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3.5,3.6 &3.7
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How many calcium does the compound calcium carbonate (CaCO3) contains?
one
two
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The sailor did not know about gravity, so could not give an______ for the tides.
conclusion
explanation
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moves from one place to another
transferred:
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refers to objects that give out their own light
luminous
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Name the energy store in food
kinetic
chemical
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hydrogen sulfide (H2S) contains how many hydrogen atoms?
two
one
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something which happens that involves a change in energy
event
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State the time between: high tide and the next low tide.
6 hours
12 hours
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energy carried in a circuit or stored in charged objects
electrical
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What is the chemical formula for carbon monoxide?
CO2
CO
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What is the name given to the pull of gravity that causes tides?
tidal force
tidal range
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Name the energy store in a falling rock
gravitational potential and kinetic
kinetic only
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Which two elements are combined in magnesium oxide?
magnesium and oxygen
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Which of these is the name given to a cloud of dust and gas in space?
nebula
planet
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Name the force that can pull particles of dust and gas together in space.
gravity
tidal force
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Name the energy store in gasoline (petrol)
chemical
kinetic
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when energy changes from one store to another
changes in energy
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when energy is converted from one store to another
change
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energy transferred through vibrations
sound
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Which two elements are contained in all hydroxides (OH)?
hydrogen and oxygen
hydrogen and carbon
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Which three elements are combined in calcium nitrate?
calcium, nitrogen and oxygen
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The sailor thought that the change was caused by the Moon. This was a________
prediction
observation
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Which of these causes the force of gravity for tides on Earth?
the Moon only
the Sun and Moon
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quantity that must be changed in order to do something
energy
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Which two elements are combined in sodium chloride?
sodium and chlorine
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the unit of energy
joule
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Which two elements are combined in hydrogen sulfide?
hydrogen and sulfur
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energy stored in food as fuels
chemical
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What is the name of the compound with the formula LiOH?
lithium hydroxide
lithium oxide
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The sailor noticed that the depth of water changed. This was_________
a conclusion
an observation
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collected and used again
recovered
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one or more events that result in energy changes
process
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A student wrote this name for a compound made of calcium and sulfur: sulfur calcium. Is this correct?
No
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How does your mass on Earth would compare with your mass on Mercury.
It will be greater
It's the same
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The planet was seen to move further away from the Sun at regular times. These results were recorded. Which word best describes these results?
predictions
observations
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Calculate the mass of a car that has a weight of 8500 N.
850 kg
850N
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What is the correct formula for sodium hydroxide?
NaOH
NaHO
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a store of chemical energy
fuel
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energy stored when objects change shape
elastic potential
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energy stored when objects move higher
gravitational potential
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Which three elements are combined in magnesium carbonate?
magnesium, carbon and oxygen
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State the time between: one high tide and the next high tide
12 hours
6 hours
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energy contained in one place
stored
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Which three elements are combined in lithium sulfate?
lithium, sulfur and oxygen
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spread out into the surroundings in a way that cannot be recovered
dissipated
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energy is described as useful when it is changed in the way that we want
useful
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The strength of gravity is 10 N/kg on Earth. Calculate the weight of an adult who has a mass of 75 kg.
750N
7500N
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this is energy that is changed in a way that we do not want; usually cannot be recovered
wasted energy
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How many different elements are combined together in LiOH?
4, lithium, iodine, oxygen and hydrogen
3, lithium, oxygen and hydrogen
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the scientific term for heat energy
thermal
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What is the chemical formula for calcium oxide?
CaO
CO2
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energy that we can see
light
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energy associated with movement
kinetic
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