1.
Which of the following is an example of an exothermic
reaction?
a. Water changes from ice to a liquid
b. Hydrogen peroxide reacts with yeast and
becomes warm
c. The chemicals in an ice pack mix and become
cold
d. Water from a hot shower turns to steam in the
bathroom
2.
Which of the following is an example of an endothermic
reaction?
a. Liquid water cools to form ice
b. A log burning
c. Cutting paper in half
d. Calcium chloride and baking soda mix and
become cold
3.
You and your partner combined an acid and a metal.
Your observations said that it was an exothermic
reaction. What does this mean?
a. mass was lost
b. heat/energy was absorbed
c. mass was gained
d. heat/energy was released
4.
A reaction that releases (exits) heat or energy is called
_____________ reaction.
a. Endothermic
b. Chemical
c. Exothermic
d. Open System
5.
What is the definition of “reactants” in a chemical
reaction?
a. When a reaction releases heat
b. When a reaction absorbs heat
c. The chemicals that are added to a chemical
reaction
d. The result of mixing chemicals in a chemical
reaction
6.
7.
What is the definition of “products” in a chemical
reaction?
a. When a reaction releases heat
b. When a reaction absorbs heat
c. The chemicals that are added to a chemical
reaction
d. The result of mixing chemicals in a chemical
reaction
When ammonium chloride crystals are dissolved in
water, the temperature of the water decreases.
What does this temperature change indicate about
the dissolving of ammonium chloride in water?
a. It is an endothermic reaction because it
absorbs heat.
b. It is an endothermic reaction because it
releases heat.
c. It is an exothermic reaction because it
absorbs heat.
d. It is an exothermic reaction because it
releases heat.
8.
A substance added to increase reaction by
decreasing the amount of activation energy is called
__________.
a. Catalyst
b. Reactants
c. Inhibitor
d. Products
9.
When sodium hydroxide (NaOH) is added to
hydrochloric acid (HCl), sodium chloride (NaCl) and
water (H2O) are produced. Based on the type of
change that takes place between starting materials
and products, which of these is most similar to this
process?
a. cutting a sandwich into two halves
b. dissolving sugar in a glass of water
c. cooking flour, water, and eggs to make a
cake
d. mixing lettuce and tomatoes to make a
salad
10. Lab partners were conducting an experiment by
mixing two reactants together in a flask. The result
was an endothermic reaction. What most likely
happened to the flask?
a. It got colder.
b. It got hotter.
c. It dissolved.
d. It expanded.
11. During chemical reaction, what never changes?
a. The temperature
b. The color
c. The number of atoms
d. The number of compounds/molecules
12. What law explains that the mass of the reactants
must equal the total mass of the products?
a. Law of Mr. Rivera
b. Law of conservation of mass
c. Law of chemistry
d. Law of atoms
13. A reaction of H2 gas and O2 gas react to form H2O.
If the reaction started with 3 grams of hydrogen gas
and 1.5 grams of oxygen gas, how many grams of
water will be produced?
H2 + O2  H2O
3g + 1.5g = ?
a. 1.5 grams
b. 3.0 grams
c. 4.5 grams
d. 6.0 grams
14. In the chemical reaction, which of the following
properties will remain UNCHANGED during
reaction?
a.
b.
15.
16.
17.
18.
19.
20.
The temperature of reaction
The properties of the molecules or
compounds
c. The number of atoms in the reactants and
products
d. The number of compounds or molecules
In a science class, Amy mixes 10 grams of water, 3
grams of HCl, and 4 grams of baking soda. What
should the mass of the products be?
a. 3 grams
b. 10 grams
c. 14 grams
d. 17 grams
If a solution has a pH of 2, which statement is true?
a. It is neutral
b. It is a base
c. It is an acid
d. It is a salt
Jenna used pH paper to test the pH of a solution.
She found that the solution is basic. A solution is
considered basic when its pH is
a. Equal to 7
b. Less than 7
c. Greater than 7
d. Between 5 and 8
What is an indicator?
a. A reaction that produces gas
b. A tool to measure conservation of matter
c. A substance that changes colors to show
acids and bases
d. A reaction that releases heat
Characteristics of acid includes
a. Sour
b. Slippery
c. Reacts with metal
d. Both a and c
When a substance is said to be basic, it
a. Feels slippery
b. Taste sour
c. Taste sweet
d. Taste salty
21. Conservation of mass means that…
a. You have different amounts of products and
reactants.
b. You have the same amount of items from
the start to the end.
c. You have different amount of items from
the start to the end.
d. You have a different amount of products
and reactants.
22. _______ are the materials that you end up with in
a chemical reaction.
a. reactant
b. product
c. mass.
d. matter
23. A scientist created a chemical reaction in which 4.0
grams of one material was mixed with 12.0 grams of
another material to get a new material. Using what
you know about conservation of mass, what is the
mass of the new material?
a. 4.0 grams
b. 12.0 grams
c. 16.0 grams
d. 8.0 grams
24. ______ are the materials that you start with in a
chemical reaction.
a. reactant
b. product
c. mass
d. matter
25. To make water, we mix hydrogen gas with oxygen
gas to get H2O (water). Using what we know about
conservation of mass, which of the following
properties will stay the same?
a. the states of matter
b. the total number of atoms from start to
finish
c. the temperature
d. the chemical properties of the molecules
For Questions 26-30. Look at the following equation.
Balance it to figure out the answer to the questions.
___HgO  ___ Hg + ___O2
26. What is/are the reactant(s) for this chemical
equation?
a. HgO
b. Hg, O2
c. HgO, Hg
d. HgO, Hg, O2
27. What is/are the product(s) for this chemical
equation?
a. HgO
b. Hg, O2
c. HgO, Hg
d. HgO, Hg, O2
28. What number should we put in front of HgO to
make the chemical equation balanced?
a. 1
b. 2
c. 3
d. 4
29. What number should we put in front of Hg to make
the chemical equation balanced?
a. 1
b. 2
c. 3
d. 4
30. What number should we put in front of O2 to
make the chemical equation balanced?
a. 1
b. 2
c. 3
d. 4
31. Balance this equation. Copy the equation on your
quiz.
___CuO + __H2  ___Cu + H2O
32. ___________ is everything around us and is the
stuff of the universe
a. mass
b. volume
c. matter
d. density
33. The five senses are …
a. read, write, math, speak, listen
b. see, touch, taste, smell, hear
c. see, touch, read, write, smell
d. taste, touch, math, write, listen
34. A ___________ can change how an object looks,
but does not make the object into a new material.
a. Characteristic change
b. Physical change
c. Chemical change
d. Phase change
35. Daniel is playing with fire! He burns his burrito in
the fire and it turns to ash. What kind of change
happened to his burrito?
a. Characteristic change
b. Physical change
c. Chemical change
d. Phase change
36. In the silly putty lab, a chemical change occurred
because…
a. No new material was created
b. A solid turned to gas
c. As gas turned to liquid
d. new material was created
37. Oh no! Julia is clumsy! She accidentally dropped a
glass that broke in lots of small pieces. What kind of
changed happened?
a. Characteristic change
b. Physical change
c. Chemical change
d. Phase change
38. A ____________ can turn an object into new
material.
a. Characteristic change
b. Physical change
c. Chemical change
d. Phase change
39. I mixed hydrogen peroxide (the stuff you use with
cuts) with potassium iodide (a crystal) and it starts
fizzing. Did a chemical change happen?
a. Yes, because gas was released.
b. Yes, because the temperature changed.
c. No, because everything stayed the same.
d. No, because we got more hydrogen
peroxide.
Write whether this is a chemical change or a physical change.
C= chemical change. P = physical change.
40. ______ Ripping paper into pieces
41. ______ Painting wood
42. ______ Burning wood
43. ______ Freezing water
44. ______ Baking a cake
45. ______ Ice cream melting
46. ______ Making lemonade
Answer in complete sentences!
47. Angel mixes baking soda and vinegar in a bag, seals it
and shakes it up. The mixture fizzes and bubbles and
also grows warmer.
a.
Tell me what happened to the materials
when they were mixed together. (2 points)
b. Explain how Angel can tell a chemical
reaction has happened. (2 points)
48. Acids taste…
a. sweet
b. spicy
c. bitter
d. sour
49. _____ turn litmus paper blue
a. acids
b. bases
c. neutral
d. nothing
50. A type of acid in our bodies is…
a. fertilizer
b. stomach acid
c. to clean bricks and metals
d. to clean our kitchen and bathrooms
51. Bases taste…
a. sweet
b. spicy
c. bitter
d. sour
52. ______ turn litmus paper red
a. acids
b. bases
c. neutral
d. nothing
53. Bases feel _____________.
a. cold
b. wet
c. slippery
d. dry
54. Bases are used in our home to…
a. clean metal
b. digest our food
c. clean bricks
d. clean the kitchen and bathrooms
55. The pH of acids are from…
a. pH = 1-6
b. pH = 1-14
c. pH = 8-14
d. pH = 7
56. A pH indicator tells us…
a. how hot a liquid is
b. whether a liquid is an acid, base or neutral
c. how sour a liquid is
d. how spicy a liquid is
57. A neutral liquid means…
a. neither an acid or a base
b. it is an acid and a base
c. means it is an acid
d. means it is a base
58. The pH of a base is…
a. pH = 1-6
b. pH = 1-14
c. pH = 8-14
d. pH = 7
59. Questions 12-15: Look at the picture. Fill in the
words where they would fall on the pH scale.
Strong acid, strong base, weak acid, weak base,
neutral
1 2 3 4 5 6
# 60
7 8 9 10 11 12 13 14
#61 #62
#63
#64
60. _________________
61. _________________
62. _________________
63. __________________
64. List 3 acids that you know and tell me why they are
acids. List 3 bases that you know and tell me why
they are bases.