[Free] 2018(Jan) EnsurePass Dumpsleader GED GED-Science Dumps with VCE and PDF 171-180

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GED Science Exam

Question No: 171

A study in Florida has revealed that the sex characteristic of an alligator is determined by temperature. Alligator eggs incubated at 30掳 C (86掳 F) hatched into female offspring. Eggs incubated at 34掳 C (93掳 F) resulted in male offspring. At the latter temperature, androgenic hormones are produced inside the eggs, resulting in the formation of male sex organs. At a temperature of 30掳 C, estrogenic hormones are produced, leading to the formation of female sex organs.

Based on the information above, which statement is most correct?

  1. If the eggs are laid in a nest that is 4掳 C warmer than the ideal temperature for estrogen production, the offspring will be male.

  2. When the eggs are laid in the open where sunlight can bake them, the offspring will be female.

  3. Warmer temperatures are required to produce hormones for female characteristics than to produce hormones for male characteristics.

  4. If the eggs are laid in a cool, shady place, the offspring will be male.

  5. Males hatch only when the Sun is shining.

Answer: A

Question No: 172

The surface area of a log can be increased by splitting it into strips. Split wood with a larger surface area will burn much faster than a whole log. In much the same way, a sugar cube will dissolve much faster if its surface area is increased.

Which method will most increase the surface area of a sugar cube?

  1. Reshape the sugar granules into a ball.

  2. Divide the sugar cube into four square pieces.

  3. Break the sugar cube in half.

  4. Use a small round sugar tablet.

  5. Crush the cube into tiny fragments.

Answer: E

Question No: 173


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Based on the information, which statement would explain this fact?

  1. Sound consists of vibrations in any material.

  2. Striking an object will start it vibrating.

  3. The vibrations of a solid object will start air molecules vibrating.

  4. Rails effectively absorb and deaden the sound.

  5. Sound travels fastest through a solid material.

Answer: E

Question No: 174

A loud sound, such as from a radio at a high volume, can be “deadened” more by hanging a heavy drape between the radio and the listener than by using a sheet of plywood.

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Based on the information, which statement would justify this conclusion?

  1. Sound waves would not reach the drape.

  2. The drape absorbs more sound than the plywood does.

  3. Plywood is harder to hang than drape.

  4. The plywood absorbs more sound than the drape does.

  5. The radio is playing louder than it should.

Answer: B

Question No: 175

The graph at the left includes data from an experiment that showed how long a windup toy ran after different numbers of turns of the key.

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What should have been done to ensure the accuracy and reliability of the experiment?

  1. Do the experiment only one time.

  2. Use a different windup toy to repeat the experiment.

  3. Increase the number of turns of the key to more than seven.

  4. Do the experiment several times with the same windup toy and same number of turns of the key.

  5. Change the temperature of the environment in which the experiment is conducted.

Answer: D

Question No: 176


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Based on the graph at the left, in which city would a solar water heating system pay for itself most quickly?

  1. A

  2. B

  3. C

  4. D

  5. E

Answer: D

Question No: 177

Which statement identifies the difference between a substance in liquid state and a substance in solid form?

  1. more space exists between its molecules in a liquid state

  2. the molecules contain more heat energy in its solid state

  3. the molecules are less active in its liquid state

  4. the molecules are large in its liquid state

  5. the molecules are large in its solid state

Answer: A

Question No: 178

Sonar is a tool that uses high-frequency ultrasonic waves for sound navigation and ranging. When this system is used, high-frequency ultrasonic waves are sent out, bouncing off objects and reflecting back to their source. This reflected sound is called an echo. The time taken for each emitted sound to return gives information as to how far away the object is.

From the information given, which of the following would be LEAST LIKELY to use sonar?

  1. a bat flying at night looking for food

  2. a submerged submarine looking for enemy ships

  3. a dolphin navigating underwater

  4. a fishing ship looking for schools of fish

  5. a honeybee collecting pollen

Answer: E

Question No: 179


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Profiles (side views) can be used to tell the geologic changes in mountain ranges.

Which characteristic of the three profiles shown at the left is most useful in arranging them according to age?

  1. the number of valleys in the mountains

  2. the height of the peaks

  3. the mineral content of the rock in the mountains

  4. the number of streams in the mountains

  5. the width of the base of the mountains

Answer: B

Question No: 180

Nitrites are used by the meat-packing industry to maintain the appetizing red color of cured meats and smoked fish and to protect the consumer from botulism. However, in the acid environment of the stomach, nitrites can combine with amines to form nitrosamines, which are potent carcinogens.

Which behavior is most effective for all urban consumers to minimize exposure to nitrosamines?

  1. Eat meats such as canned hams and bacon.

  2. Increase the consumption of fresh vegetables.

  3. Eat only at fast food restaurants.

  4. Limit the amount of cured meats and smoked fish consumed.

  5. Take large doses of antacids after eating cured meats and smoked fish.

Answer: D

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