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32 Cards in this Set
- Front
- Back
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What is an independent variable?
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What we change in a experiment.
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What is a dependent variable?
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What we measure in a experiment.
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What is a control variable?
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What we keep the same in a experiment.
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How can you increase speed of a moving object?
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Friction, forward force, more air resistance, streamlining
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final speed - initial speed = ?
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final speed - initial speed = change in speed
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speed= ? x ?
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speed= acceleration x time
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distance= ? x ?
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distance = speed x time
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acceleration is ........ to force
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acceleration is proportional (∝) to force
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f=ma
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force= mass of the object x acceleration of the object
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what is air resistance?
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when the object moves through the air, it has to push air away. The air resists being moved and pushes back. A force is used to push air away, the force is called air resistance.
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what is speed?
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how far something travels in a certain amount of time
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What is acceleration?
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the rate of change in speed
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What is terminal velocity?
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When weight and air resistance is balanced
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When is it summer in the northern hemisphere?
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when the north pole is tilted towards the sun
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Why are days longer in summer?
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Because the sunlight is more intense
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Why is earth's orbit time shorter than Saturn's?
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Earth is closer to the sun so Saturn has a longer length of path to complete one orbit of the sun.
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My Very Easy Method Speeds Up Names
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Mercury Venus Earth Mars Saturn Uranus Neptune
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What type of Heat Transfer:
Sun's heat travelling from the Sun to the top of Venus' atmosphere |
Radiation
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What type of heat transfer:
Heat passing from the top of Venus' atmosphere to the surface |
Radiation
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What type of heat transfer:
Heat rising from the surface through the atmosphere |
Convection
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What is a lunar eclipse?
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Lunar eclipse takes place at Full Moon, or when the Moon passes through some of Earth's shadow, so that the Earth stops the Sun's rays from reaching the Moon.
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What is a solar eclipse?
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A solar eclipse occurs when the moon passes in a direct line between the Earth and the sun. The moon's shadow travels over the Earth's surface and blocks out the sun's light as seen from Earth.
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Gravity= ?/?
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Gravity= Weight/Mass
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What is mass?
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How much of the thing there is.
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What is weight?
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The pull on the mass.
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How do you work out an equation of a line?
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y=mx+c
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What is orbiting?
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Being caught in a gravitational pull so that a satellite goes round the planet.
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Name three types of satellites.
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GPS Satellite, Geostationary Satellite, Polar Satellite
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moment = ? x ?
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moment= force x distance
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More surface = ? pressure
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more surface area = less pressure
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Why does more area = less surface area?
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There is a same amount of force for a smaller surface area, so it more concentrated.
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Pressure = ?/?
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Pressure = Force/ Area
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