Physical Science

Subdecks (1)

Cards (70)

  • Hydrogen is converted into helium

    1. In the stellar nebulae/ sun core
    2. By nuclear fusion
  • Big bang theory
    Also known as primordial nucleosynthesis
  • Big bang theory produced light elements such as Hydrogen and Helium, and very few elements heavier than lithium
  • Stellar Nucleosynthesis
    The creation (nucleosynthesis) of chemical elements by nuclear fusion reaction within stars
  • Stellar Nucleosynthesis
    • Requires high temperature
    • Requires high pressure
    • Nuclear fusion takes place
  • Each element has a unique number of protons
  • Nuclear reaction
    1. Protons in the nuclei of elements are combined
    2. Creating new elements
  • Synthetic elements
    Created in laboratories through particle accelerators, where in target materials bombarded by high-speed particles to create new elements
  • London dispersion ills and individuals sports
  • Dipole-dipole attraction

    An intermolecular force that exists only in polar molecules
  • Hydrogen bond
    A type of intermolecular force that exists when hydrogen is paired with F, O, or N, as found in DNA
  • Hydrogen bonding
    A special kind of dipole-dipole interaction that occurs specifically between a hydrogen atom bonded to an oxygen, nitrogen, or fluorine atom
  • Substances with strong intermolecular forces
    Have high boiling point, melting point, viscosity and surface tension
  • Collision theory

    States that for a chemical reaction to occur, the reacting particles must collide with one another with enough energy and proper orientation
  • Increasing temperature, concentration, surface area and pressure
    Generally increase the rate of chemical reaction
  • Fossil fuel is the most heavily used source of energy in the Philippines
  • Geothermal energy
    The form of energy generated by natural processes within the earth, such as hot rocks, magma, geysers, and hot springs
  • Renewable sources

    Are continuously replenished and do not deplete over time
  • Non-renewable sources

    Are finite and deplete as they are consumed
  • Potential greenhouse gas emissions are a crucial factor for evaluating the sustainability of energy sources
  • Stoichiometry
    1. Determine formula mass
    2. Convert given quantity to moles
    3. Use stoichiometry ratios
    4. Calculate theoretical yield
    5. Calculate percent yield
  • Laboratory synthesis of new elements is artificial synthesis of elements that requires advanced particle accelerators and target materials
  • High temperature and high pressure are the necessary conditions for nuclear fusion to take place
  • Biodegradability and environmental certification are the criteria used in assessing cleaning products
  • Greenhouse gas emissions during energy production are the factor that is most crucial for evaluating the sustainability of a particular energy
  • Renewable energy
    Energy that is not depleted when used
  • Fossil fuel is the source of energy that is most heavily used in the Philippines
  • Finely powdered reactants
    Exhibit faster reaction rates due to increased surface area
  • Reactions can happen if the colliding particles have enough energy
  • Saturated fats

    • Butter, eggs, coconut oils, palm oils