Physical science NC’s released form
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Why does a flat piece of notebook paper take longer to reach the ground than an identical piece of notebook paper crumpled into a ball?
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Because the frictional force of air has more effect on the falling flat piece of paper.
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why does the weight of an object change with increasing elevation on earth?
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Because the force of gravity acting on the object decreases with higher elevation.
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Which type of friction occurs when an eraser is rubbed across a sheet of paper?
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It's sliding friction.
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What is an example of a mixture?
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A bronze pipe.
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What is one the elements that is the most chemically reactive?
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Potassium.
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How can two different nonmetals form a compound?
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by sharing electrons.
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What is the chemical formula for magnesium hydroxide?
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Mg(OH)2
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What is the correct name for the compound NaNO3?
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Sodium nitrate
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Why does a student's hand feel cold when holding an ice cube?
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Because heat flows from the hand cold to the ice cube.
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What happens to molecules in a pot of water as it is heated?
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They move faster
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What describes the kinetic energy of a ball in free fall?
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The kinetic energy increases because the velocity increases.
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How do radio waves and visible light waves differ?
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Radio waves have a lower frequency than visible light waves.
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What is true about a series circuit?
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All the current flows through every part of the circuit.
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This action will have the least effect on the strength of an electromagnet?
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Changing the current's direction.
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Why is there no gravity on the moon?
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The moon's gravity is much less than the earth's gravity and weight is a measure of the gravitational pull between two objects.
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How many planets our in the solar system?
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8
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What is the hottest planet in our solar system?
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Venus
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Is life possible on Mars?
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No it's been proven unsuitable for life due to the hostile whether environment.
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How long does it take to get to Mars?
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About 260 days.
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Which planet is closest to earth?
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Venus
