MAP Applied Methods and Techniques 3 — Questions and Answers
Question 1: A scientist repeats an experiment several times with the same procedure. What is the main purpose of repeated trials?
- To change the independent variable
- To make the results more reliable (Correct answer)
- To create a new hypothesis
- To remove the need for a control
Correct answer: To make the results more reliable
Repeated trials reduce the effect of random error and increase reliability.
Question 2: Which statement is a testable hypothesis?
- Plants are the most beautiful living things.
- If plants receive more light, then they will grow taller. (Correct answer)
- Plants should be watered every day.
- Plants were first grown in gardens long ago.
Correct answer: If plants receive more light, then they will grow taller.
A testable hypothesis predicts a measurable relationship between variables, often in an if-then form.
Question 3: A data set is 4, 7, 7, 9, 23. Which measure of center is most affected by the outlier 23?
- Mean (Correct answer)
- Median
- Mode
- None of them
Correct answer: Mean
The mean uses every value, so an extreme value pulls it strongly.
Question 4: While researching a topic, which source is generally the most credible?
- An anonymous blog post
- A social media comment
- A peer-reviewed journal article (Correct answer)
- A product advertisement
Correct answer: A peer-reviewed journal article
Peer-reviewed articles are checked by experts before publication.
Question 5: To solve a multi-step word problem, which strategy should a student usually use first?
- Guess an answer and move on
- Identify what the question is asking and the given information (Correct answer)
- Compute every number in the problem
- Draw a pie chart
Correct answer: Identify what the question is asking and the given information
Understanding the question and given facts is the first step in problem solving.
Question 6: A map uses a scale of 1 inch = 50 miles. Two cities are 3.5 inches apart on the map. What is the actual distance?
- 53.5 miles
- 150 miles
- 175 miles (Correct answer)
- 200 miles
Correct answer: 175 miles
3.5 × 50 = 175 miles.
Question 7: In an experiment on how water temperature affects sugar dissolving time, which should be kept constant?
- Water temperature
- Dissolving time
- Amount of sugar and water (Correct answer)
- The result of each trial
Correct answer: Amount of sugar and water
Controlled variables like sugar and water amounts must stay the same so only temperature changes.
MAP Applied Methods and Techniques 3
A scientist repeats an experiment several times with the same procedure.
What is the main purpose of repeated trials?