اختبار الكتروني العلوم لغات الصف الرابع نموذج (1)

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........... When the mass of the body is more
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...... When a fast car collides a wall
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The airbag inflates
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The kinetic energy depends on
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A red car moves at speed of 40km/h and collides from the rear- end with a white car which moves at speed of 30km/h, which of the following is false
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The sum of the energies of balls before collision is the sum of the energies of balls after collision
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The energy in Newton's cradle is converted to
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is example for biofuels .............
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.......... Airbags help in
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In Newton's cradle; a part of energy is lost in form of
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From the disadvantages of coal as a fuel is that it is ............ resource
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..... The kinetic energy of a vehicle increases when
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We should .... our consumption of non- renewable sources
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Most of the lost energy inside the energy chain of devices escapes in form of
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The electric energy transfers from power plants to the consumer through
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The North Pole is considered from the ecosystems
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......... We can convert solar energy to electric energy by using
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The nearest distance between the earth and mars is about .... million km
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...... All of the following need fuels except
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We can move the arms of toy trucks and toy planes remotely by using
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Most of the energy chains start from
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The body which has more kinetic energy causes more damage due to
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converts the electric energy to light energy .........
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The amount of energy transfer between 2 bodies when they collide depends on
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The function of electric heater is to heat water but it produces some unimportant noise to operate it, this sound energy is
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The wrecking ball has ........... when it moves
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is used as sources of energy for robots in space .........
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........ Fuel is the substance that produces thermal energy when it
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Energy ............. help us to understand and follow the paths of energy
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The formation of ...... is originated from the remains of plants
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is an energy resource which pollutes the environment ..........
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energy in turbines is used in operating the generator .........
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is used to make ethanol and charcoal ...........
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Burning of fossil fuels is considered as one of the causes of
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is from the renewable resources of energy .........
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The remains of plants and animals are converted to coal under the effect of
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The scientists thought that oil is formed from decay of
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is from the energy resources available for use as an alternative to fossil fuel
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converts the kinetic energy to electrical energy ...........
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is from the advantages of using the renewable resources ..........