Exploring the Investigative World of Science
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Probe and ponder
SubtopicProbe and ponder under Exploring the Investigative World of Science for Grade 8 CBSE.
Preview questions (no answers)
- 1.
What happens in the 'Data Analysis' phase?
A.Looking for patterns in the results
B.Cleaning the lab
C.Ordering new chemicals
D.Starting the experiment
- 2.
Which of the following is a characteristic of a good hypothesis?
A.It must be true
B.It must be testable
C.It must be long
D.It must be written in red ink
- 3.
Why is it important to wear a lab coat?
A.To look like a doctor
B.To protect clothes and skin from spills
C.Because it is fashionable
D.To stay warm in the lab
- 4.
Which of these is a way to record observations?
A.Tables
B.Drawings
C.Notes
D.All of the above
- 5.
Which of the following represents a safe lab practice?
A.Tasting a substance to identify it
B.Running in the laboratory
C.Labeling all chemical containers clearly
D.Heating a sealed glass jar
- 6.
In an experiment, if the 'dependent variable' does not change when the 'independent variable' is changed, what can you conclude?
A.The variables are directly proportional.
B.The independent variable has no effect on the dependent variable.
C.The experiment is perfect.
D.The hypothesis is automatically proven.
- 7.
If you are measuring of water, which is more accurate?
A.A beaker
B.A graduated cylinder
C.A large bucket
D.A coffee mug
- 8.
During a probe into 'Earth's Structure', it is noted that the 'Outer Core' is in a liquid state. This is primarily inferred from:
A.Drilling to the center of the Earth.
B.Observations of volcanic eruptions.
C.The study of seismic waves (S-waves cannot pass through it).
D.The Earth's gravitational pull.
- 9.
A student investigates 'Force'. They apply a force of on a wall. The wall does not move. What is the net work done in this scientific context?
A.Joules
B.Joules
C.Joules
D.Work cannot be determined without knowing the time.
- 10.
While investigating 'Microorganisms', a scientist finds a virus. Why is the classification of viruses as 'living' or 'non-living' a subject of 'pondering'?
A.Because they are too small to be seen.
B.Because they do not have a cell wall.
C.Because they show characteristics of life only inside a host organism.
D.Because they contain only DNA and no RNA.
Download the worksheet for Exploring the Investigative World of Science - Probe and ponder to practice offline. It includes additional chapter-level practice questions.