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Physical Science 1 DANTES Practice Test
1) Every magnet
A) Has two poles – east and west
B) Has a field of force which runs from the north to the south pole
C) Is made of iron
D) Is a permanent magnet
2) An example of a second class lever is
A) Pulling a nail using a claw on a hammer head
B) Raking leaves
C) Hitting a ball with a bat
D) Moving mulch with a wheelbarrow
3) If a ball is dropped from a height of 36 meters, how long will it take to hit the ground?
A) 7.3 s
B) 2.7 s
C) 9.8 s
D) 3.7 s
4) When banking a curve in a road, the angle at which the road should be banked depends on
A) The mass of the vehicle
B) The radius of the curve
C) The speed of the vehicle
D) The condition of the tires on the vehicle
5) The release of a beta particle by 14 6 C results in
A) No change to the carbon
B) 14 7 N
C) 16 8 O
D) 14 7 C
6) As the number of neutrons in an atom of a given element increases, its atomic
A) Number increases
B) Number decreases
C) Mass increases
D) Mass decreases
7) Approximately how many moles of atoms are there in 48.09 grams of sulfur?
A) 16.03 moles
B) 0.667 moles
C) 1.50 moles
D) 1541.77 moles
8) Ammonium sulfide + iron(II) nitrate →
A) NH4NO3 + FeS
B) 2 NH4NO3 + FeS
C) 2 NH3NO3 + Fe3S2
D) (NH4)2NO3 + FeS
9) The oxidation number of H in Ba(OH)2 is
10) In liquids dissolved in liquids, little change in temperature is expected because
A) Only a small amount of solute can dissolve
B) All liquids are completely miscible
C) No change in physical state occurs
D) Hydration prevents chemical activity
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Principles of Physical Science 1 DSST Practice Test Answer Key:
- 1. C:) Is made of iron. Has a field of force with runs from the north to the south pole. Every magnet has two poles, a north pole and a south pole, with a field of force which runs from the north to the south pole.
- 2. D:) Moving mulch with a wheelbarrow. Moving mulch with a wheelbarrow. In a second class lever the resistance is between the effort and the fulcrum. A wheelbarrow is a good example as the person exerts the effort, the fulcrum is the wheel, and the resistance is the load of mulch between the person and the wheel.
- 3. B:) 2.7 s. d = v0t + ½ at2. Therefore, 36 m = 0 + ½ (9.8 m/s2)(t2). Dividing, you get t2 = 7.3 s2. And, take the square root t = 2.7 seconds.
- 4. C:) The speed of the vehicle. The angle at which the road should be banked depends on the speed of the vehicle, but not its mass.
- 5. B:) 14 7 N. The reaction is 14 6 C → 14 7 N + o -1 e.
- 6. C:) Mass increases. The atomic number is the number of protons while the atomic mass is the number of protons and neutrons.
- 7. C:) 1.50 moles. 48.09 g S x 1 mole S / 32.06 g S = 1.50 moles.
- 8. B:) 2 NH4NO3 + FeS. Double displacement reaction: (NH4)2S + Fe(NO3)2 → 2 NH4NO3 + FeS.
- 9. A:) +1. Hydrogen is always +1 except in a metal hydride such as NaH when it is -1.
- 10. C:) No change in physical state occurs. No heat is given off or required to make a phase change.