ACME ACADEMY

WEEKLY EVALUATION TEST

Subject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
Student Name:
Roll Number:
Class / Sec:
Date:

GENERAL INSTRUCTIONS:

  1. All questions are compulsory. Carefully read all instructions before starting.
  2. The question paper contains 20 questions.
  3. There is no negative marking for incorrect answers.
  4. Use of mobile phones, smartwatches, or calculators is strictly prohibited during the exam.
1. What is the fundamental purpose of creating a scientific model for a complex natural system?
[1 Mark]
(A) To capture every single detail of the real-world object.
(B) To focus only on the most important factors for a given question while ignoring complex details.
(C) To prove that older theories are entirely incorrect.
(D) To provide an exact mathematical replica of the entire universe.
2. The speed of light is a physical constant denoted by the symbol 'c'. What is the origin of this specific symbol?
[1 Mark]
(A) It stands for the word 'constant'.
(B) It is derived from the Latin word 'celeritas', meaning speed.
(C) It represents the name of the scientist who discovered it.
(D) It stands for 'cosmic velocity'.
3. In scientific terminology, which of the following best describes a 'theory'?
[1 Mark]
(A) A completely untested guess about a natural event.
(B) A regular pattern observed in nature without a specific reason attached.
(C) An explanation of why natural patterns occur, based on careful testing and evidence.
(D) A numerical calculation used to predict the weather.
4. Which of the following is an example of a scientific law?
[1 Mark]
(A) The atomic theory explaining molecule formation.
(B) The fluid-mosaic model of a cell membrane.
(C) Newton's explanation of the jerk felt when a bus stops suddenly.
(D) The hypothesis that an eclipse spoils food.
5. How does the textbook suggest you approach mathematical equations in science?
[1 Mark]
(A) By memorising them purely for finding numerical answers.
(B) By seeing them as independent calculations separate from natural phenomena.
(C) By understanding the real-world situation first and using equations as a compact statement of relationships.
(D) By avoiding them unless absolutely necessary for an exam.
6. Why is it essential to use a shared, international system of units (like SI units) in science?
[1 Mark]
(A) To make science harder for non-scientists to understand.
(B) Because standard units allow global comparison, ensure fairness in trade, and prevent conversion errors.
(C) So that different countries can have their own independent measuring systems.
(D) Because it is a tradition that cannot be changed.
7. When physicist Meghnad Saha studied the light from stars, he treated the star's matter simply as a hot gas. What scientific approach was he primarily applying?
[1 Mark]
(A) Creating a scientific law.
(B) Deliberately simplifying a complex system to build a useful model.
(C) Formulating an entirely new branch of mathematics.
(D) Rejecting previous observational data.
8. What happens to a successful scientific theory when a new prediction fails to match experimental observations?
[1 Mark]
(A) The theory becomes an absolute law.
(B) The failed observation is ignored because the theory is already established.
(C) Scientists re-examine their assumptions, models, or measurements, leading to the refinement of ideas.
(D) The entire branch of science is discarded.
9. Which of the following questions is the MOST scientifically testable to evaluate a weather prediction?
[1 Mark]
(A) Do the clouds look angry today?
(B) Does the wind feel like it will bring rain?
(C) What is today's humidity percentage compared to the last time it rained?
(D) Is it going to rain, yes or no?
10. Why is the skill of estimation highly valued in scientific reasoning?
[1 Mark]
(A) It provides the exact decimal calculation required for research.
(B) It helps build intuition and detects errors by checking if a numerical answer makes logical sense.
(C) It allows scientists to avoid doing real experiments.
(D) It replaces the need for standard units.
11. When modeling the basic effect of gravity on a falling object, which factor is most frequently ignored to keep the model simple?
[1 Mark]
(A) The object's mass
(B) The gravitational pull
(C) Air resistance
(D) The time of fall
12. What makes scientific prediction different from a random guess?
[1 Mark]
(A) Predictions are reasoned expectations based on past evidence and careful thinking.
(B) Predictions always come true 100% of the time.
(C) Predictions do not require any prior knowledge of the subject.
(D) Predictions are made without mathematical models.
13. Assertion (A): No scientific theory is ever considered strictly final or beyond question. Reason (R): Science relies on evidence, and theories are modified when new observations do not match predicted outcomes.
[1 Mark]
(A) Both A and R are true, and R is the correct explanation of A.
(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
14. In aviation history, a passenger aircraft once ran out of fuel mid-flight. According to the chapter, what was the scientific cause of this error?
[1 Mark]
(A) The ground crew forgot to fuel the aircraft entirely.
(B) A miscalculation occurred because fuel density was measured in pounds per litre instead of kilograms per litre.
(C) The aircraft's fuel tank had a massive leak.
(D) The pilot ignored the fuel gauge readings.
15. If a person takes 15 breaths a minute, and one breath has a volume of 0.5 litres, what is the approximate estimated volume of air breathed in one hour?
[1 Mark]
(A) 450 litres
(B) 900 litres
(C) 1500 litres
(D) 7.5 litres
16. If you are building a simple mathematical model to predict if a struck cricket ball will cross the boundary, which of the following factors should you definitely INCLUDE in your calculations?
[1 Mark]
(A) The brand sticker on the cricket bat.
(B) The speed and direction in which the ball is hit.
(C) The colour of the bowler's shoes.
(D) The stitching pattern on the seam of the ball.
17. Why do weather forecasts generally become less reliable the further they predict into the future?
[1 Mark]
(A) Because meteorologists stop collecting data after 24 hours.
(B) Because tiny differences in initial atmospheric conditions grow exponentially over time.
(C) Because clouds move too fast to be seen by satellites.
(D) Because standard units do not apply to the atmosphere.
18. A viral social media post claims that 'food becomes toxic during a solar eclipse.' Using scientific reasoning, which question best disproves this claim?
[1 Mark]
(A) What type of food is being eaten during the eclipse?
(B) Are people eating inside or outside?
(C) What chemical or physical mechanism in a mere shadow could cause food to suddenly rot?
(D) How long does the eclipse last?
19. A student wishes to estimate the monthly rice requirement for a family of four using approximate reasoning. If an adult needs 2000 kcal per day, and 100g of rice gives 130 kcal, which calculation approach is most logical for a rough 30-day estimate assuming they only eat rice?
[1 Mark]
(A) Multiply 100g by 4 people.
(B) Divide 2000 by 130 to find 100g portions per day per person, multiply by 4 people, then by 30 days.
(C) Multiply 2000 kcal by 30 days directly.
(D) Guess an arbitrary number like 500 kilograms.
20. While science textbooks are divided into subjects like physics, chemistry, and biology, real-world problems like climate change do not fit into just one category. What does this indicate about the nature of scientific disciplines?
[1 Mark]
(A) Subject divisions are artificial human constructs designed to organize knowledge, but natural phenomena are deeply interconnected.
(B) Physics is the only true science, and the rest are unnecessary.
(C) Real-world problems can never be solved by science.
(D) Biologists are not allowed to use mathematical equations.
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