Planning a fair test

Question 1

Omar tests how the length of a guitar string changes its note. He uses strings of different lengths. What else should stay the same?

• A. the length of the strings
• B. the note he hears
• C. nothing else matters
• D. how tight and thick the strings are

Question 2

Fair tests: which statement is true?

• A. One try is always enough.
• B. Repeating a test helps you check your results.
• C. You should change as many things as possible.
• D. A fair test means everyone gets a turn.

Question 3

Isla tests which ball bounces highest. She drops one ball from 1 m and another from 2 m. What is wrong?

• A. Nothing, it is fair
• B. She should use only one ball
• C. She should not measure the bounce
• D. The drop height should be the same

Question 4

Which question can be answered with a fair test?

• A. Who is the best scientist?
• B. Is a rainbow beautiful?
• C. What is your favourite plant?
• D. Does a heavier parachute fall faster?

Question 5

Fair tests: which statement is true?

• A. If a result surprises you, you should hide it.
• B. A fair test means everyone gets a turn.
• C. A prediction says what you think will happen.
• D. You should change as many things as possible.

Question 6

Isla tests which ball bounces highest. She drops one ball from 1 m and another from 2 m. What is wrong?

• A. She should use only one ball
• B. The drop height should be the same
• C. She should not measure the bounce
• D. Nothing, it is fair

Question 7

Aisha measures how fast sugar dissolves in water at different temperatures. What does she measure?

• A. the time for the sugar to dissolve
• B. the type of cup
• C. the colour of the sugar
• D. the temperature of the water

Question 8

Fair tests: which statement is true?

• A. One try is always enough.
• B. You should keep everything else the same.
• C. You should change as many things as possible.
• D. A fair test means everyone gets a turn.

Question 9

Priya tests which surface a toy car rolls furthest on. What must she keep the same?

• A. the height of the ramp
• B. nothing
• C. the type of surface
• D. how far the car rolls

Question 10

Aisha measures how fast sugar dissolves in water at different temperatures. What does she measure?

• A. the temperature of the water
• B. the time for the sugar to dissolve
• C. the type of cup
• D. the colour of the sugar

Question 11

Fair tests: which statement is true?

• A. If a result surprises you, you should hide it.
• B. You should change as many things as possible.
• C. You should keep everything else the same.
• D. One try is always enough.

Question 12

Isla tests which ball bounces highest. She drops one ball from 1 m and another from 2 m. What is wrong?

• A. She should use only one ball
• B. Nothing, it is fair
• C. The drop height should be the same
• D. She should not measure the bounce

Question 13

Aisha measures how fast sugar dissolves in water at different temperatures. What does she measure?

• A. the colour of the sugar
• B. the type of cup
• C. the time for the sugar to dissolve
• D. the temperature of the water

Question 14

Fair tests: which statement is true?

• A. One try is always enough.
• B. A prediction says what you think will happen.
• C. If a result surprises you, you should hide it.
• D. You should change as many things as possible.

Question 15

Leo tests which paper towel soaks up the most water. What should he change?

• A. the time he waits
• B. the type of paper towel
• C. the size of the towel
• D. the amount of water

Question 16

Omar tests how the length of a guitar string changes its note. He uses strings of different lengths. What else should stay the same?

• A. how tight and thick the strings are
• B. the note he hears
• C. nothing else matters
• D. the length of the strings