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Matter and Chemical Reactions

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  • ________ reactions release energy to their surroundings. This makes the area around the reaction feel warm or hot.
    Exothermic
  • To make sure that all of the mass and the matter is conserved, chemical equations need to be
    balanced
  • Matter cannot be created nor destroyed, only transformed. This is the Law of
    Conservation of Mass/Matter
  • ____ is the energy that is transferred between two objects that are at different initial temperatures.
    Heat
  • A _________ _________ is when a substance is chemically changed into something else
    Chemical Reaction
  • In science, the ability to do work is known as
    energy
  • ________________ are groups of atoms that are chemically bonded together.
    Molecules
  • The part of the atom with no charge
    Neutron
  • ______________ is the study of matter, its’ properties and how it changes.
    Chemistry
  • A measurement of an object's thermal energy/heat is known as
    temperature
  • Cutting paper, crushing a can, melting ice or freezing water are examples of what kind of change?
    Physical change
  • Part of the atom with positive charge
    Proton
  • Burning a log, baking a cake, mixing together vinegar and baking soda are all examples of what kind of change?
    Chemical Change
  • ____________is the transfer of heat by the movement of a fluid (gas/liquid)
    Convection
  • True/False: Energy cannot be created nor destroyed, it only transforms from one type to another.
    True
  • When 2 atoms share their electrons with each other, they are known as
    covalent bonds
  • ______________ ____________ is the energy of motion.
    Kinetic energy
  • A ______ change in matter does not alter the chemicals in the subject.
    physical
  • Part of the atom with negative charge
    Electron
  • A ___________ change is where the item has undergone a chemical reaction and become a new substance.
    chemical
  • __________ is heat that travels through space.
    Radiation
  • Atoms in compounds are chemically _________ together.
    bonded
  • When one atom gives up its’ electron to another atom in a chemical reaction, this is known as an
    ionic bond
  • When energy is stored in chemical substances, it is ______ __________
    potential energy
  • ___________ is anything that takes up space and has mass.
    Matter
  • __________ are the chemicals being mixed together.
    Reactants
  • ______________ reactions absorb energy from their surroundings. This makes the area around the reaction feel cold.
    Endothermic
  • _____________ is the direct transfer of heat from one substance to another substance that it is touching.
    Conduction
  • The most basic unit of matter is the
    atom
  • Heat always goes from the ______ object to the ____ object.
    warmer; colder
  • _______ are the final result from the reactants mixing.
    Products
  • Unlike a molecule, a _______ contains 2 or more different kinds of atoms.
    compound
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