Science Class 10: Key Concepts
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Questions and Answers

The oil is produced from the seeds of -

  • Chillies
  • Mustard (correct)
  • Mango
  • Peas

    • Which parts of the plant can be edible?

  • Stem
  • All of these (correct)
  • Fruit
  • Root

    • A balanced diet is a good source of -

  • Water
  • None
  • Oxygen
  • Nutrient (correct)

    • Which one is a correct match?

    <p>Iodine - Goitre</p> Signup and view all the answers

    Which of the following is not synthetic fibres?

    <p>Wool</p> Signup and view all the answers

    Which of the following materials is in the liquid form and has a lustre?

    <p>Mercury</p> Signup and view all the answers

    Water can be separated from salt through-

    <p>Evaporation</p> Signup and view all the answers

    Melting of ice is a-

    <p>Physical change</p> Signup and view all the answers

    In an exothermic reaction-

    <p>Heat is involved</p> Signup and view all the answers

    Ten millimetres is equal to-

    <p>1cm</p> Signup and view all the answers

    When the motion of the object is not along a fixed path with changing direction-

    <p>Random motion</p> Signup and view all the answers

    Standard unit (SI) of length is -

    <p>Meter</p> Signup and view all the answers

    Light travels in ______ lines.

    <p>Straight</p> Signup and view all the answers

    Which plant is known as the morning and evening star?

    <p>Venus</p> Signup and view all the answers

    ______ is the famous scientist who discovered penicillin in 1928

    <p>Sir Alexander Fleming</p> Signup and view all the answers

    ______ is considered the father of Indian Nuclear Program.

    <p>Homi J. Bhabha</p> Signup and view all the answers

    ______ is the inventor of the radio.

    <p>Guglielmo Marconi</p> Signup and view all the answers

    The biggest known volcano in our solar system is located on-

    <p>Mars</p> Signup and view all the answers

    Rain water harvesting is a method employed to:

    <p>Raise the water level</p> Signup and view all the answers

    The process by which water from the surface of the earth moves to the atmosphere is -

    <p>Evaporation</p> Signup and view all the answers

    The method of preparing compost with the help of redworms is called -

    <p>Vermicomposting</p> Signup and view all the answers

    Which one of the following cannot be recycled?

    <p>None</p> Signup and view all the answers

    Water forms about ______% of our body.

    <p>70</p> Signup and view all the answers

    Which is not a magnetic material?

    <p>Copper</p> Signup and view all the answers

    What are the characteristics of water insoluble substances?

    <p>They do not dissolve in water.</p> Signup and view all the answers

    One of the tributaries of river Indus is the-

    <p>Ravi</p> Signup and view all the answers

    Tools of early man were made of -

    <p>Stone</p> Signup and view all the answers

    Neolithic man lived -

    <p>Small communities villages</p> Signup and view all the answers

    The Indus People were worshippers of -

    <p>Mother Goddess</p> Signup and view all the answers

    Study Notes

    Plant Parts

    • Stems, roots, and fruits can be edible.

    Oil Production

    • Mustard seeds are used to produce oil.

    Balanced Diet

    • A balanced diet is a good source of nutrients.

    Deficiency Diseases

    • Iron deficiency leads to anemia.
    • Vitamin A deficiency causes night blindness.
    • Iodine deficiency results in goitre.

    Synthetic Fibers

    • Wool is a natural fiber, not a synthetic fiber.

    Liquid with Lustre

    • Mercury is the only liquid metal. It has a shiny, metallic luster.

    Water Separation

    • Distillation can be used to separate water from salt.

    Physical Change

    • Melting of ice is a physical change.

    Exothermic Reactions

    • In an exothermic reaction, heat is released.

    Measurements

    • 10 millimeters (mm) equals 1 centimeter (cm).

    Motion

    • Random motion is characterized by changes in direction and an unfixed path.

    Standard Unit of Length

    • The standard unit of length is the meter.

    Light Travel

    • Light travels in straight lines.

    Venus

    • Venus is known as the morning and evening star.

    Penicillin Discovery

    • Sir Alexander Fleming discovered penicillin in 1928.

    Indian Nuclear Program

    • Homi J. Bhabha is considered the father of the Indian Nuclear Program.

    Radio Invention

    • Guglielmo Marconi is credited with inventing the radio.

    Largest Volcano

    • The largest volcano in our solar system is located on Mars.

    Rain Water Harvesting

    • Rainwater harvesting aims to decrease floods and droughts by collecting rainwater.

    Water Evaporation

    • The process of water moving from the surface of the earth to the atmosphere is called evaporation.

    Vermicomposting

    • Vermicomposting uses redworms to create compost.

    Recycling

    • Rubber tires cannot be recycled.

    Human Body Composition

    • Water makes up approximately 70% of the human body.

    Magnetic Materials

    • Copper is not a magnetic material. Iron, nickel, and cobalt are magnetic materials.

    Water Insoluble Substances

    • Water-insoluble substances do not dissolve in water. They often settle down at the bottom or float on the surface of water.

    Indus River Tributary

    • The Ravi River is a tributary of the Indus River.

    Early Man Tools

    • Tools of early humans were made of stone.

    Neolithic Man Lifestyle

    • Neolithic people lived in small, communal villages.

    Indus Civilization Worship

    • The Indus civilization worshipped a Mother Goddess.

    Vedic Period and Aryan Civilization

    • The Vedic period is associated with the Aryan civilization.
    • The Aryans developed a social structure based on four classes: Brahmanas, Kshatriyas, Vaishyas, and Shudras.
    • The Vedas, ancient sacred texts, contain hymns, prayers, and rituals.
    • The four Vedas are: Rig Veda, Sama Veda, Yajur Veda, and Atharva Veda.

    Indus Valley Civilization

    • The Indus Valley civilization is known for its advanced urban planning, with well-planned cities and sophisticated drainage systems.
    • The Indus people were skilled craftspeople who developed advanced pottery and seals with unique script.
    • The Indus Valley Civilization was known for the production of cotton textiles, which is why they have been referred to as “the cotton people”.
    • The famous cities of the Indus Valley Civilization are Mohenjo-daro and Harappa.
    • The Indus people practiced agriculture and livestock rearing.

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    Description

    Explore essential topics from your 10th-grade science curriculum, including plant parts, oil production, balanced diets, and deficiency diseases. Understand physical changes, exothermic reactions, and the standard units of measurement. This quiz is designed to reinforce your knowledge of these fundamental concepts.

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