Lead Iodide experiment

A solutions of lead (II) nitrate is dropped into a solution of potassium iodide, forming a brilliant yellow lead iodide precipitate.

Physical or Chemical Changes

Physical & chemical changes from butch2bn

Chemical Reaction Quiz

2. Marco 

The student is able to distinguish between physical change and chemical reaction           1.Marco tears a piece of notebook paper into smaller pieces, tearing paper into pieces  pieces is an example of what kind of change?              2. Which process is an example of a physical change?           A. burning B. rusting .  C.flattening 3. Chemical changes result in new substances, but physical changes do not. Which process is an example of a chemical change? A. baking a cake B. chopping a tree  C. heating a cup of tea 4. Which observation is a sign of a chemical change? A. A rotting potato gives off a bad smell. B. A melting block of ice leaves a large puddle. C. A cloud changes shape when blown by wind. D. A plaster statue breaks when it falls onto the floor.                      5. There are several differences between chemical and physical changes. Which process is an example of a chemical change? A. steam rising from a boiling pot of soup B. a metal railing rusting in damp weather C. alcohol evaporating from a cotton swab D. a piece of wood shrinking as it dries out

Physical and Chemical Changes

How to clean fossils with vinegar