# Lesson Worksheet: Scientific Investigations Science

In this worksheet, we will practice formulating a measurable question and conducting a reliable investigation.

Q1:

Students in class B are measuring which will dissolve faster in water: salt or sugar. They have written a list of steps to carry out a reliable investigation.

1. Put a cup of water in two beakers.
2. Label the beakers cup A and cup B.
3. Measure a tablespoon of salt and a tablespoon of sugar.
4. Measure the time taken for sugar to dissolve in cup A and salt to dissolve in cup B.
5. Measure the time taken for each substance to dissolve.

What should the next step be?

• ARepeat the steps.
• BForm a conclusion.
• CMake a prediction.

Q2:

Below is a table of types of questions in an investigation.

Measurable Questions How long does it take for ice to melt? What is the color of ice?

Is the following question measurable or nonmeasurable?

What is the temperature of ice?

• ANonmeasurable
• BMeasurable

Is the following question measurable or nonmeasurable?

How does ice taste?

• AMeasurable
• BNonmeasurable

Q3:

A class is investigating the amount of time it takes for sugar and salt to dissolve in water. Below are their results.

 Amount of Salt Used (Teaspoons) Time Taken to Dissolve Salt (Seconds) 2 2 2 3 3 3
 Amount of Sugar Used (Teaspoons) Time Taken to Dissolve Sugar (Seconds) 3 4 5 5 6 7

Are the results reliable or unreliable?

• AThey are unreliable.
• BThey are reliable.

Why are the above results unreliable?

• ADifferent amounts of sugar have been used.
• BThe same amount of sugar has been used.
• CThe investigation has not been repeated.
• DDifferent stopwatches were used.

Q4:

What does the term reliable mean in a scientific investigation?

• AThe investigation is the same throughout.
• BThe investigation is accurate.
• CThe investigation is repeatable.
• DAll of the answers are correct.

Q5:

Natalie and Amelia carry out an experiment to investigate how long it takes for salt and sugar to dissolve in water.

Natalie recorded her results as follows.

 Time Taken to Dissolve Salt (Seconds) Time Taken to Dissolve Sugar (Seconds) 3 3 3 5 4 5

Amelia recorded her results as follows.

 Time Taken to Dissolve Salt (Seconds) 3 6

Fill in the blank to explain why Natalie’s investigation is more reliable than Amelia’s: The results are .

• Arepeated
• Bmeasured inaccurately
• Cin a table

Q6:

Jennifer wanted to see how far the students in her classroom could jump.

She asked the measurable question below:

How far can students jump?

Which of the following describes how an investigation can answer this question?

• AA conclusion is made that shows how far students can jump.
• BStudents’ jumps are measured.
• CA prediction is made on how far the students can jump.
• DAll of the answers are correct.

Q7:

Look at the image.

Which of these is a measurable question for what you observe in this image?

• AWhat type of shoes is the athlete wearing?
• BHow far did the athlete jump?
• CWhat color is the athlete’s hair?
• DWhat material did the athlete jump on?

Q8:

Chloe wanted to use this question in an investigation.

What data does she need to collect?

• ASpeed
• BDistance
• CTemperature

Q9:

Fady and Engy are investigating the masses of different vegetables.

What is the clearest way to record their investigation data?

• AIn a table
• BIn sentences using words
• CIn video or audio recordings
• DIn diagrams and pictures

Q10:

Students in class A want to find out which student can jump the highest.

An investigation is carried out with two students of different heights jumping the high jump.

Which of the following is a likely prediction of the investigation?

• AStudent 1 will jump higher because he is shorter.
• BStudent 1 will not jump as high as student 2.
• CStudent 2 will jump higher because he is shorter.
• DStudent 1 will jump higher because he is taller.