Podcast
Questions and Answers
Which unit is used to measure mass?
Which unit is used to measure mass?
A cubic metre is a unit of length.
A cubic metre is a unit of length.
False
What is the method used to mix solutions by tapping the test tube?
What is the method used to mix solutions by tapping the test tube?
Gently tap the test tube with the index finger.
To measure length, we usually use a _____.
To measure length, we usually use a _____.
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Match the following measurements with their units:
Match the following measurements with their units:
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What is a primary focus of science?
What is a primary focus of science?
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Scientific knowledge can answer all questions about Nature.
Scientific knowledge can answer all questions about Nature.
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What role do experiments play in science?
What role do experiments play in science?
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The discovery of __________ helped understand that some microorganisms cause diseases.
The discovery of __________ helped understand that some microorganisms cause diseases.
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Match the following scientific contributions with their impact:
Match the following scientific contributions with their impact:
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Which of the following is a limitation of scientific knowledge?
Which of the following is a limitation of scientific knowledge?
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Scientific discoveries have not led to improvements in our quality of life.
Scientific discoveries have not led to improvements in our quality of life.
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Which piece of equipment should always be worn when heating or mixing substances?
Which piece of equipment should always be worn when heating or mixing substances?
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It is safe to eat and drink in the laboratory.
It is safe to eat and drink in the laboratory.
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What should you do if you notice an accident in the laboratory?
What should you do if you notice an accident in the laboratory?
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Always keep the laboratory _____ and tidy.
Always keep the laboratory _____ and tidy.
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Which item is used to extinguish fires in the laboratory?
Which item is used to extinguish fires in the laboratory?
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Match the laboratory equipment with their purposes:
Match the laboratory equipment with their purposes:
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You should point a test tube towards yourself when heating it.
You should point a test tube towards yourself when heating it.
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What should you keep away from flames and sparks?
What should you keep away from flames and sparks?
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After conducting experiments, it is important to _____ hands thoroughly.
After conducting experiments, it is important to _____ hands thoroughly.
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Which piece of laboratory equipment is primarily used to hold liquids and can withstand heat?
Which piece of laboratory equipment is primarily used to hold liquids and can withstand heat?
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What protection should be worn while conducting experiments?
What protection should be worn while conducting experiments?
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A dropper is used to measure and transfer large volumes of liquid accurately.
A dropper is used to measure and transfer large volumes of liquid accurately.
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It is safe to conduct experiments without proper ventilation.
It is safe to conduct experiments without proper ventilation.
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What is the purpose of filter paper in laboratory experiments?
What is the purpose of filter paper in laboratory experiments?
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What is the first step to take in the event of a laboratory accident?
What is the first step to take in the event of a laboratory accident?
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The _______ is used to support the Bunsen burner and hold other apparatus.
The _______ is used to support the Bunsen burner and hold other apparatus.
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Match the following laboratory apparatus to their functions:
Match the following laboratory apparatus to their functions:
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A fire can be extinguished by removing any one or more of the conditions in the fire ______.
A fire can be extinguished by removing any one or more of the conditions in the fire ______.
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What is the first step when transferring solution from a reagent bottle to a test tube?
What is the first step when transferring solution from a reagent bottle to a test tube?
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Match the type of laboratory accident to its emergency action:
Match the type of laboratory accident to its emergency action:
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The conical flask is designed to allow for easy mixing of solutions due to its narrow neck.
The conical flask is designed to allow for easy mixing of solutions due to its narrow neck.
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What should be done when chemicals give off toxic or irritating gases?
What should be done when chemicals give off toxic or irritating gases?
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What should be done immediately after pouring a solution from a reagent bottle?
What should be done immediately after pouring a solution from a reagent bottle?
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The three conditions necessary for a fire to occur are fuel, high temperature, and water.
The three conditions necessary for a fire to occur are fuel, high temperature, and water.
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What should you do to the affected skin if chemicals splashed on it?
What should you do to the affected skin if chemicals splashed on it?
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To prevent spills, always hold the test tube at a _______ when pouring in the solution.
To prevent spills, always hold the test tube at a _______ when pouring in the solution.
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Keep the room well-______ to ensure safety during experiments.
Keep the room well-______ to ensure safety during experiments.
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Which item is NOT a part of the scientific drawing setup as per the skills mentioned?
Which item is NOT a part of the scientific drawing setup as per the skills mentioned?
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Which of the following is NOT one of the conditions for fire to occur?
Which of the following is NOT one of the conditions for fire to occur?
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Study Notes
Learning About Science
- Science is the study of natural phenomena and events
- Scientific knowledge is used to solve daily life problems
- Scientific knowledge is based on evidence collected through experiments
- Scientific knowledge can change based on new evidence
- Scientific knowledge has limitations, and there are still unanswered questions about the natural world
- Scientific discoveries have improved our understanding of the natural world and led to inventions that improve our quality of life (e.g., drugs to treat diseases, more effective use of natural resources, communication technology)
Practice of Science
- Scientific investigations follow steps: making observations, asking questions, proposing hypotheses, doing experiments, drawing conclusions
- Fair tests are crucial in investigations, where only one variable is changed while keeping others consistent
- Variables in a fair test include independent (changed), dependent (measured), and controlled (kept the same) variables
Safety in the Laboratory
- Laboratories are suitable places for experiments
- Proper equipment is essential for the safety of experiments (e.g., water tap & sink, gas tap, electrical socket, safety spectacles, gloves, laboratory coat, fire extinguisher, sand bucket, fire blanket, first aid box, eye wash bottle, fume cupboard)
- Safety rules are crucial to prevent accidents
- Do's and Don'ts should be followed carefully
- Hazard warning symbols should be respected
- Actions for emergencies (e.g., cuts, heat burns, chemical splashes)
- The three conditions for fire are fuel, high temperatures, oxygen (forming a fire triangle)
Laboratory Apparatus and Basic Practical Skills
- Common laboratory equipment and their functions (e.g., test tubes, boiling tubes, beakers, conical flasks, reagent bottles, Bunsen burner, insulating mat, wire gauze, tripod, test tube rack, test tube holder, test tube brush, glass rod, dropper, spatula, filter funnel, stand and clamp)
- Sectional diagrams of experimental set-ups, with labeled parts
- Skills for transferring solutions from reagent bottle to test tube
- Skills of transferring solution using dropper
- Skills for mixing solution
- Measuring units (e.g., kilometre, metre, centimetre, millimetre, cubic metre, cubic centimetre, litre, millilitre, kilogram, gram, milligram, degree Celsius, second, minute, hour)
- Instruments for measurement (e.g., measuring tape, meter rule, half-meter rule, plastic ruler, measuring cylinder, top pan balance, electronic balance, mercury thermometer, alcohol thermometer, stopwatch)
- Importance of reading scales correctly to avoid systematic errors
- 'Zero' function of electronic balance
- Different types of errors (loading time, reading errors, parallax errors, zero errors) and their sources
- Importance of accuracy and precision in measurements
- Structure of a Bunsen burner
- Differences between the Bunsen flames (air hole open vs closed)
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Description
This quiz covers key concepts about science, including the nature of scientific knowledge, its limitations, and the importance of evidence in scientific investigations. You will also learn about the steps involved in conducting fair tests and experiments. Test your understanding of these foundational scientific principles.
