Plan a fair experiment

Grade 6 Science Worksheet - Challenge Me

Circle the best answer.

1. 1.

   Groups, warm: 1 spoon, stirred, cold: 3 spoons, not stirred. Esme's plan: warm circle water gets 1 spoon of sugar, cold circle water gets 3 spoons, and only the warm glass is stirred. Which fix makes it fair?

   • Use 3 spoons in each, but stir just the warm glass
   • Use 1 spoon in each and stir both the same way
   • Keep the plan, since it already compares temperatures
   • Use warm water in both glasses
2. 2.

   Groups, 1 soaked seed. Jun's plan: soak 1 seed overnight, plant it, and count the days until it sprouts. What is the best fix?

   • Soak 10 seeds, keep 10 dry, and plant all alike
   • Soak the 1 seed for longer
   • Plant the soaked seed in a sunnier spot
   • Soak 2 seeds instead of 1
3. 3.

   Table, Trials, with columns Trial 1, Trial 2, Trial 3. Luz's friend says one trial is enough if you are careful. Which response is best?

   • Agree: more trials would change the variables
   • Disagree: repeat trials catch odd results
   • Agree: careful work has no odd results
   • Disagree: each trial needs its own new hypothesis
4. 4.

   "If ..., then ...". Investigation card: hypothesis, If ..., then .... Noah's friend says a hypothesis is just a guess, so any statement works. Which response is best?

   • Agree: any guess counts as a hypothesis
   • Disagree: a hypothesis must be shown to be true before testing
   • Disagree: it is a testable prediction about two variables
   • Agree: a hypothesis does not need testing
5. 5.

   Four plan cards beside a ball and a meter stick. Pia wants to know whether drop height changes bounce height. Which plan is best?

   • Drop the same ball from 3 heights, 3 times each, same floor
   • Drop 3 different balls from one height
   • Drop the ball once from each height
   • Drop from 3 heights onto 3 different floors
6. 6.

   What is changed, magnets in stack: 1, 2, 3; what is measured, blank. Ren tests whether stacking more magnets changes how many paper clips they pick up. What should Ren record?

   • Clips picked up, with a different clip size for each stack
   • The paper clips picked up on 1 trial
   • The color of each magnet
   • Magnets in the stack and clips picked up, for 3 trials
7. 7.

   Four blank table headers. Which results table fits Tala's plant-and-light test?

   • Light level and the height of 1 plant
   • Light level, heights of 3 plants, average height
   • Plant name and favorite color
   • Light level and height, with a different soil in each row
8. 8.

   Note: average of 3 trials. Sugar dissolved in 40 seconds on average in warm circle water and 95 seconds in cold. Which conclusion fits Zee's data?

   • Sugar dissolved faster in the cold water in this one test
   • Warm water dissolves anything faster
   • Warm water is the nicer kind of water
   • Sugar dissolved faster in the warm water in this test
9. 9.

   Note: average of 3 drops. Which conclusion fits Ari's bounce data?

   • The ball bounced back to its full drop height
   • Higher drops gave higher bounces for this ball
   • Higher drops gave lower bounces
   • Balls of any kind bounce higher from higher drops
10. 10.

    Note: 10 seeds per group. Bo's hypothesis: if seeds are soaked, they will sprout sooner. Ten seeds were in each group. What do the data say?

    • The data show soaked seeds grow into bigger plants
    • They support it: soaked seeds sprouted 2 days sooner
    • The data do not support it; dry seeds sprouted first
    • Seeds sprout because they wish to grow