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IPS/Physics Exam

QuestionAnswer
When reading instruments, read to the... Smallest Scale Division (SSD)
When reading an instrument, estimate _ place(s) to the right. 1
If the SSD is 1, read to... 0.1
What is the amount of space that something takes up? volume
What measurement do we use for volume? cm(3)
What is the formula for the volume of a rectangular solid? l x w x h
What substances have a miniscus that curves up in a graduated cylinder? Substances like mercury
How do we find the volume of an irregular solid? Liquid displacement
What is the process of liquid displacement a)Find volume of the liquid alone [VL] b)Find volume of liquid + solid [VL + S] c)Volume of solid= VS= VL+S-VL
When can liquid displacement not be used? If it floats, is a sponge-like object, or dissolves.
How do you find the volume of a granular solid? Also use liquid displacement.
What refers to the slight variations in measured results? Experimental Error
Experimental error is caused by: limitations of measuring instruments, differences in human judgement, or manufacturing variations in supposedly identical objects
What is not a REAL error? experimental error
Where does experimental error show up? Data that is similar, but not identical
How do we handle EE? by eliminating values that are far off from the norm
What is the amount of matter itself in an object? Mass
What do we measure mass in? grams
what is a change in form, not in identity? physical change
In what kind of change is it easy to conceive how to reverse the change? physical change
What is a change in identity and form? Chemical Change
What kind of change is usually not easy to reverse? Chemical change
In a closed system, the total mass of all the reactants before a physical or chemical change is the same as the total mass of all products after the change Law of Conservation of Mass
When putting numbers into scientific notation, increase the exponent if the number gets ___. smaller
When putting numbers into scientific notation, decrease the exponent if the number gets ___. larger
30800 in s.n. 3.08 x 10(4)
356 x 10(12) 3.56 x 10(14)
What are the parts of a lab report? purpose, procedure, results, class data, error analysis, discussion, conclusion
What is a property that depends on the amount and size of the sample Extensive Property
What is a property that does not depend on the amount of size of sample? Characteristic Property
Examples of Characteristic Properties Color, appearance, density
A and B are only made of the same substance if all of their ____ properties are the same. Characteristic
What concept explains that solids get bigger when heated? Thermal expansion of solids
FP of water 0 degrees C, 32 degrees F
BP of water 100 degrees C, 212 degrees F
Room temp 25 degrees C, 70 degrees F
Body temp 37 degrees C, 98.6 degrees F
What is characteristic if you stay at the same temperature? Density
Unlike solids and liquids, gases all basically expand ______. at the same rate
The___ increase during thermal expansion, so the ____ decreases because of the change. Volume; Density
Change from gas to solid deposition
change from solid to liquid melting
change from liquid to gas boiling/evaporation
change from solid to gas sublimation
change from solid to liquid freezing
change from gas to liquid condensation
what is an example of a material that sublimes under atmospheric conditions? dry ice
what is an example of deposition? The white frosty stuff that appears on the outside of a warm object that is put into a freezer
What substance sublimes under atmospheric pressure at a little above room temp? iodine
what do we call the salt in salt water? solute
what do we call the water in salt waiter? solvent
A solution is ____ when there is little solute compared to the solvent. diluted
A solution is ____ when there is lots of solute compared tot the solvent. saturated
What do we call the concentration of a saturated solution? solubility
Is solubility a characteristic property? yes
How do you find the concentration of a solution? mass of solute divided by volume of solvent
As the temp of a liquid increases, the solubility of a ____ also increases. solid
What do we call the raising of water temp by artificial means? thermal pollution of water
To ____ a mixture of substances, you have to identify some characteristics in which the substances differ, and "exploit" the difference in the characteristic to achieve the separation. separate
What do we call the property that makes something thick and immiscible? viscosity
What is the process of fractional distillation? boil and recondense vapor
What substances are soluble in water? sugar and citric acid
What substances are soluble in methanol? citric acid and moth flakes
What substances can be separated by fractional distillation? sodium chloride, sugar, sodium nitrate, potassium nitrate
Created by: suetholzm