7th grade ch. 1 sec. 1 describing matter
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7th grade ch. 1 sec. 1 describing matter

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7th grade ch. 1 sec. 1 describing matter 7th grade ch. 1 sec. 1 describing matter Presentation Transcript

  • Ch. 1 Sec. 1 Describing Matter
  • Describe 9 of the objects. Describing Matter Activity 2. Classify the objects into 3 categories. Object Description (color, texture, shape,etc.) Silver Round Flexible
  • matter anything that has mass & takes up space
  • chemistry study of properties of matter & how matter changes
  • substance Single kind of matter that is pure Has specific: makeup or composition set of properties ex: salt, sugar
  • 2 kinds of properties physical property chemical property can be observed w/out changing it into another substance new materials are formed examples: hardness texture color flexibility example: flammability ability to react
  • What are the frog’s physical properties? What are the frog’s chemical properties?
  • element Pure substance cannot be broken down into any other substances by chemical or physical means
  • ALL MATTER IS MADE OF ELEMENTS.
  • atom basic particle from which elements are made
  • Elements: One Kind of Atom [01:14]
  • chemical bond force of attraction between 2 atoms
  • molecule 2 or more atoms held by chemical bonds
  • Molecules: More Than One Kind of Atom [00:30]
  • ACTIVITY-MAKING MOLECULES H 2 O C O 2 C 2 H 4 C Cl 4 C 4 H 10 C H 3 C H 3 O H H C O 2 H Blue- Nitrogen- N Yellow- Hydrogen- H Black- Carbon- C Green- Chlorine- Cl Purple- Iodine- I Flourine- F Red- Oxygen- O Orange- Bromine- Br
  • compound Pure substance made of 2 or more elements chemically combined in a set ratio Represented by chemical formula- shows ratio of elements CO 2 H 2 O Compounds and their Proportions
  • mixture 2 or more substances that are mixed together but not chemically combined eg: cereal
  • solution well mixed mixture eg: sea water
  • heterogeneous mixture can see different parts
  • homogeneous mixture substances evenly mixed so you can’t see different parts ex: solution
  • Heterogeneous and Homogeneous Mixtures [01:16]
  • Activity- Separating a Mixture corn Chex wheat Chex Round pretzels Bread-sticks Bagel chips Window-pane pretzels
  • Classify each item as either an element (E) , a compound (C) , or a mixture (M) . You may also use your textbook and the periodic table to help you identify elements. water hydrogen soup soil diamond sugar sulfur iron brass sausage cement oxygen chop suey air iron sulfide mercury nitrogen salt bread gold aspirin
  • Classify each item as either an element (E) , a compound (C) , or a mixture (M) . You may also use your textbook and the periodic table to help you identify elements. water C hydrogen E soup M soil M diamond E sugar M sulfur E iron E brass C sausage M cement M oxygen E chop suey M air M iron sulfide C mercury E nitrogen E salt C bread M gold E aspirin C