2. 1 st Word2 nd Word3 rd Word Use your word cards make 5 compound words

3. 1 st Word2 nd Word3 rd Word HamStringHamstring QuarterBackQuarterback CrossBowCrossbow HoneyMoonHoneymoon CartWheelCartwheel  Compound words are two separate words with two separate meanings combined to form a new word.  Compounds in science are similar.  There are millions and millions of compounds.

4.  A compound is a pure substance composed of two or more elements chemically combined in a specific proportion.

5.  When elements combine to form a compound we say they have made a chemical reaction.  The elements in a compound can lose their properties and take on new properties.

6. Na-Sodium and Cl-Chlorine (a deadly gas) combine to form the compound NaCl which makes table salt. H-Hydrogen (gas) and O- Oxygen (gas) combine to form water (liquid)

7. Identify these cards as either elements (E) or compounds (C)

9.  A formula tells you how many atoms of each element are in the compound and what elements are in the compound.  For example, CO ₂ Carbon Dioxide has 1 atom of the element Carbon (C) and 2 atoms of the element Oxygen (O)  A compound will always have two or more capital letters in the formula.  Elements only have one capital letter