130412
Descripción
Test por PatrickNoonan, actualizado hace más de 1 año
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Creado por PatrickNoonan
hace casi 11 años
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Pregunta 1
Pregunta
According to the Theory of Evolution, what sort of variation is inherited?
Respuesta
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Environmental variation
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Genetic variation
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Variation is not inherited
Pregunta 2
Pregunta
What is the most likely reason why wasps and bees have black and yellow stripes?
Respuesta
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The stripes warn other animals that wasps and bees are dangerous
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The stripes are attractive to birds and other predators
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The stripes make them look like harmless hoverflies, so they can sneak up on their prey
Pregunta 3
Pregunta
In the Carbon cycle, decay happens faster when the conditions are:
Respuesta
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Warm and Dry
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Cold and Moist
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Warm and Moist
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Cold and Dry
Pregunta 4
Pregunta
What is the most likely reason why animals in hot climates have larger ears than similar animals in cold climates?
Respuesta
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It is more difficult to hear in hot air, so bigger ears are needed
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Big ears lose heat quickly, while small ears lose heat slowly
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Big ears are useful for creating a breeze when they are flapped quickly
Pregunta 5
Pregunta
During the early stages of the Earth's atmosphere Nitrogen and Carbon Dioxide were the most common gases. What caused the increased in the level of oxygen?
Respuesta
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Respiration
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Photosynthesis
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Volcanic activity
Pregunta 6
Pregunta
A coal-fired power station is 40% efficient. This means that:
Respuesta
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40% of the chemical energy stored in coal is transferred to electrical energy
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60% of the chemical energy stored in coal is transferred to electrical energy
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40% of the chemical energy stored in coal is transferred to the surroundings as heat
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60% of the chemical energy stored in coal is transferred to the surroundings as heat
Pregunta 7
Pregunta
The energy transferred by an electrical appliance can be calculated using this equation:
energy = power × time
How much energy is transferred by a 500 W electric drill in 30 seconds?
Respuesta
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15,000 J
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250 J
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25 J
Pregunta 8
Pregunta
Which piece of evidence supports the Big Bang theory?
Respuesta
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The more distant galaxies are moving the slowest.
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The more distant galaxies are moving the quickest.
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The more distant galaxies are moving towards us.
Pregunta 9
Pregunta
About how long ago do scientists believe the universe began?
Respuesta
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13,700 million years
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1,370 million years
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137 million years
Pregunta 10
Pregunta
According to the Doppler effect, what happens to sound waves emitted at a constant pitch from a car moving towards you?
Respuesta
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They move more quickly, so their pitch increases
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Their frequency increases, so their pitch increases
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Their wavelength increases, so their pitch increases
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