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Energy

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Definition of Work

Subtopic

Definition of Work under Energy for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When a ball is thrown upwards, work done by gravity while the ball goes up is ______.

    A.

    Positive

    B.

    Negative

    C.

    Zero

    D.

    Infinite

  2. 2.

    Which of the following is NOT required to define work scientifically?

    A.

    Force

    B.

    Displacement

    C.

    Direction of force

    D.

    The time taken to move

  3. 3.

    If you push a block with 12 N12\text{ N} and it moves 3 m3\text{ m}, how much energy is spent as work?

    A.

    4 J4\text{ J}

    B.

    36 J36\text{ J}

    C.

    15 J15\text{ J}

    D.

    9 J9\text{ J}

Download the worksheet for Energy - Definition of Work to practice offline. It includes additional chapter-level practice questions.

Units of Work and Energy

Subtopic

Units of Work and Energy under Energy for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is equivalent to 41864186 Joules?

    A.

    1 Calorie

    B.

    1 Kilocalorie

    C.

    1 Erg

    D.

    1 Megajoule

  2. 2.

    If an experiment results in 7,000,0007,000,000 ergs of work, how many Joules is that?

    A.

    0.7 Joules

    B.

    7 Joules

    C.

    70 Joules

    D.

    0.07 Joules

  3. 3.

    What is the result of 1 Newton×1 meter1 \text{ Newton} \times 1 \text{ meter}?

    A.

    1 Joule

    B.

    1 Erg

    C.

    1 Watt

    D.

    1 Pascal

Download the worksheet for Energy - Units of Work and Energy to practice offline. It includes additional chapter-level practice questions.

Mechanical Energy (Kinetic and Potential)

Subtopic

Mechanical Energy (Kinetic and Potential) under Energy for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the name for energy stored in an object due to its configuration or shape?

    A.

    Kinetic Energy

    B.

    Elastic Potential Energy

    C.

    Gravitational Potential Energy

    D.

    Light Energy

  2. 2.

    As a roller coaster descends from a high peak, its Potential Energy:

    A.

    Increases

    B.

    Decreases

    C.

    Remains constant

    D.

    Changes to Nuclear Energy

  3. 3.

    If two balls, one weighing 5kg and one weighing 10kg, are placed on the same shelf, which one has more Potential Energy?

    A.

    The 5kg ball

    B.

    The 10kg ball

    C.

    They have equal energy

    D.

    Neither has energy

Download the worksheet for Energy - Mechanical Energy (Kinetic and Potential) to practice offline. It includes additional chapter-level practice questions.

Law of Conservation of Energy

Subtopic

Law of Conservation of Energy under Energy for Grade 7 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When a person climbs up a ladder, they are using chemical energy from food to gain ________ energy.

    A.

    Kinetic

    B.

    Potential

    C.

    Light

    D.

    Nuclear

  2. 2.

    A guitar string being plucked converts mechanical energy into ________ energy.

    A.

    Sound

    B.

    Chemical

    C.

    Electrical

    D.

    Magnetic

  3. 3.

    If we say a machine is 100% efficient, it means it obeys the Law of Conservation of Energy and:

    A.

    Creates extra energy

    B.

    Destroys useless energy

    C.

    Converts all input energy into useful work without loss

    D.

    Does not require any energy

Download the worksheet for Energy - Law of Conservation of Energy to practice offline. It includes additional chapter-level practice questions.

Energy - ICSE Class 7 Science Notes & Revision | Krit.club