[Free] 2018(Jan) EnsurePass Examcollection GED GED-Science Dumps with VCE and PDF 41-50

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GED Science Exam

Question No: 41

In a suspension, two materials will mix together only temporarily. One material does not dissolve into the other, but stays suspended only until gravity pulls it down.

Which is an example of a suspension?

  1. colored water

  2. muddy water

  3. bleach

  4. ice water

  5. carbon dioxide and water

Answer: B

Question No: 42

A major volcanic eruption put large amounts of dust into the upper atmosphere. For three years following the eruption, Earth’s weather was cooler than normal. Which of the following is NOT a testable hypothesis regarding the relationship between the eruption and the weather?

  1. Volcanic dust can reduce the amount of sunlight entering Earth’s atmosphere.

  2. The magnitude of an eruption determines the amount of dust injected into the atmosphere.

  3. The smallest volcanic dust particles can remain in the atmosphere for years.

  4. If a planet is outside our solar system, volcanic eruptions will affect its weather.

  5. Clumps of dust particles can aid cloud formation by acting as sites for condensation.

Answer: D

Question No: 43

If a weight with a string attached is swung in a horizontal circular motion around in the air, the path of the weight will appear as shown in the figure at the left.

If the string breaks when the weight is at position A, the weight will fly away in a straight line tangent to the circular path.

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In order for the weight to hit an object located at position X, the person should let go of the string when the weight is located at which position?

  1. B

  2. C

  3. D

  4. E

  5. F

Answer: D

Question No: 44

Sugar is produced in the sugar beet’s leaves through photosynthesis and then is transported to the root. The root of a sugar beet weighs from 1.5 to 3 pounds.

For what purpose is the root of the sugar beet adapted?

  1. storage of water

  2. storage of sugar

  3. photosynthesis

  4. transport of sugar

  5. production of sugar

Answer: B

Question No: 45

Atmospheric pressure decreases as you get higher in altitude. What is the primary reason helium balloons released in the air eventually burst?

  1. Pressure inside the balloons becomes too great for the rubber to resist.

  2. The air is too cold at high altitudes, and the rubber weakens and cracks.

  3. The balloons are hit by planes or pecked by birds.

  4. Pressure outside the balloons increases; the balloons burst when squeezed.

  5. The balloons burst because the air gets hotter at high altitudes.

Answer: A

Question No: 46

Halley#39;s comet has a greater chance of striking a planet as it nears the Sun

According to the diagram which of the following statements best supports this conclusion? Exhibit:

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  1. Halley’s comet travels to a point beyond Neptune.

  2. Halley’s comet crosses more planetary orbits near the Sun.

  3. Halley’s comet crosses the orbit of Encke’s comet twice near the Sun.

  4. Halley’s comet and Encke’s comet both have elliptical orbits.

  5. Halley’s comet has a longer orbit than Encke’s comet.

Answer: B

Question No: 47

Some recipes suggest that certain foods, such as sauces and frostings, be prepared in a double boiler, such as the one shown at the left.

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Which statement best describes the advantage of using a double boiler?

  1. The food in the top pan absorbs the heat energy from the water and keeps the temperature of both substances just below the freezing point of water.

  2. The food in the top pan will be cooked at a temperature several degrees higher than the boiling point of the water.

  3. As long as boiling water is in the bottom pan, the food will be cooked at the constant temperature of the boiling water.

  4. Less energy is required for the food to reach a boiling temperature than for the water to reach a boiling temperature.

  5. Twice as much food can be cooked using half the amount of energy.

Answer: C

Question No: 48

A spontaneous process is a physical or chemical change that occurs by itself. The change requires no input of work or energy in any form.

Which of the following everyday occurrences results from a spontaneous process?

  1. water boiling

  2. iron rusting in moist air

  3. hydrocarbon emissions from gasoline combustion

  4. water freezing

  5. snow melting

Answer: B

Question No: 49

What is the underlying principle behind the operation of a jet engine? Exhibit:

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  1. The engine burns air from the exhaust to decelerate the plane.

  2. Shooting a jet of gases backward thrusts the plane forward.

  3. An electric heater is used to form hot gases.

  4. Minimizing the friction in the engine increases velocity.

  5. The engine allows the plane a cruising velocity faster than the speed of sound.

Answer: B

Question No: 50

In the gear arrangement shown at the left, turning gear A will turn gear B in the direction

marked with arrows.

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Which of the following will cause gear B to turn more rapidly?

  1. turning gear A more slowly

  2. putting a gear of smaller diameter at B

  3. using a much more dense metal in gear B than gear A

  4. using gears that have an equal number of “teeth”

  5. putting a gear of larger diameter at B

Answer: B

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