Question | Answer |
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 |