Chemistry Review

Examine the Experiment:

1. Grind sugar into a powder.

 2. Heat a graduated cylindar of liquid.

 3. Completely dissolve the sugar in the liquid

 4. Add compound gelatin solution to form a solid.

During which step of this procedure does a chemical change occur?

• Step 2
• Step 4
• Step 1
• Step 3

Examine the Experiment:

1. Grind sugar into a powder.

2.  2. Mix solutions that form a solid.
   
    3. Heat a graduated cylinder of liquid.
   
    4. Completely dissolve the sugar in the liquid
   
   

During which step of this procedure does a chemical change occur?

• Step 2
• Step 4
• Step 1
• Step 3

Examine the Experiment:

2.  1. Place new solution to form a solid.

2. Grind sugar into a powder.

 3. Heat a graduated cylinder of liquid.

 4. Completely dissolve the sugar in the liquid

During which step of this procedure does a chemical change occur?

• Step 2
• Step 4
• Step 1
• Step 3

Examine the Experiment:

1. Grind sugar into a powder.

2.  2. Add mystery solution to form a solid.
   
    3. Heat a graduated cylinder of liquid.
   
    4. Completely dissolve the sugar in the liquid
   
   

During which step of this procedure does a chemical change occur?

• Step 2
• Step 4
• Step 1
• Step 3

Han Solo was doing repairs on his Millennium Falcon spaceship.

He had Chewbaca write down all damage to his ship. Which thing that he wrote was a chemical change?

• Iron screw rusting

• Metal wing broken

• Stirring wheel polished

• Windshield wiper melted

Mrs. McElroy mixing 2 chemicals. Which shows that her chemicals reacted chemically?

• The chemicals remain in separate layers
• No visible change in appearance
• A gas is produced

• The mixture is a liquid

Mrs. McElroy is mixing 2 chemicals. Which shows that her chemicals reacted chemically?

• The chemicals remain in separate layers
• No visible change in appearance
• Solution gets hot

• The mixture is a liquid

A student performs an experiment and writes down these observations:

 

Solution increases in temperature.

Bubbles form. 

Color changes.

____________________________________________________________________________________________

Which is evidence of a chemical change?

• All of the above

• None of the above

• Only color change

• Only bubbles forming

A student performs an experiment and writes down these observations:

 

Solution increases in temperature.

Substance dissolves. 

Water freezes.

____________________________________________________________________________________________

Which is evidence of a chemical change?

• Solution increases in temperature

• None of the above

• Water freezes

• Dissolves

A color change in RUST is evidence of a _____ change

• biological
• physical
• chemical
• mechanical