8 वी - ICSE बोर्ड - Science टेस्ट - चॅप्टर 1 - Exploring the investigative world of Science
8 वी - ICSE बोर्ड - Science टेस्ट - चॅप्टर 1 - Exploring the investigative world of Science
4) अशाच प्रकारे या प्रकरणात सांगितल आहे की, कोणताही प्रयोग करत असतांना प्रयोगादरम्यान एका वेळी फक्त एकच गोष्ट बदलायची, बाकी सर्व गोष्टी स्थिर ठेवायच्या.
5) तसेच प्रेशर कुकर मध्ये पाण्याचा Boiling Point वाढतो, ज्यामुळे प्रेशर कुकर मध्ये भात किंवा अन्न लवकर शिजते.
6) याच पद्धतीने गरम पाण्यात बर्फ लवकर वितळतो कारण गरम पाण्यात Heat Transfer वेगाने होते आणि बर्फ लवकर वितळायला सुरुवात होते.
Que 1
In the Grade 8 Curiosity textbook, what does the 'Root' symbol at the bottom of the left-hand pages represent?
A. Creative and wild ideas
B. Deep knowledge and observations
C. Biological plant structures
D. Future career paths
Que 2
What does the 'Kite' symbol at the top of the right-hand pages represent?
A. Logical analysis of data
B. Wind speed and atmospheric pressure
C. Curiosity and imagination
D. Standard rules of laboratory safety
Que 3
Which of the following represents a systematic question raised at the beginning of the chapter to spark inquiry?
A. How many stars are in our galaxy?
B. Why do cut apples turn brown?
C. Which plant has the largest leaf?
D. What is the formula for gravity?
Que 4
Why does rice cook much faster in a pressure cooker than in an open pot?
A. Lower boiling point of water
B. Chemical softening of metal
C. Slowing down of heat transfer
D. Higher boiling point of water
Que 5
Why does ice dissolve or melt more rapidly in warm water than in cold water?
A. Faster heat energy transfer
B. Lower density of ice
C. Decreased molecular movement
D. Higher chemical stability
अजून वाचून पहा : 8 वी - महाराष्ट्र बोर्ड - गणित टेस्ट - चॅप्टर 1 - Rational and Irrational numbers
Que 6
What is the primary cause of a puri puffing up like a balloon during frying?
A. Carbon dioxide from yeast
B. Steam expansion inside the dough
C. Absorption of frying oil
D. Sinking air from outside
Que 7
In the puffy puri investigation, why is one side of the puri typically thinner than the other?
A. The dough rolls out unevenly
B. Oil cools down the top layer
C. Steam pushes the un-fried side
D. One side burns more rapidly
Que 8
If you want to investigate how dough thickness affects the puffiness of a puri, what is the 'independent variable'?
A. Thickness of the rolled dough
B. Temperature of the oil
C. Time it takes to puff
D. Type of frying pan used
Que 9
Why do puris made from fresh dough generally puff up better than those made from stored dough?
A. Dry and hard surface layer
B. Higher moisture and elasticity
C. Absence of starch molecules
D. Increased fat from resting
Que 10
What is the 'Golden Rule' of conducting a fair scientific investigation?
A. Change all variables together
B. Use only complex digital tools
C. Predict only correct results
D. Change only one variable
Que 11
In a scientific investigation, what is the 'dependent variable'?
A. The factor kept completely constant
B. The factor that you change
C. The factor being observed or measured
D. The equipment used to heat samples
Que 12
What is the primary role of a 'Science Notebook' during systematic investigations?
A. Recording all observations honestly
B. Drawing purely decorative pictures
C. Writing answers to skip experiments
D. Listing grades and exam marks
Que 13
According to the Grade 8 thematic roadmap, what invisible world is introduced in Chapter 2?
A. The structure of tectonic plates
B. The world of microorganisms
C. The chemical bonds in atoms
D. The magnetic fields of Earth
Que 14
According to Chapter 3 of the Grade 8 roadmap, 'Health' is defined as:
A. Eating only raw organic vegetables
B. The absolute absence of pathogens
C. Complete physical, mental, and social well-being
D. Avoiding all physical exercise
Que 15
According to the Grade 8 Science syllabus preview, which system in our body actively defends us against disease? A. Immune system B. Digestive system C. Respiratory system D. Excretory system
Que 16
Which physical forces will Grade 8 students investigate to understand changes in motion, speed, or direction?
A. Nuclear fusion and stellar forces
B. Gravity, friction, and applied forces
C. Chemical bonding and valence forces
D. Biological muscular digestion forces
Que 17
What primary atmospheric factor creates winds, breezes, storms, and cyclones?
A. Air pressure differences
B. Soil mineral concentration
C. Frictional movement of tectonic plates
D. Gravitational pull of the outer planets
Que 18
How are particles arranged in a solid compared to a gas?
A. Sparsely packed and moving freely
B. Completely motionless with zero energy
C. Floating in chemical solutions
D. Tightly packed and vibrating in place
Que 19
In chemistry, what is a pure substance consisting of only one type of atom called?
A. Compound
B. Mixture
C. Element
D. Solution
Que 20
What is formed when two or more elements chemically join together in fixed proportions?
A. Compound
B. Heterogeneous mixture
C. Solute
D. Unstable isotope
Que 21
In a liquid mixture like sweet tea, what is the 'solvent'?
A. The solid sugar being dissolved
B. The liquid doing the dissolving
C. The chemical bonds being broken
D. The gas escaping from the surface
Que 22
What is the scientific term for light bouncing off a shiny surface like a mirror?
A. Refraction
B. Absorption
C. Reflection
D. Dispersion
Que 23
How do corrective eyeglasses help people with blurry vision see clearly?
A. Bending light using refraction
B. Reflecting light away completely
C. Generating their own green light
D. Changing the color of objects
Que 24
What creates the changing shapes (phases) of the Moon we see from Earth?
A. Earth casting its shadow every night
B. Moon reflecting sunlight at different angles
C. Clouds blocking the Moon's surface
D. Changes in the Moon's temperature
Que 25
Historically, what cyclic cosmic events did humans use to create early calendars?
A. Eruptions of active volcanoes
B. Migrations of deep sea fish
C. Collisions of distant asteroids
D. Movements of the Sun and Moon
Que 26
What is a community of living organisms interacting with non-living factors in their environment called?
A. Biosphere
B. Ecosystem
C. Niche
D. Population
Que 27
Why has nature created such a vast variety of plants and animals on Earth?
A. To maintain balance in ecosystems
B. To cause global resource shortages
C. To slow down plant reproduction
D. To speed up climate change
Que 28
What gas is released in large amounts by burning fossil fuels, contributing to global warming?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Helium
Que 29
Which human activity listed in the Chapter 1 preview is a major contributor to rising global temperatures?
A. Deforestation
B. Crop rotation
C. Using solar power
D. Rainwater harvesting
Que 30
What does it mean to 'investigate like a scientist'?
A. Memorizing textbook facts without testing
B. Using a step-by-step evidence method
C. Accepting all claims without questioning
D. Guessing solutions without any data
इथून खाली टेस्ट द्यायला सुरुवात करायची आहे.
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