Science Electric Circuits and Magnetism Quiz
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Questions and Answers

What are the primary reasons that might cause a bulb not to glow?

  • The power supply is not connected to the socket. (correct)
  • The bulb is only connected to a series of resistors.
  • There is a break in the electrical circuit. (correct)
  • The bulb is made of glass without any electrical components.
  • How many poles does a magnet contain, and what are they called?

  • One pole - the North pole.
  • Two poles - the North and South poles. (correct)
  • Three poles - the North, South, and West poles.
  • Four poles - the North, South, East, and West poles.
  • What is one of the symptoms of scurvy, which results from a deficiency?

  • Increased hair loss.
  • Bleeding gums and weakness. (correct)
  • High blood pressure.
  • Severe headaches and migraines.
  • Why do electricians wear rubber gloves when working on electric switches?

    <p>To prevent electric shock. (A)</p> Signup and view all the answers

    Which of the following food materials is considered a good source of calcium?

    <p>Dairy products and fish. (A)</p> Signup and view all the answers

    Which of the following is a symptom of scurvy?

    <p>Bleeding gums (C)</p> Signup and view all the answers

    Which of the following is an example of a conductor?

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

    What is the main reason a bulb might not glow?

    <p>All of the above (D)</p> Signup and view all the answers

    How does a magnet lose its magnetic property?

    <p>All of the above (D)</p> Signup and view all the answers

    Why does an electrician use rubber gloves while repairing an electric switch?

    <p>To insulate themselves from electric shock (D)</p> Signup and view all the answers

    What is the term used to describe a combination of one or more cells in an electrical context?

    <p>Circuit (B)</p> Signup and view all the answers

    Which group of materials is not classified as an insulator?

    <p>Sewing needle, pin, coin (D)</p> Signup and view all the answers

    What occurs when both terminals of a cell are connected through a wire?

    <p>Efficiency of cell increases (D)</p> Signup and view all the answers

    If a bar magnet is cut into two pieces, what happens to the magnetic poles of each piece?

    <p>Both pieces will have two new poles, one north and one south. (A)</p> Signup and view all the answers

    What components are essential within a seed for a new plant to grow?

    <p>Embryo, energy storage, protective coat (C)</p> Signup and view all the answers

    Which of the following is a way to keep a magnet safe from damage?

    <p>Storing it in a cool, dry place away from other magnets. (A)</p> Signup and view all the answers

    Which of the following is most likely to provide direct electrical connection in a circuit?

    <p>Conductor (D)</p> Signup and view all the answers

    Which of the following is NOT a correct pairing based on the information provided?

    <p>Copper sulphate solution - Blue black colour with tincture iodine (B)</p> Signup and view all the answers

    What type of energy conversion is NOT mentioned as occurring in an electric cell?

    <p>Chemical energy to mechanical energy (D)</p> Signup and view all the answers

    Which method is NOT recommended for preparing bean seeds for germination?

    <p>Leave them on a dry window (A), Plant them upside down (C)</p> Signup and view all the answers

    What is the process through which new plants arise from seeds?

    <p>Germination (B)</p> Signup and view all the answers

    Which part of the plant is responsible for seed formation?

    <p>Flower (C)</p> Signup and view all the answers

    How can seeds disperse from their parent plant?

    <p>Through wind or animal interactions (B)</p> Signup and view all the answers

    What is a disadvantage of burying bean seeds too deep in the soil?

    <p>It prevents sunlight from reaching the seeds (C)</p> Signup and view all the answers

    What is the primary function of the seed coat?

    <p>To protect the seed from environmental damage (B), To aid in the dispersal of the seed (D)</p> Signup and view all the answers

    Which of these options best describes the role of sunlight in seed germination?

    <p>Sunlight provides energy for the embryo to grow (C)</p> Signup and view all the answers

    Why would a seed with a smooth, round shape be less likely to disperse by wind than a seed with a feathery appendage?

    <p>A smooth, round seed would not experience as much drag from the wind, limiting its ability to fly (C)</p> Signup and view all the answers

    Consider a seed with a sticky outer coat. What is the most likely dispersal method for this seed?

    <p>Animal dispersal (B)</p> Signup and view all the answers

    Why is a seed with a juicy, fleshy fruit more likely to be dispersed by animals than by wind?

    <p>The fruit provides sustenance to animals, which then disperse the seed (A), The fleshy fruit makes the seed more attractive to animals, leading to dispersal (C)</p> Signup and view all the answers

    Flashcards

    Deficiency diseases

    Health issues caused by lack of essential nutrients.

    Functions of water in the body

    Water helps in digestion, temperature regulation, and nutrient transport.

    What is a conductor?

    Materials that allow electricity or heat to flow easily.

    Deficiency disease from calcium

    The disease caused by calcium deficiency is osteoporosis (bone weakening).

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    Uses of rubber gloves by electricians

    Rubber insulates against electrical shocks, protecting the electrician.

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    Circuit

    A combination of one or more cells connected together.

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    Insulators

    Materials that do not conduct electricity well.

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    Examples of Insulators

    Cork, rubber, and wood are common insulators.

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    Connecting Cell Terminals

    Connecting both terminals of a cell increases its efficiency.

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    Seed Structure

    Seeds contain an embryo, energy storage, and a protective coat.

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    Symptoms of Scurvy

    Scurvy symptoms include fatigue and swollen gums due to vitamin C deficiency.

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    Reasons a bulb won't glow

    A bulb may not glow due to a broken filament or loose connections.

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    Poles of a magnet

    A magnet has two poles: North and South.

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    Roughage

    Roughage is dietary fiber important for digestion, found in fruits and vegetables.

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    Magnetic compass usage

    A magnetic compass uses Earth's magnetic field to indicate direction, pointing North.

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    Ways to keep a magnet safe

    Keep magnets away from heat, avoid dropping, and store in a cool, dry place.

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    Poles after cutting a bar magnet

    When a bar magnet is cut, each piece retains both a north and a south pole.

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    Copper sulphate solution

    Indicates the presence of starch by showing a blue-black color with iodine.

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    Energy conversion in an electric cell

    In an electric cell, chemical energy is converted to electrical energy.

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    Deficiency caused by excess fat

    Eating too much fat-rich food can lead to obesity.

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    Seed coat

    The hard outer shell of a seed that protects it.

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    Germination requirements

    Seeds need sunlight, water, and air to germinate.

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    Wind dispersal feature

    A feathery appendage that aids in seed dispersal by wind.

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    Smooth seed shape

    A smooth, round shape does not help in wind dispersal.

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    Sticky seed outer coat

    A sticky outer coat aids in attachment, not wind dispersal.

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    Preparation for Germination

    Soaking bean seeds in water overnight helps to hydrate them for germination.

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    Seed Formation

    Seeds are formed in the flower of the plant.

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    Seed Dispersal Methods

    Seeds can fly, stick to animals, or be carried by humans for dispersal.

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    Germination

    New plants arise by the process of seeds germinating, which involves sprouting.

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    Roots and Movement

    Plants cannot move, but their seeds can travel long distances.

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