3rd grade working scientifically

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

Question 2

Fair tests: which statement is true?

• A. You should change as many things as possible.
• B. You should keep everything else the same.
• C. A fair test means everyone gets a turn.
• D. If a result surprises you, you should hide it.

Question 3

Why is it a good idea to repeat a test several times?

• A. To change the answer
• B. Because the first try never counts
• C. To make the test unfair
• D. To check the results are reliable

Question 4

Look at the bar chart "Rainfall (mm)". What is the total of all the bars?

Answer mm

Question 5

Look at the bar chart "Plant height (cm)". What is the value for dark?

Answer cm

Question 6

Look at the bar chart "Rainfall (mm)". How much more is Wed than Fri?

Answer mm

Question 7

Which question can be answered with a fair test?

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

Question 8

Fair tests: which statement is true?

• A. If a result surprises you, you should hide it.
• B. In a fair test you change only one thing.
• C. One try is always enough.
• D. You should change as many things as possible.

Question 9

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

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

Question 10

Look at the bar chart "Rainfall (mm)". What is the total of all the bars?

Answer mm

Question 11

Look at the bar chart "Minibeasts found". What is the value for pond?

Answer 

Question 12

Look at the bar chart "Rainfall (mm)". How much more is Wed than Mon?

Answer mm

Question 13

Ben tests whether salt water or tap water freezes faster. Which must he keep the same?

• A. the volume of water in each cup
• B. the type of water
• C. the time each one takes to freeze
• D. whether the water has salt

Question 14

Fair tests: which statement is true?

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

Question 15

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

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

Question 16

Look at the bar chart "Paper plane flights (m)". What is the total of all the bars?

Answer m