최신 GED Certification GED-Science 무료샘플문제:
1. Atmospheric pressure decreases as you get higher in altitude. What is the primary reason helium balloons released in the air eventually burst?
A) The balloons burst because the air gets hotter at high altitudes.
B) The balloons are hit by planes or pecked by birds.
C) The air is too cold at high altitudes, and the rubber weakens and cracks.
D) Pressure inside the balloons becomes too great for the rubber to resist.
E) Pressure outside the balloons increases; the balloons burst when squeezed.
2. Studies of Moon rock show that much of the Moon is composed of basalt. Which of the following statements is the most reasonable conclusion based upon this information?
A) has experienced frequent, strong earthquakes
B) was once covered by oceans
C) has experienced much erosion
D) has experienced volcanic activity
E) has experienced periods of flooding
3. In a suspension, the particles are larger and tend to settle out; in a solution, the particles are microscopic and do not settle out. Pure substances contain only one compound and are not mixtures.
Exhibit:
The contents in the container probably represent which of the following?
A) a supersaturated solution
B) a dilute solution
C) a suspension
D) a saturated solution
E) a pure substance
4. Scientific information is always tentative and subject to further checking for accuracy.
Which choice is the best way to check data obtained from a specific experiment?
A) Contact government agencies.
B) Repeat the experiment.
C) Do research on the Internet.
D) Consult with experts.
E) Do another related study.
5. Gases are one of three common states of matter and are affected by changes in temperature, volume, and pressure. When the pressure of a gas in a closed container becomes too high, it can cause the container to burst. The graph below illustrates the relationship between pressure and temperature (K) for ordinary gases.
Aerosol cans contain a pressurized gas that is used to propel, or spray, the contents out of the can. Many aerosol cans have labels that warn the users against incinerating (burning) them because of the danger of explosion.
What would happen to the pressure of the gas if the temperature inside the can increases?
A) increase
B) increase, and then decrease
C) vary
D) remain the same
E) decrease
질문과 대답:
| 질문 # 1 정답: D | 질문 # 2 정답: D | 질문 # 3 정답: C | 질문 # 4 정답: B | 질문 # 5 정답: A |
1101 개 고객 리뷰
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