothesis
• Experiment

Tags

NGSS.MS-PS2-2

Which of the following is a necessary quality of a good scientific study?

• It should only include one control variable

• It must involve human subjects

• Others must be able to repeat the test

• It should immediately prove a known theory

The one variable in an experiment that is purposely changed or manipulated by the scientist is the________________.

• dependent variable

• independent variable

• control variable

• control group

Research Question: Does the type of gasoline put in a car affect how fast the car can drive.

What is the independent variable?

• Type of gasoline

• Types of cars

• How fast the car can drive

• Amount of gas put into the car

Tags

NGSS.MS-PS2-2

Research question: Does changing the brand of dog food affect how much the dog eats?

Which variable is highlighted in RED?

• independent

• dependent

• control

Tags

NGSS.MS-LS2-1

Which of the following is usually the first step in any scientific investigation?

• Collecting Data

• Observation

• Drawing conclusions

• Publishing results

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and is planted in the same type of pot. In this test, the independent variable is:

• The type of plant

• The amount of sunlight

• The type of pot used

• The type of liquid

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

NGSS.MS-LS2-4

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and is planted in the same type of pot. The control GROUP is:

• The plant that got milk

• The plant that got water

• The type of pot used

• The height of each plant

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-5

John set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the Dependent variable in this test:

• Distance traveled by the ball

• Height of the ramp

• Mass of the ball

• The type of ball used

Tags

NGSS.MS-PS2-2

The details of the experiment that need to remain UNCHANGED throughout the test are called the:

• predicted variables

• dependent variables

• control variables

• independent variables