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- 1. Multiple Choice
A green powder is heated & a gas is given off while it turns to a black solid. This describes
Physical Change
Chemical Change
Change in State
Change in Temperature
- 2. Multiple Choice
A Chemical Change is also known as what?
Physical Change
Physical Property
Chemical Reaction
Chemical Property
- 3. Multiple Choice
Which of the following could indicate that a chemical change took place?
Change in color
Production of Energy
Formation of Gas
All are correct
- 4. Multiple Choice
The formation of a solid when two liquids combine is called?
Solidification
Freezing
Precipitate
Solubility
- 5. Multiple Choice
The difference between a Physical change and a Chemical change is…
Physical change is only a change to the outside appearance.
Chemical change is when matter is changed into something new.
Atoms are rearranged in chemical changes & not in physical.
All are correct.
- 6. Multiple Choice
What does a chemical change result in?
A change in state of the substance (ex. liquid to solid)
A change in texture of the substance.
A change in the way atoms are bonded to each other.
A change in the appearance of the substance.
- 7. Multiple Choice
Which type of change is most often easily reversed?
Chemical
Physical
Both a physical and chemical change.
Neither a physical or chemical change.
- 8. Multiple Choice
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
- 9. Multiple Choice
Identify what type of change happening in the picture below...
Chemical Change
Physical Change
Endothermic Reaction
Exothermic Reaction
- 10. Multiple Choice
Which of the following is an example of a physical change?
A glass falling and shattering on the floor.
Baking a birthday cake.
Burning a piece of paper.
Baking soda and vinegar mixing together.
- 11. Multiple Choice
When a new substance is formed with different properties than the original substance it is called a...
Chemical change
Physical change
Change in State
Change in appearance only.
- 12. Multiple Choice
Which is not a clue that could indicate a chemical change has occurred?
Change in color
Change in shape
Release of energy
Formation of an odor
- 13. Multiple Choice
During Chemical Reactions, the substances that are used are called?
Precipitate
Corrosion
Reactants
Products
- 14. Multiple Choice
During Chemical Reactions, the new substances created are called?
Precipitate
Corrosion
Reactants
Products
- 15. Multiple Choice
Which of the following is observed here?
A physical change because you have the same types of atoms
A physical change because you are just breaking the atoms up
A chemical change because you are forming a new substance
A chemical change because atoms are involved
- 16. Multiple Choice
How do you know that rusting is a chemical change?
it changes color
atoms were rearranged to form a new substance
we just know
the rust
- 17. Multiple Choice
What property of metals does the term conductivity describe? (HINT: Think back to 6th grade.)
reactivity with other elements
melting & freezing point
ability to transfer heat and electrcity
density
- 18. Multiple Choice
The following are examples of evidence of a chemical reaction....
ice melting into a liquid
condensation
endothermic reaction
change in color, production of gas bubbles
- 19. Multiple Choice
The formula for calcium chloride is CaCl2. Which is the best response that explains what the formula means?
chlorine is 2 times stronger than calcium
two chlorine atoms are bonded to one calcium atom
calcium and chloride have 2 covalent bonds
chlorine is unstable until it bonds with 2 more calcium
- 20. Open Ended
State one example of a chemical change.
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