PES Skill Sheets.book - Capital High School

Skill Sheet 5.1: Ratios and Proportions
1. 6 tablespoons; 2 eggs
2. 3 / 4 cup; 1 / 3 teaspoon
3. 1 / 4 teaspoon; 3 / 4 cup
Skill Sheet 5.1: Internet Research
Part 1 answers:
1. Example answer: “science museums” + “South Carolina” not
“Columbia”
2. “dog breeds” + “inexpensive”
3. “producing electricity” not “coal” not “natural gas”
Part 2 answers:
1. Answers will vary. Sites that may be authoritative include
non-profit sites (recognizable by having “org” as the
extension in the web address) or government sites such as
www.nasa.gov (recognizable by the “gov” extension address)
or college/university websites (recognizable by the “edu”
extension address). These sites often provide information to
large, diverse groups and are not typically supported by
advertising. Sites that are supported by advertising can be
Skill Sheet 5.1: Bibliographies
No student responses are required.
Skill Sheet 5.1: Mass vs. Weight
1. 15 pounds
2. 2.6 pounds
3. 7.0 kilograms
4. Yes, a balance would function correctly on the moon. The
unknown mass would tip the balance one-sixth as far as it
would on Earth, but the masses of known quantity would tip
the balance one-sixth as far in the opposite direction as they
did on Earth. The net result is that it would take the same
amount of mass to equalize the balance on the moon as it did
on Earth. (In the free fall environment of the space shuttle,
however, the masses wouldn’t stay on the balance, so the
balance would not work).
5. Answers are:
a. As the elevator begins to accelerate upward, the scale
reading is greater than the normal weight. As the elevator
accelerates downward, the scale reads less than the
normal weight.
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4. Table answers:
Sugar
3 /8 cup
Butter 3 tablespoons
Milk 1 tablespoon
Chocolate chips 1 cup
Eggs
Vanilla extract
1 egg
Baking soda
Salt
1 /2 teaspoon
1 /6 teaspoon
1 /8 teaspoon
Confectioner’s sugar 1 tablespoon
5. To make 16 brownies, you need two eggs and 2 tablespoons
of sugar. Therefore, to make 8 brownies, you only need 1 of
each unit for each ingredient: 1 egg and 1 tablespoon of sugar.
6. Since 8 brownies requires 1 cup of chocolate chips, 3 cups of
chocolate chips will make 24 brownies.
7. 1.5 teaspoons vanilla are needed to make 24 brownies.
authoritative, but may be biased in the information presented.
Another characteristic of authoritative sites are that they are
actively updated on a regular basis.
2. Answers will vary. Reasons for why a source may not seem to
be authoritative include: the author of the site is not affiliated
with an organization and does not have obvious credentials,
and the information seems to be one-sided. Many science
topic searches will lead to student papers published on the
Internet. These may contain mistakes, or they may have been
written by a younger student.
3. Answers will vary. Intended audiences can be young children,
pre-teens, teenagers, adults, or select groups of people
(women, men, people who like dogs, etc.).
4. Answers will vary.
b. When the elevator is at rest, the scale reads the normal
weight.
c. The weight appears to change because the spring is being
squeezed between the top and the bottom of the scale.
When the elevator accelerates upward, it is as if the
bottom of the scale is being pushed up while the top is
being pushed down. The upward force is what causes the
spring to be compressed more than it is normally. When
the elevator accelerates downward, the bottom of the scale
provides less of a supporting force for the feet to push
against. Therefore, the spring is not compressed as much
and the scale reads less than the normal weight.