ROLL ASSIGNMENT 1028 Match the letter with its description

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ROLL ASSIGNMENT 10/28Match the letter with its
description

• __Mixture of a compound
• and an element
• ___Mixture of 2
• compounds
• ___Pure compound
• ____Mixture of 2 elements
• _____Pure element

Homework I will be grading your projects, make
sure you have a table tent with your names on
it! TEST TOMORROW!
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ROLL ASSIGNMENT 10/21

• Directions
• Please take out your Salt Water Race Lab and be
  ready for me to come around!
• 1. When two or more substances are combined so
  that each substance maintains its own properties,
  the result is what?
• 2. The scattering of light by colloids is
  called
• what?
• Which of the following is an example of a
• chemical change?
• The Tyndall effect Ice
  melting
• Rusting Dissolving salt

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ROLL ASSIGNMENT 10/20

• What is an example of a heterogeneous mixture?
• What is an example of a homogenous mixture?
• What is another name of a homogenous mixture?
• What is one way to separate a homogenous mixture?
• What is an example of a suspension?
• What is the LAW OF CONSERVATION OF MASS?

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• Teacher notes
• There are over 114 known elements they are
  listed in the periodic table, and they make up
  all matter in the universe rocks, stars, dust
  and living beings. Each element is made up of
  only one kind of atom, meaning that each atom has
  a specific number of protons.As mentioned,
  elements have to react chemically to form
  compounds. As atoms bond, energy is either
  released or absorbed. The reverse can also take
  place. When a compound decomposes, we often see
  its two components released, and if one of them
  is a gas, the leftover solid or liquid will weigh
  less than the original solid or liquid that
  decomposed

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Unit 3

• Properties of Matter Notes

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• Physical Properties
• Characteristics of a material that can be
  observed without changing the substance that make
  up the material
• A description of its appearance
• Examples color, hardness, boiling/freezing
  points, shape, density, texture, luster, mass,
  magnetic properties

Facts of Matter Clip/Start at 230
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• Physical Changes
• A change in physical properties but no change in
  the identity of the substance
• Changes in state (phase) of matter are physical
  changes
• Melting
• Freezing
• Evaporating
• Sublimations
• Condensing
• Examples rocks to sand, ice to water

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• Chemical Properties
• A characteristic of a substance that indicates
  whether it can undergo a certain chemical change
• A description of its behavior (ability to react
  with other materials)
• Example
• Reaction with acids
• Reaction with oxygen

Chemical Properties Clip
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• Chemical Changes
• A change of a substance into a different
  substance
• A new substance is formed with different physical
  and chemical properties
• Usually involves the addition or release of
  energy
• Example
• Chlorine greenish yellow, very poisonous gas
• Sodium soft, poisonous metal
• Chlorine Sodium sodium chloride (salt)

Chemical Changes Clip
Brainpop Property Changes
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• Law of Conservation of Mass
• The mass of all substances present before a
  chemical change equals the mass of all the
  substance remaining after the change
• Matter is neither created nor destroyed during a
  chemical change
• 2H2 O2 2H2O

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Balancing Formulas

• In order to balance formulas, one must make sure
  the same amount of atoms are on both sides of the
  equation.
• Example When Hydrogen and Nitrogen react
  together to produce ammonia gas See the board