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SCIENCE OLYMPIAD TRYOUTS EXAM WITH QUESTIONS AND VERIFIED ANSWERS
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SCIENCE OLYMPIAD TRYOUTS EXAM WITH QUESTIONS AND VERIFIED ANSWERS....
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SCIENCE OLYMPIAD TRYOUTS EXAMWITH QUESTIONS AND VERIFIED
ANSWERS
Density - mass/volume
Physical property - ANSWER A feature of a pure substance that may be viewed
without transforming it into another substance
Chemical properties - ANSWER A feature of a pure substance that describes its
ability to transform into other substances.
Physical Change - ANSWER A change in a material that does not include a change
in the substance's identity.
Chemical change - ANSWER A transformation in matter that yields one or more
new compounds.
Matter - ANSWER Anything that has mass and occupies space
mass is the amount of matter in a thing.
Weight - Answer A measurement of the force of gravity on an object.
Volume - Answer The amount of space an object occupies
Physical change examples include cutting rope, crumpling paper, melting ice, and
evaporating water.
Matter: Chemical Change - ANSWER cannot return to its former form.
, For example, burning paper affects it. It becomes soot. It cannot be converted back
to paper.
Adding heat to something usually causes a chemical change.
Burning - Chemical Change
Melting is a physical transformation from solid to liquid.
Calculate density: mass/volume.
Rounding - ANSWER As requested, round a number to the nearest thousandth,
hundredth, tenth, one, ten, hundred, thousand, and so on.
Density units: g/mL or g/cm3.
The units of mass are grams (g), kilograms (kg), and micrograms (mg).
Volume units: ANSWER mL or cm3
ANSWER: Physical Properties A feature of a pure substance that may be viewed
without transforming it into another substance
ANSWER: Chemical characteristics Characteristics that cannot be observed
without changing the substance.
A chemical reaction is the process of changing one or more chemicals to produce
one or more distinct ones.
substance: ANSWER A single type of pure matter with a defined set of attributes.
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