Science term 2 grade 8

• 1\. Materials, their structure and changes to material
  • 1.1. Atomic structure
    • 1.1.1. Please be reminded that the proton is positive charge and will always be in the middle with the neutron which dont have a charge and surround by the electron which have negative charge
  • 1.2. Chromatography
    • 1.2.1. Used to divide color to see how many colors are there inside a color
  • 1.3. Density
    • 1.3.1. Density is the measure of a substance's mass per unit of volume
  • 1.4. Endothermic and exothermic
    • 1.4.1. Definitions
      • 1.4.1.1. Endothermic Process
        • 1.4.1.1.1. Absorb heat from surronding make the surrounding cold
      • 1.4.1.2. Exothermic Process
        • 1.4.1.2.1. Release heat to surrounding make the surrounding hot
    • 1.4.2. Examples
      • 1.4.2.1. Endothermic Reactions
        • 1.4.2.1.1. Ice pack
      • 1.4.2.2. Exothermic Reactions
        • 1.4.2.2.1. making campfire
  • 1.5. Solubility
    • 1.5.1. Solubility is the maximum amount of a substance (solute) that can dissolve in a given amount of another substance (solvent) to form a new product
  • 1.6. Collision theory
    • 1.6.1. Collision theory states that for a chemical reaction to occur reactant particles must physically collide with both proper spatial orientation and sufficient kinetic energy to overcome the activation energy barrier.
• 2\. Forces and energy
  • 2.1. Balance and unbalanced force and motion
    • 2.1.1. Newton's Laws of Motion
      • 2.1.1.1. Inertia
      • 2.1.1.2. F=ma
    • 2.1.2. Types of Forces
      • 2.1.2.1. Friction
      • 2.1.2.2. Gravity
      • 2.1.2.3. Normal
    • 2.1.3. Calculating Net Force
      • 2.1.3.1.
    • 2.1.4. Effects on Motion
  • 2.2. Pressure
    • 2.2.1. Calculation
    • 2.2.2
  • 2.3. Heat transfer
• 3\. Light and sound
  • 3.1. Sound wave
  • 3.2. Reflection and refraction
• 4\. Electricity and magnetism
• 5\. Planet earth
  • 5.1. Climate, Renewable and non renewable energy
  • 5.2. Asteroid