Variables & hypothesis review Q

What is an Independent Variable? *

• A variable that likes to do things by itself

• What a scientist changes in an experiment or investigation

• What a scientist measures in an experiment or investigation

• Any factor that is the same or constant in an experiment or investigation

What is a Dependent Variable? *

• Any factor that is the same or constant in an experiment or investigation

• What a scientist measures in an experiment or investigation

• Mr. B’s clingy cat...

• What a scientist changes in an experiment or investigation

What is a Control Variable? Mark only one oval.

• What a scientist changes in an experiment or investigation

• A variable who is feeling bossy

• Any factor that is the same or constant in an experiment or investigation

• What a scientist measures in an experiment

What is a Hypothesis? Mark only one oval.

• Something a scientist says to sound smart

• An educated guess about a phenomenon written in the "If...then...because" format

• The longest side of a triangle

• A tentative explanation made by a scientist

A hypothesis should be written using what format? Mark only one oval.

• "My hypothesis is..."

• "If...because...then"

• "If...then...because"

• "If...then.."

What is the Independent Variable in this experiment? Mark only one oval.

• The type of food (Kale, Spinach or Seaweed)

• How much Sal eats

• The amount of food Sal is given

• The dish Sal eats from

What is the Dependent Variable in this experiment? Mark only one oval.

• The type of food (Kale, Spinach or Seaweed)

• How much Sal eats

• The amount of food Sal is given

• The dish Sal eats from

Identify TWO Control Variables in Riley's experiment above? Check all that apply.

• The type of food (Kale, Spinach or Seaweed)

• How much Sal eats

• The amount of food Sal is given

• The dish Sal eats from

• None of the above

What is the best hypothesis for Riley's experiment?

• If Sal is given Spinach, Kale and Seaweed, then Sal will eat Spinach the most because it is the yummiest.

• Sal will eat seaweed the most because he would rather be a turtle and live in the sea instead of being a tortoise

• If Sal is given Spinach and Kale, then Sal will eat more kale than spinach

• If Sal is given different food, Sal will eat seaweed the most because it smells nicer

What is the Independent Variable in this experiment? Use this story to answer the next Four questions: A teacher thinks that if they give students candy during a test, they will perform better. They decide to give the same students the same candy on five tests and no candy on five tests. They then measure the grades each student gets to determine if the candy helps students do better on tests.

• The Candy - If a student has or does not have candy on the test

• The Student - Who is taking the test

• The Grade - What grade the student gets on each test

• The Location - Where the students are taking the test