This is a chapter 18-19 check up
Please be sure to enter your first and last name in the space above.

Answer each of the following questions. Please do this as
independently as possible. In other words keep your eyes on your
own computer screen. When done, "submit." Then, practice another
computer skill (such as typing, working with powerpoint, inserting
photos, paint, etc.)

• 1) A ________________ is a change of matter without a change in the
  chemical properties.
  

  physical change
  chemical change
• 2) A __________________ is a change that occurs when a substance
  changes its composition by forming one or more new substances.
  

  physical change
  chemical change
• 3) Splitting, cutting or pushing two things apart would be an example
  of a _________________________
  

  physical change
  chemical change
• 4) The amount of matter in an object compared to the amount of space it
  takes up is known as ___________________.
  Answer:
• 5) A piece of lead has a mass of 22 grams and a volume of 2 cubic
  centimeters. What is it's density?
  

  1
  10
  11
• 6) Aluminum has a density of 2.7; Gold has a density of 19.3. If a
  mystery object has a mass of 40 grams and a volume of 2 cubic
  centimeters, is it more likely to be made of gold or aluminum?
  

  gold
  aluminum
• 7) The mass of a baseball is an example of a ________________
  

  physical property
  chemical property
• 8) The Law of Conservation of _______________ states that particles of
  matter are not created or destroyed as the result of physical or
  chemical changes.
  Answer:
• 9) The three main particles of an atom are:
  

  protons, neutrons, electrons
  potions, netrinos, electrons
  protrons, neutons, elections
  protrons, nuetrons, electrons
• 10) Most of the elements on the periodic table are:
  

  solids
  liquids
  gases
  plasma
• 11) Valence electrons are found in the nucleus
  True   False
• 12) The atom is the basic unit of matter
  True   False
• 13) The atomic number is equal to the number of __________________.
  

  electrons in the nucleus
  protons in the nucleus
  protons in the nucleus and electrons in the cloud
  neutrons in the nucleus