Science 8

Subdecks (1)

Cards (169)

  • Newton's first laws of Motion
    Law of Inertia
  • Law of Inertia
    1. An object at rest will remain at rest unless acted on by an unbalanced force
    2. An object in motion continues to move with the same velocity unless acted by an unbalanced force
  • Inertia
    An inherent property of an object to resist change
  • Inertia
    • It is independent of external force and it is mass dependent
  • Massive objects

    Greater Inertia
  • Smaller objects
    Lesser Inertia
  • External forces
    • Normal force
    • Gravitational force
  • This behaviour of how a body changes in motion can be demonstrated by Newton's Law of Inertia
  • Newton's first law of motion
    An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues to move with the same velocity unless acted on by an unbalanced force.
  • Inertia
    An inherent property of an object to resist change in motion. It is independent of external force and is mass dependent.
  • Motion types
    • Greater inertia
    • Smaller inertia
    • Triangle
    • Minimal force
  • External forces
    Gravitational force
  • An object at rest will remain at rest AND an object in motion will remain in motion unless acted on by unbalanced forces
  • Newton's law of inertia
    Demonstrates how a body changes in motion
  • Newton's second law of motion
    The acceleration of an object is directly proportional to the net force on it and inversely proportional to its mass
  • Mass
    The amount of force that would give a small mass an acceleration of 1 m/s²
  • Weight is the force due to gravity
  • A net force of 15 N is applied on an encyclopedia
    It accelerates at a rate of 5 m/s
  • Newton's third law of motion (law of interaction)
    For every action, there is an equal and opposite reaction
  • Examples of Newton's third law
    • Bird flying (wings push air down, air pushes bird up)
    • Dribbling a ball (hand applies force to ball, ground applies equal force upwards)
  • Newton's third law applies regardless of friction or air resistance
  • Work
    The change in energy done by an object. Work is done when a force is applied to an object causing it to move in the direction of the force.
  • The unit of work is the Joule, named after the English physicist James Prescott Joule
  • Cell
    Smallest unit of all living organisms
  • Cell origin

    Comes from pre-existing cells
  • Parts of a cell
    • Cytoplasm
    • Cell membrane
    • Nucleus
  • Animal cells

    • Circular
  • Plant cells
    • Rectangular
  • Parts of the cell
    • Ribosomes
    • Cell membrane
    • Cytoplasm
    • DNA
    • Nucleus
    • Nucleolus
    • Nuclear membrane
    • Lysosome
    • Centriole
    • Mitochondrion
    • Endoplasmic reticulum
    • Vacuole
    • Chloroplast
    • Cell wall
    • Chromosomes
    • Golgi apparatus
  • Cell division
    Biological process for the creation of daughter cells from parent cells
  • Cell cycle
    Series of events that takes place in a cell as it grows and divides
  • Mitosis
    Type of cell division that occurs in all other cells in the body
  • Meiosis
    Type of cell division that occurs in the egg cells and sperm cells (sex cells)
  • Karyokinesis
    Division of cell nucleus during mitosis
  • Cytokinesis
    Division of cytoplasm at the end of mitosis or meiosis
  • Phases of the cell cycle
    • Interphase
    • G1
    • S Phase
    • G2 Phase
  • Mitosis
    1. Prophase
    2. Metaphase
    3. Anaphase
    4. Telophase
  • Meiosis Phase I
    1. Prophase I
    2. Metaphase I
    3. Anaphase I
    4. Telophase I
  • Meiosis Phase II
    1. Prophase II
    2. Metaphase II
    3. Anaphase II
    4. Telophase II
  • Parts of the chloroplast
    • Lumen
    • Stroma
    • Lamellae
    • Thylakoid
    • Grana/Granum
    • Outer membrane
    • Inner membrane
    • Intermembrane