Chapter-1 The Wonderful World of Science — Online MCQ Test
SCIENCE · Grade 6 · CBSE(NCERT)
Practice Chapter-1 The Wonderful World of Science with a free chapter-wise online MCQ test.
This chapter covers: observation - experimentation - hypothesis.
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Chapter-1 The Wonderful World of Science — Important Questions & Answers
What is science?
- A. A systematic study of nature and natural phenomena through observation and experimentation
- B. A collection of random facts about the world
- C. Only the study of living things
- D. Knowledge that cannot be tested or verified
Answer: A. A systematic study of nature and natural phenomena through observation and experimentation
Science is defined as a systematic method of studying nature using observation, experimentation, and logical reasoning to understand natural phenomena.
Science is defined as a systematic method of studying nature using observation, experimentation, and logical reasoning to understand natural phenomena.
Which of the following is the first step in the scientific method?
- A. Conclusion
- B. Observation
- C. Experimentation
- D. Hypothesis
Answer: B. Observation
Observation is the foundation of scientific inquiry, where scientists carefully notice and record details about natural phenomena before forming hypotheses.
Observation is the foundation of scientific inquiry, where scientists carefully notice and record details about natural phenomena before forming hypotheses.
What does 'controlled variable' mean in an experiment?
- A. A factor that is intentionally changed
- B. A factor that is kept the same to ensure fair testing
- C. A factor that cannot be measured
- D. A factor that is observed but not recorded
Answer: B. A factor that is kept the same to ensure fair testing
Controlled variables are factors kept constant in an experiment to ensure that any observed changes result from the independent variable alone.
Controlled variables are factors kept constant in an experiment to ensure that any observed changes result from the independent variable alone.
Compare observation and inference. Which statement is correct?
- A. Observation and inference are the same thing
- B. Observation is direct sensory information; inference is a conclusion based on observations
- C. Inference comes before observation in the scientific method
- D. Observations are less reliable than inferences
Answer: B. Observation is direct sensory information; inference is a conclusion based on observations
Observation involves gathering direct data through senses, while inference draws logical conclusions from those observations—they are distinct but complementary steps.
Observation involves gathering direct data through senses, while inference draws logical conclusions from those observations—they are distinct but complementary steps.
A medicine company claims their drug increases energy based on testimonials from satisfied customers. Why is this NOT a reliable scientific conclusion?
- A. Because customer satisfaction is always accurate
- B. Because testimonials lack controlled conditions and may reflect placebo effects or bias
- C. Because medicines never actually work
- D. Because there are too many customers
Answer: B. Because testimonials lack controlled conditions and may reflect placebo effects or bias
Testimonials are anecdotal evidence lacking scientific rigor; actual energy levels must be measured in controlled experiments with control groups to eliminate placebo effects.
Testimonials are anecdotal evidence lacking scientific rigor; actual energy levels must be measured in controlled experiments with control groups to eliminate placebo effects.