Class 5 Unit-1 (Scientific Learning)

 

Unit-1

Scientific Learning

 Page No. 11

D. Differentiate between:

1.    Experiment and observation

• Experiment: A test done to discover something using tools and steps.
• Observation: Watching or noticing something carefully using our senses.

2.    Eye and microscope

• Eye: A natural sense organ to see things.
• Microscope: A tool that helps to see very small things that we can't see with our eyes.

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E. Very short answer type questions

1.    What is scientific learning?
→ Scientific learning is gaining knowledge through observation, inquiry, and experiments.

2.    Name the five sense organs of our body.
→ Eyes, ears, nose, tongue, and skin.

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F. Short answer type questions

1.    What is the importance of observation in scientific learning?
→ Observation helps to collect facts and understand things around us using our senses.

2.    What are the elements of scientific learning?
→ Observation, inquiry, classification, experiment, and conclusion.

3.    List any three properties of an object which can be known from observation.
→ Color, shape, and size.

4.    Does inquiry help in scientific learning process? Justify your argument with example.
→ Yes, inquiry helps us ask questions and find answers.
Example: Asking why plants need sunlight and learning through experiments.

5.    List any three properties which cannot be known by simple observation.
→ Boiling point, chemical composition, and exact weight.

6.    List any three properties of a substance which can be known by experiment but not by simple observation.
→ Acidity, temperature at which it melts, and whether it reacts with other chemicals.

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G. Long answer type questions

1.    Justify with your argument that modern laboratory is not required for scientific learning.
→ Scientific learning can start with simple observation and thinking. Even without a lab, we can learn by observing nature, asking questions, and trying small experiments at home or school. Many great scientists made discoveries without modern labs.

2.    Besides observation, there are some other elements of scientific learning. Mention them.
→ Other elements include:

o   Asking questions (inquiry)

o   Doing experiments

o   Classifying data

o   Drawing conclusions

3.    What is the fact or knowledge obtained from an experiment called?
→ It is called scientific evidence or experimental result.

 

 

 

 

 

Next Exercise

C. Differentiate between:

1.    Spring balance and digital balance

• Spring balance: Measures weight using a spring.
• Digital balance: Measures weight using electronic sensors and shows value on a screen.

2.    Traditional appliances and scientific instruments

• Traditional appliances: Old tools like mana and pathi used without modern technology.
• Scientific instruments: Modern tools like thermometer and balance used in labs for accurate results.

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D. Very short answer type questions

1.    Write the function of porcelain basin.
→ It is used to heat and evaporate liquids safely in the laboratory.

2.    Which instrument is used to cool substance?
→ Refrigerator or cooling chamber.

3.    What is schematic diagram?
→ A schematic diagram is a simple drawing that shows how parts of a circuit or system are connected using symbols.

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E. Short answer type questions

1.    Name any five scientific instruments available in your school laboratory.
→ Thermometer, microscope, Bunsen burner, digital balance, and measuring cylinder.

2.    What are the differences between actual diagram and schematic diagram?
→

• Actual diagram: Shows the real picture of the setup.
• Schematic diagram: Uses symbols to show how parts are connected.

3.    Write the methods for drawing the schematic diagram.
→

• Use correct symbols for each part.
• Connect them properly with lines.
• Label the parts.
• Keep it clean and simple.

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F. Long answer type question

1.    What do you mean by schematic diagram? Sketch a schematic diagram of an electric circuit.
→ A schematic diagram is a simple drawing using symbols to show how electrical parts are connected.
Here is a simple schematic diagram of an electric circuit:

 

 

 

 

 

 

Next Exercise

D. Very short answer type questions

1.    What are measurement and unit?
→ Measurement is finding the size, length, or amount of something.
→ Unit is the standard we use to measure, like meter, kilogram, or second.

2.    What are the common units of length, mass and time?
→

• Length: Meter (m)
• Mass: Kilogram (kg)
• Time: Second (s)

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E. Short answer type questions

1.    List any three tools to measure the length of an object.
→ Ruler, measuring tape, and meter scale.

2.    List any three tools to measure the mass of an object.
→ Beam balance, spring balance, and digital balance.

3.    The length of playground is 100 yard. Calculate length of the playground in meter.
→ 1 yard = 0.9144 meter
→ So, 100 yards = 100 × 0.9144 = 91.44 meters

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F. Long answer type question

1.    Write the method for the measurement of volume of irregular object.
→

• Take a measuring cylinder and fill it with water.
• Note the initial water level.
• Gently drop the irregular object into the cylinder.
• Note the new water level.
• Subtract the initial level from the new level.
• The difference gives the volume of the object in milliliters (ml) or cubic centimeters (cm³).

This is called the water displacement method.