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CAS Final Review 2
Test Description: Second final review for CAS
Instructions: Answer all questions to get your test result.
1) If the forces acting on a car in motion were unbalanced, any of these could happen except
A
the speed of the car might decrease until it stops
B
the speed of the car might increase
C
the car might change its direction of travel
D
the car might continue at the same speed and direction
2) Which of these best describes the structure of an atom?
A
a central, positive nucleus with orbiting protons
B
a central, positive nucleus with orbiting electrons
C
a central, negative nucleus with orbiting electrons
D
a central, negative nucleus with orbiting protons
3) Which of these makes the atoms of one element different from the atoms of another element?
A
number of neutrons
B
number of orbitals
C
number of protons
D
number of electrons
4) Which of these best describes what happens to the water molecules when the temperatures of liquid is increased?
A
the bonds between the molecules become weaker, and the molecules move closer together
B
the bonds between the molecules become stronger, and the molecules move farther apart
C
the bonds between the molecules become weaker, and the molecules move farther apart
D
the bonds between the molecules become stronger, and the molecules move closer together
5) Which scientist developed the atomic model with electrons moving around a central nucleus in definite orbitals?
A
Joseph John Thomson
B
Albert Einstein
C
Max Planck
D
Miels Bohr
6) A block of iron will react with acid to produce hydrogen gas. Which of these describe what will happen if iron powder were used instead of a block of iron?
A
The speed of the reaction would decrease
B
The speed of the reaction would increase
C
The reaction would no loner take place
D
The reaction would happen at the same speed
7) Peanut butter had a pH of 6.28. Which of these best describes peanut butter?
A
weak acid
B
weak base
C
strong base
D
strong acid
8) Which of these measurements represents a n object with the highest density?
A
a mass of 100 grams and volume of 100 milliliters
B
a mass of 100 grams and a volume of 10 milliliters
C
a mass of 10 grams and a volume of 100 milliliters
D
a mass of 10 grams and a volume of 10 milliliters
9) Which object is the best example of potential energy?
A
rolling ball
B
compressed spring
C
dropped rock
D
speeding motorcycle
10) Which of these best describes why heat is produces when a flashlight is turned on?
A
Heat is converted to light by the battery when the flashlight is turned on
B
Heat is product of the energy transformation that occurs when the flashlight is turned on
C
Heat is produces from the excess light that escapes when the flashlight is turned on
D
Heat is created by the battery and some of the heat is used to produce light for the flashlight
*select an answer for all questions
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