Chapter 1: The Ever Evolving World of Science — Online MCQ Test
SCIENCE · Grade 7 · CBSE(NCERT)
Practice Chapter 1: The Ever Evolving World of Science with a free chapter-wise online MCQ test.
This chapter covers: Scientific method Observation Hypothesis Experiment Variables Data analysis Discovery Evidence Conclusion Scientific inquiry.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 1: The Ever Evolving World of Science — Important Questions & Answers
What is the first step in the scientific method?
- A. Observation
- B. Conclusion
- C. Experiment
- D. Data analysis
Answer: A. Observation
Scientific inquiry usually begins with careful observation of a phenomenon or problem. This helps a scientist decide what to study next.
Scientific inquiry usually begins with careful observation of a phenomenon or problem. This helps a scientist decide what to study next.
A hypothesis is best described as:
- A. A final proven result
- B. An educated guess or possible explanation
- C. A scientific law
- D. A random idea with no evidence
Answer: B. An educated guess or possible explanation
A hypothesis is a possible explanation based on observations. It can be tested through experiments.
A hypothesis is a possible explanation based on observations. It can be tested through experiments.
A student wants to test whether plants grow better in sunlight or shade. What should be kept the same in both groups?
- A. Amount of water
- B. Type of plant and amount of water
- C. Only the height of the plant
- D. The place where the experiment is written
Answer: B. Type of plant and amount of water
In a fair test, most conditions should remain the same except the variable being tested. Here, plant type and water amount should be kept constant.
In a fair test, most conditions should remain the same except the variable being tested. Here, plant type and water amount should be kept constant.
A student tests the effect of salt on the boiling point of water. Which of the following is the dependent variable?
- A. Amount of salt added
- B. Boiling point of water
- C. Type of container used
- D. Room temperature
Answer: B. Boiling point of water
The dependent variable is the result that is measured in the experiment. Here, the boiling point is measured to see the effect of salt.
The dependent variable is the result that is measured in the experiment. Here, the boiling point is measured to see the effect of salt.
Which of the following best shows scientific inquiry?
- A. Accepting a claim without checking it
- B. Asking questions, testing ideas, and using evidence
- C. Choosing only the answer that sounds right
- D. Copying results without observation
Answer: B. Asking questions, testing ideas, and using evidence
Scientific inquiry involves questioning, investigating, and using evidence to understand a problem. It is the foundation of science.
Scientific inquiry involves questioning, investigating, and using evidence to understand a problem. It is the foundation of science.