Scientific Inquiry and Skills
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Formulating Hypotheses and Variables
SubtopicFormulating Hypotheses and Variables under Scientific Inquiry and Skills for Grade 8 IB.
Preview questions (no answers)
- 1.
A student thinks that 'If the depth of water increases, then the pressure at the bottom will increase.' What is the independent variable?
A.The water pressure
B.The depth of the water
C.The density of the water
D.The container's width
- 2.
When testing how soil type affects plant growth, why should all plants receive the same amount of water?
A.To make sure water is the independent variable
B.To keep water as a control variable
C.To measure the growth accurately
D.To make the plants grow faster
- 3.
A student investigates if the material of a cup affects how long tea stays hot. What is the independent variable?
A.The temperature of the tea
B.The volume of the tea
C.The material of the cup
D.The time elapsed
Download the worksheet for Scientific Inquiry and Skills - Formulating Hypotheses and Variables to practice offline. It includes additional chapter-level practice questions.
Designing Controlled Experiments
SubtopicDesigning Controlled Experiments under Scientific Inquiry and Skills for Grade 8 IB.
Preview questions (no answers)
- 1.
What does the term 'validity' refer to in an experiment?
A.How many times the experiment was repeated
B.Whether the experiment actually tests what it claims to test
C.How expensive the laboratory equipment was
D.The number of people who liked the results
- 2.
Which of the following would be a controlled variable in an experiment testing how the type of soil affects plant height?
A.The height of the plant
B.The type of soil
C.The amount of water given to each plant
D.The growth rate
- 3.
When a scientist shares their results with other scientists to check for errors, what is this process called?
A.Hypothesizing
B.Peer review
C.Data collection
D.Variable control
Download the worksheet for Scientific Inquiry and Skills - Designing Controlled Experiments to practice offline. It includes additional chapter-level practice questions.
Data Collection and Quantitative Analysis
SubtopicData Collection and Quantitative Analysis under Scientific Inquiry and Skills for Grade 8 IB.
Preview questions (no answers)
- 1.
In an experiment, why is it important to change only one independent variable at a time?
A.To save time
B.To ensure that any change in the dependent variable is caused by that specific factor
C.To make the data table smaller
D.Because the lab equipment cannot handle more than one change
- 2.
If a balance is used to measure of salt, what is the 'resolution' or smallest increment of that balance based on this reading?
A.B.C.D. - 3.
What is the purpose of drawing a 'line of best fit' on a scatter plot?
A.To connect every single dot
B.To show the general trend of the data
C.To make the graph look more complicated
D.To hide the outliers
Download the worksheet for Scientific Inquiry and Skills - Data Collection and Quantitative Analysis to practice offline. It includes additional chapter-level practice questions.
Evaluating Scientific Evidence and Methods
SubtopicEvaluating Scientific Evidence and Methods under Scientific Inquiry and Skills for Grade 8 IB.
Preview questions (no answers)
- 1.
What is the purpose of the 'Aim' in a science investigation?
A.To list all the equipment needed
B.To state the purpose or goal of the investigation
C.To describe the safety precautions
D.To show the final results in a table
- 2.
Which of the following would be the most reliable source for scientific information about climate change?
A.A social media post from a friend
B.A peer-reviewed scientific journal article
C.An anonymous blog post
D.A comic book
- 3.
In an experiment, the variable that you measure to see the effect of your change is the:
A.Independent variable
B.Controlled variable
C.Dependent variable
D.Anomalous variable
Download the worksheet for Scientific Inquiry and Skills - Evaluating Scientific Evidence and Methods to practice offline. It includes additional chapter-level practice questions.
Scientific Ethics and Communication
SubtopicScientific Ethics and Communication under Scientific Inquiry and Skills for Grade 8 IB.
Preview questions (no answers)
- 1.
Which of these is the most ethical way to handle a data outlier (a point that is very different from others)?
A.Erase it immediately so the graph looks perfect
B.Investigate why it happened and report it, rather than just hiding it
C.Change its value to match the other points
D.Assume the equipment was broken and write down a different number
- 2.
In science, 'honesty' in communication means:
A.Always telling the truth about your findings, even if they aren't what you hoped for
B.Only telling people the 'good' results
C.Never admitting you made a mistake
D.Telling people what they want to hear so they give you money
- 3.
When labeling a graph, what is 'units'?
A.The names of the scientists
B.Standard quantities like , , or
C.The colors used to draw the bars
D.The paper size of the graph
Download the worksheet for Scientific Inquiry and Skills - Scientific Ethics and Communication to practice offline. It includes additional chapter-level practice questions.