science

• Volume

  The amount of space that a substance or an object takes up
• Mass


  The amount of matter in a substance or an object
• Kilogram


  The basic SI unit for mass
• Cubic meter

  The basic SI unit for volume
• Solid

  • Tightly packed, usually in a regular pattern. They vibrate (jiggle) but generally do not move from place to place
• Liquid


  • Close together with no regular arrangement. They vibrate, move about, and slide past each other
• Gas


  • Well-separated with no regular arrangement. They vibrate and move freely at high speeds
• Matter


  The basic building blocks from which everything around us is built
• Protons


  Positively charged particles
• Neutrons

  No charge; found in the nucleus of an atom
• Electrons

  Negatively charged particles found outside the nucleus
• Atomic Mass


  The sum of the number of protons and neutrons in an atom
• Atomic Number


  It tells the number of electrons or protons present in an atom
• Find the atomic mass of Sulfur whose proton is 16 and the neutron is 31
• Compound

  It is formed when two atoms of different elements are chemically combined
• Elements


  The simplest type of a substance
• Dmitri Mendeleev


  • A Russian chemist who developed the periodic classification of the elements
• Types of elements


  • Metals
  • Non-metals
  • Metalloids
• Metalloids


  Elements that conduct heat and electricity moderately well and possess some properties of metals and some properties of nonmetals
• Methane


  Chemical formula: CH4
• Ammonia


  Chemical formula: NH3
• Sulfur dioxide


  Chemical formula: SO2
• Homogeneous


  It is made up of components that are uniformly distributed. Only one phase is visible.
• Heterogeneous


  A non-uniform mixture in which the components can be separated into parts. More than one phase of matter may be visible, you can distinguish the components.
• Types of mixtures


  • Solution
  • Suspension
  • Colloid
• Solution


  A homogeneous mixture where one substance is dissolved in another substance
• Suspension


  A heterogeneous mixture with particles big enough to be seen by the naked eye and are not evenly distributed
• Colloid


  Appear as a single phase and is usually milky or opaque in appearance
• Salad


  • Heterogeneous
• Brass


  • Homogeneous
• Air


  • Homogeneous
• Baby powder and water


  • Colloid
• Wine


  • Solution
• Aerosol


  • Colloid
• Alloys


  Mixture of two or more metals
• Solvent


  The substance that dissolves. It can be a solid, a liquid or a gas
• Solute


  The substance that is dissolved
• Bronze


  • Copper + Tin
• Brass


  • Copper + Zinc
• Steel


  • Iron + Carbon