Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects

Science

Hypothesis and experimentation

In Class 9 Science, within “Exploration: Entering the World of Secondary Science,” students learn how scientific questions can be turned into testable hypotheses. They examine the difference between an observation, an inference, and a prediction; identify variables and controls; plan fair experiments; and record evidence carefully. The topic develops skills in measuring, organizing data, interpreting results, recognizing sources of error, and drawing conclusions supported by evidence. Students also understand that experiments refine ideas rather than simply prove them.

Expert · Level 6 · 25 questions

TOPIC PRACTICE

Quiz this set

Up to 25 questions from this page. Select your focus, then start.

25 questions

Choose questions
View options
  1. Different calibrations may make measurements difficult to compare
  2. The hypothesis will become more testable
  3. The control group will become stronger
  4. The sample will become random automatically
View options
  1. All repeated acidic-water groups showing more germination than the control
  2. One seed failing to germinate
  3. The control label being erased
  4. One seed changing colour
View options
  1. It reduces the tendency to create a prediction after seeing the result
  2. It removes all errors
  3. It removes the need for a control group
  4. It makes the result certain
View options
  1. Compare only final height
  2. Ignore initial height
  3. Compare the change in height and account for the initial difference
  4. Remove taller plants from the result
View options
  1. Use only an untreated group
  2. Use several graded doses and a control group
  3. Use a different species in each group
  4. Test only the highest dose
View options
  1. Confirmation bias
  2. Random selection
  3. Calibration
  4. Reproduction
View options
  1. The results support the hypothesis under the tested conditions
  2. The hypothesis can never be wrong now
  3. The experiment created a law of nature
  4. All other explanations are impossible
View options
  1. To show that the expected effect should not occur without the treatment
  2. To increase the effect in every group
  3. To change the independent variable
  4. To reduce the number of data points
View options
  1. To check that the experimental setup can detect a known effect
  2. To prove that no effect exists
  3. To randomise the sample
  4. To remove all controlled variables
View options
  1. The measurement may be subjective and vague
  2. The independent variable disappears
  3. The experiment has no sample
  4. A control group forms automatically
View options
  1. Testing plants in several soil types
  2. Testing only two plants of one special variety in one room
  3. Repeating the experiment at different locations
  4. Taking a large representative sample
View options
  1. They are both accurate and precise
  2. They are precise but not accurate
  3. They are accurate but not precise
  4. They are neither measurements nor data
View options
  1. Keeping water as a controlled variable
  2. Making water the dependent variable
  3. Making light a controlled variable
  4. Changing the sampling method
View options
  1. Increasing length will increase the time for the same number of oscillations
  2. Increasing mass will decrease length
  3. Every pendulum will take the same time
  4. The pendulum will oscillate without motion
View options
  1. It creates bias by changing the question to fit the result
  2. It increases the sample size
  3. It calibrates the instrument
  4. It creates a control group
View options
  1. A decisive test in which the two hypotheses predict different outcomes
  2. Repeat the same test without change
  3. Write only one hypothesis
  4. Hide the result
View options
  1. The measurement method was inconsistent
  2. The sample became random
  3. The hypothesis became falsifiable
  4. The experiment became double-blind
View options
  1. It leads the respondent toward one answer
  2. It is completely random
  3. It contains no words
  4. It calibrates the measuring instrument
View options
  1. The estimate became more reliable
  2. The hypothesis became automatically true
  3. The independent variable disappeared
  4. Systematic error was definitely removed
View options
  1. It allows evidence to be collected while reducing risk of harm
  2. It always makes the hypothesis correct
  3. It changes all controlled variables
  4. It makes results attractive
View options
  1. Minimise unnecessary harm and use the minimum adequate sample
  2. Cause maximum suffering to obtain clear results
  3. Ignore consent and care
  4. Treat all organisms merely as instruments
View options
  1. When multiple reliable results do not agree with the original hypothesis
  2. When the student wants a correct answer
  3. When the options seem difficult
  4. When there is little space to write the result
View options
  1. A measure of spread or variability
  2. The colour of the laboratory wall
  3. The length of the question
  4. The student's handwriting
View options
  1. Conclusion then question then data then hypothesis
  2. Question then hypothesis then controlled experiment then analysis then conclusion
  3. Alter data then select results then form a question
  4. Declare the hypothesis proven then abandon the experiment
View options
  1. Treat the difference as final proof
  2. Check the result using more samples and repeated trials
  3. Remove less favourable data
  4. Eliminate the control group

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.