NAME_________________________________________Date__________________
HOMEROOM_____________________
SCIENCE Practice QUIZ Chapter 2- Week of Nov 18th
Relax! Take a deep breath! Count backwards from 10! Now
take your quiz!
1. Which of the following occurs when a liquid changes to a gas?
a) evaporation
b) sublimation
c) melting
d) freezing
2. A substance that is used in chemical reaction is called a reactant.
(combination, reactant)
True or False:
3. False Gases always have the same shape and volume.
4. True Heat and carbon can be used to release iron form ore.
5. How can you distinguish between a chemical and physical property?
Physical Properties can be seen or measured without changing a
material. Chemical properties indicate how a substance forms or
changes into new substances.
6. How are chemical changes and chemical reactions related?
Chemical changes occur as a result of chemical reactions. Chemical
reactions cause chemical change.
7. How can new substances form during a chemical reaction if no new
atoms are added?
Existing atoms combine in new ways with new properties. No new
atoms are added, but new substances are formed form this
rearrangement of atoms.
8. Identify the products and the reactants in the equation below:
HCl+ NaOH -> NaCl + H2O
The reactants are HCl and NaOH. The products are NaCl and H2O.
What does HCl, NaCl, and H2O stand for?
HCl stands for Hydrochloric Acid
NaCl stands for Sodium Chloride or Table Salt
H2O stands for Water.
9. Give an example of :
Physical change: Cutting/ Tearing paper, or ice melting, etc
Chemical change: Rust or burning, or magnesium oxide
formation, or baking soda and vinegar explosion, etc.
10. You bring some hot chocolate powder to school to stir into your hot
milk at lunchtime. One friend says that the powder is solid. Another
friend says that the powder is a liquid because it flows and takes the
shape of the bag you brought it in. Which friend is correct? Explain
your answer.
Even though the powder takes the shape of the bag, it is a solid. The
powder is infact very tiny pieces of solid.