Scientific Method and Experimental Scenarios

Ms. Forbes is attempting to test which parachute keeps her eggs from breaking when thrown from the roof of her house (this is what she does on the weekends). The type of parachute is....

• the independent variable

• the dependent variable

• a constant variable

• a waste of money

Ms. Forbes is attempting to test which parachute keeps her eggs from breaking when thrown from the roof of her house (this is what she does on the weekends). The height of her roof is....

• the independent variable

• the dependent variable

• a constant variable

• a waste of money

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

NGSS.MS-PS2-2

Does the brand of bubble gum affect the bubble size? Which hypothesis is INCORRECT?

• If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the biggest bubble with Bubblelicious.

• If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the smallest bubble with Big Red.

• If I chew Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, I will blow the largest bubble with Juicy Fruit.

• If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the smallest bubble with Hubba Bubba.

How does a hypothesis begin?

• After writing procedures

• After making observations and doing research on a phenomena

• After buying materials for an experiment

A hypothesis is based on observations and research

• True

• False

Jill is testing the effect of caffeine on the breathing rate of betta fish. She sets up two fish tanks with identical conditions. She places 10 betta fish in each tank. She adds caffeine to one tank and nothing to the other tank. She then counts the operculum plate movement per minute for the fish in each tank.

What scientific question is the above experiment attempting to answer?

• What effect does caffeine have on betta fish?

• Will caffeine affect the heart rate of betta fish?

• Does caffeine affect the breathing rate of betta fish?

• Is the amount of caffeine affected by the betta fish?

John believes the water plant Elodea will produce more oxygen when placed closer to a light source. He places four Elodea plants of the same height at varying distances from a lamp: 1 meter, 2 meters, 3 meters, and 4 meters. The plants are in identical aquariums with a beaker placed over each plant. The oxygen content inside the beaker is measured after each plant sits for 8 hours.

Which question best describes John's experiment?

• Does the amount of oxygen affect the amount of light needed by the plant?

• Does a plant produce more oxygen when it is placed closer to a light source?

• How does the type of plant affect the oxygen produced when placed by a lamp?

• Will the light affect how much the Elodea plant grows when placed in the light?

Tags

NGSS.MS-LS2-1

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 listens to the same music. In this investigation, the independent variable is ...

• The type of plant

• The amount of sunlight

• The type of music

• The type of liquid

Which of the following terms refers to factors that remain the same in all groups?

• Constants

• Dependent variables

• Exemplars

• Independent variables

Which of the following terms refers to the group that receives no treatment with the independent variable?

• Constant group

• Control group

• Dependent group

• Experimental group