SAINS PMR

PMR
Belajar Sains dengan perasaan ingin tahu

  • (SC) Form 1 (1)
  • (SC) Form 3 Compound (1)
  • (SC) Form 3 Electricity (1)
  • (SC) Form 3 Generations of Electricity (1)
  • (SC) Form 3 Structure Of Seed (1)
  • (SC)Form 1 (2)
  • (SC)Form 3 About Blood (1)
  • (SC)Form 3 Blood Circulation (1)
  • (SC)Form 3 Fuctions of the heart (1)
  • (SC)Form 3 Natural Fuel Resources (1)
  • (SC)Form 3 Vegetative Reproduction (1)
  • (SC)SPM MAGNET (1)

  • Chapter 1: Introduction to Sciences( Physical Quantities & SI Units)
    INTRODUCTION TO SCIENCE
    INTRODUCTION TO SCIENCE ( PHYSICAL QUANTITIES AND SI UNIT )
    INTRODUCTION TO SCIENCE ( SCIENTIFIC INVESTIGATION )
    INTRODUCTION TO SCIENCE
    Chapter 1: Introduction to Science (Measuring Tools)
    INTRODUCTION TO SCIENCE (MEASURING TOOLS)
    Chapter 1: Introduction to Science (Scientific Investigation) Mixed-up sentence exercise
    INTRODUCTION TO SCIENCE
    Chapter 2: Cell as a Unit of Life ( Cell Structures & Functions)
    CELL AS A UNIT OF LIFE
    CELL AS A UNIT OF LIFE ( CELL STRUCTURES AND FUNCTIONS )
    CELL AS A UNIT OF LIFE
    Chapter 2: Cell as a unit of Life ( Organs & Respective Systems)
    CELL AS A UNIT OF LIFE ( ORGANS AND RESPECTIVE SYSTEMS )
    CELL AS A UNIT OF LIFE
    MATTER
    MATTER
    MATTER
    THE VARIETY OF RESOURCES ON EARTH
    THE VARIETY OF RESOURCES ON EARTHv
    THE VARIETY OF RESOURCES ON EARTH
    THE VARIETY OF RESOURCES ON EARTH
    AIR POLLUTION
    THE AIR AROUND US
    THE AIR AROUND US
    THE AIR AROUND US
    THE AIR AROUND US
    Sources of energy
    Energy changes
    SOURCES OF ENERGY
    SOURCES OF ENERGY
    SOURCES OF ENERGY
    Effect of Heat on Matter
    HEAT
    HEAT
    HEAT

    DYNAMICS
    DYNAMICS 2
    DYNAMICS 3
    DYNAMICS 4
    DYNAMICS 5
    SUPPORT AND MOVEMENT
    SUPPORT AND MOVEMENT 2
    SUPPORT AND MOVEMENT 3
    SUPPORT AND MOVEMENT 4
    STABILITY
    STABILITY 2
    STABILITY 3
    SIMPLE MACHINE
    SIMPLE MACHINE 2
    SIMPLE MACHINE 3
    SIMPLE MACHINE 4

    Science Form 3 (Chapter 2) Blood Circulation and Transport

    Introduction to function of Heart

    The role of the heart is to pump oxygen-rich blood to every living cell in the body. In order to achieve its goal, it must continuously beat for a person’s entire lifespan. Because of its vital role, a non-beating heart always results in death. The human heart beats approximately 80,000 to 100,000 a day and pumps almost 2,000 gallons of blood. This means that in a person’s life lasting 70 to 90 years, the heart beats approximately two to three billion times and pumps 50 to 65 million gallons of blood. Because the heart is so essential for human sustenance, it is made up of a muscle different from skeletal muscle that allows it to constantly beat.

    In order for the heart to deliver oxygenated blood to all cells, blood is pumped through arteries. Veins bring deoxygenated blood cells to the lungs, which then are oxygenated, and then sent back to heart. In this way, a continuous cycle is formed of the heart pumping oxygenated blood and deoxygenated blood out to their designated destinations, and therefore the heart maintains the circulatory system.



    Systole: Stage when the ventricles of heart are contracting resulting in blood being pumped out to the lungs and the rest of the body.
    - Thick, muscular walls of both ventricles contract.
    - Pressure rises in both ventricles, causing the bicuspid and tricuspid valves to close. Therefore, blood is forced up the aorta and the pulmonary artery.
    - The atria relax during this time. The left atrium receives blood from the pulmonary vein, and the right atrium from the vena cava.



    Diastole: Stage when the ventricles of the heart are relaxed and not contracting. During this stage, the atria are filled with blood and pump blood into the ventricles.
    - Thick, muscular walls of both ventricles relax.
    - Pressure in both ventricles falls low enough for bicuspid valves to open.
    - The atria contract, and blood is forced into the ventricles, expanding them. The blood pressure in the aorta is decreased, therefore the semi-lunar valves close.











    Revision Form 3 : Menstrual Cycle


    Download questions & answers here or here


    Credit to all those JUs yang contribute soalan-soalan ni..Hopefully dapat jadi ilmu yang bermanfaat..TQ..

    Monday, March 12, 2012


    Q&A Form 3 : Chapter 3 (Structure of Kidney)

    Click on pictures to enlarge

    Q&A Form 3 : Chapter 3

    Click on the pictures to enlarge

    Q&A Form 3 : Chapter 2


    State two functions of the system in Diagram 3.
    Nyatakan  dua fungsi sistem di Rajah 3.

    1. P (phloem) : carry food

    2. Q (xylem) : carry water and mineral salts



    Q&A Form 3 : Chapter 1




    a) Name the process of the human breathing mechanism when the rubber sheet is pulled downwards.
        Namakan proses dalam mekanisme pernafasan manusia apabila kepingan getah ditarik ke bawah.
    Inhalation
                                                                                              

    b) Name the parts in the human respiratory system that is analogous to the apparatus below:
        Namakan bahagian dalam sistem respirasi manusia yang menyamai radas di atas:


    i)  glass tube - trachea
    ii) Y-shaped glass tube - bronchus
    iii) Balloon - lungs
    iv) Bell jar - thoracic cavity

    c) Name three diseases that affect human lungs.
        Namakan tiga penyakit yang memberi kesan kepada peparu manusia.

    i) lung cancer
    ii) bronchitis
    iii) asthma

    d) What are the harmful effect  to the respiratory system of the following harmful substances in the    
        cigarette smoke.
        Apakah kesan buruk terhadap sistem pernafasan manusia bagi bahan yang terdapat dalam asap
        rokok berikut:

         a)  Nicotine  : cause addiction
         b)  Tar          : blackens the lungs
         c) Carbon monoxide : reduce the amount of oxygen in blood




    Sains
    Sains Kertas 2


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  • Trial PMR 2011 Bahasa Arab





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