Class 8 Science Chapter 1 Quiz
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Questions and Answers

Which of the following is a non-metallic element essential for living organisms?

  • Iron
  • Nitrogen
  • Oxygen (correct)
  • Calcium

What is the process of conversion of water into its vapor called?

  • Evaporation (correct)
  • Condensation
  • Precipitation
  • Sublimation

What is the unit of measurement for electric current?

  • Amperes (correct)
  • Ohms
  • Watts
  • Volts

What is the primary purpose of crop rotation in agriculture?

<p>To improve soil fertility and structure (D)</p> Signup and view all the answers

Why is it important to remove weeds from the crop fields?

<p>Weeds compete with crops for nutrients, water, and sunlight (B)</p> Signup and view all the answers

Which of the following is an example of organic manure?

<p>Compost (A)</p> Signup and view all the answers

Flashcards

Oxygen's role in life

A non-metallic element crucial for respiration and many biological processes in living organisms.

Evaporation

The phase transition of water from liquid to gas, driven by heat.

Ampere (Amp)

The SI unit that measures the rate of electric charge flow.

Crop rotation

A farming technique that aids in replenishing soil nutrients and preventing depletion

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Why remove weeds?

To eliminate competition for vital resources needed by crops.

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Compost

Decomposed organic matter used to enrich soil and provide nutrients.

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Study Notes

Essential Elements

  • Oxygen is a non-metallic element essential for living organisms.

Water Cycle

  • Evaporation is the process of conversion of water into its vapor.

Electricity

  • Ampere (A) is the unit of measurement for electric current.

Crop Rotation

  • The primary purpose of crop rotation in agriculture is to maintain soil fertility and reduce pests and diseases.

Weed Management

  • Removing weeds from crop fields is important to prevent competition for water, nutrients, and light, and to reduce the risk of pests and diseases.

Organic Manure

  • Compost is an example of organic manure.

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Description

Test your knowledge of science with this quiz on Class 8 science chapter 1. Explore questions on electric current measurement units, essential non-metallic elements for living organisms, and the process of water turning into vapor. Challenge yourself and expand your understanding of these fundamental scientific concepts.

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