A3-4 Fair test

In a fair test you should...

• only change one variable (the independent variable)
• change all the variables 
• change no variables 

Tags

NGSS.MS-PS2-2

What is the first thing that a scientist does?

• Experiment

• Make observations

• Ask a question

• Make a prediction

Some risks in science investigations can be managed by

• Wearing goggles

• Not touching things you are allergic to

• Wearing a mask

• Swap substances for something that does not cause allergies

• All of these things

Which of these examples are a solid?

• water
• oxygen
• orange juice
• rock

Matt wants to test which liquid freezes first –Milk or Pepsi. He poured 10 ml of milk in one glass and 10 ml of Pepsi in another glass of same size and kept them in a freezer. After every 10 minutes he checked his freezer and recorded his observations. Pepsi froze first, and then milk. Which factor has he kept same?

• a) Type of liquid

• b) Time it took to freeze

• c) amount of liquid

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS1-4

Betty wants to test which type of phone has the longest battery life - iPhone or Samsung. She bought a new phone for each and charged them completely to 100%. Then, she put each phone on and noted the time it took for the battery to run out of charge. What factor did she change in the experiment?

• a) Type / brand of phone

• b) Time it took the battery to run out of charge.

• c) Time it took to charge to 100%

Kiaan wants to find out which ball will bounce for a longer time. He took two balls of the same size.One ball was made up of plastic and the other ball made up of rubber. He dropped both the balls from the same height. What is the factor he will measure?

• a) Material of the balls.

• b) Height from which the balls are dropped

• c) Time taken for the balls to bounce

Tags

NGSS.MS-PS2-2