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HSChemistry1stQtr

Chem Quests 1-9

QuestionAnswer
Qualitative or Quantitative? The building is really tall. Qualitative
Qualitative or Quantitative? It takes a long time for me to ride my bike to the store. Qualitative
Qualitative or Quantitative? The river is 31.5 m deep. Quantitative
Qualitative or Quantitative? I live really far away. Qualitative
Qualitative or Quantitative? The cheese costs $4.25 per pound. Quantitative
Qualitative or Quantitative? It is 75 degrees outside today. Quantitative
What quantity is a meter (m)? length
What quantity is a kilogram (kg)? Mass
What quantity is a second (s)? Time
What quantity is Kelvin (K)? temperature
What quantity is Liter (L)? Volume
What quantity is a mole (mol)? Amount of substance
Mega (M) means.... million
Kilo (k) means... thousand
Deci (d) means... tenth
Centi (c) means... hundredth
Milli (m) means... thousandth
Micro (ยต) millionth
Nano (n) billionth
Pico (p) trillionth
One cm is equal to a) 0.001m b) 0.01m c) 1.0 m 0.01m because one cm is "one hundredth of a meter" and 0l01 m is the expression for "one hundredth of a meter".
When you multiply two numbers in scientific notation, you must _____ their exponents. add
When you divide two numbers, you must ________ the denominator's exponent from the numerator's exponent. subtract
Scientific notation can be a nice way of getting rid of the unnecessary _____in a number. zeroes
Zeroes at the beginning of a number are _______ significant. never
Zeros that are between two nonzero numbers are ______ significant always
21,500 meters = ____kilometers 21.5 kilometers
0.00582 meters = ____millimeters 5.82 millimeters
Zeros at the end of a number are not significant unless there is a _______ ______ in the number. decimal point
How do you round a number? 1)Count the number of ______ figures in each number. significant
How do you round a number? (continued) 2) Round your answer to the _____number of significant figures. least
A chemical change is any alteration that changes the _____of matter. identity
A physical change is any alteration that does not ____the identity of the matter. change
A _______change is any alteration that does not change the identity of the matter. physical
A _______change is any alteration that changes the identity of the matter chemical
Burning a paper is a _________change. chemical
Shredding paper is a ________ change. physical
dissolving salt in water is a ______change. physical (the salt and water are still there)
Passing electricity through water, changing it into hydrogen and oxygen is a _____change. chemical
Is it an element or a compound? sodium (Na) element
Is it an element or a compound? Water (h 20) compound
Is it an element or a compound? Hydrogen Peroxide (H2 02) compound
Is it an element or a compound? methane (C H4) compound
Is it an element or a compound? carbon (c) element
Is it an element or a compound? Oxygen (0) element
Is it an element or a compound? sodium chloride (NaCl) compound
Is it an element or a compound? carbon dioxide (C 02) compound
Is it an element or a compound? chlorine (Cl) element
Is it a pure substance or a mixture? sand mixture
Is it a pure substance or a mixture? Kool-aid mixture
Is it a pure substance or a mixture? salt pure substance
Is it a pure substance or a mixture? Hydrogen and Oxygen mixture
Is it a pure substance or a mixture? water pure substance
Is it a pure substance or a mixture? aluminum pure substance
Is it a pure substance or a mixture? carbon dioxide pure substance
Is it a pure substance or a mixture? sodium and chlorine mixture
Is it a pure substance or a mixture? salt water and sand Mixture
Is it a pure substance or a mixture? hydrogen pure substance
An element is... one single thing
a compound is... several different elements
a mixture is... several different elements mixed together
a pure substance is... the substance is made up of only one kind of particles, ie hydrogen or oxygen
Created by: margaretawarren