Measuring Notes Fill In The Blank

Mass

- how much ______________ something has

- like __________________ without gravity

- measured in _____________

- tools used to measure are  _________________________ and _____________________

Volume

- how much _________________ an object takes up

- measured in  ____________, ___________, ___________

- square objects- LxWxH with a ruler to determine volume

- irregular objects- find volume using ________________________________________

Density

- How tightly packed together the molecules are.

- the mass per unit _______________   of a substance.

Formulas

D=                                        M=                                        V=

Accuracy vs. Precision

Picture

-More Precise instruments have more __________________ after the decimal.

Measuring Errors-

        Parallax Error- reading from the ____________

        Meniscus- read from the bottom of the _______________

        Not making the last number a  ______________

DON’T FORGET THIS

                        _____________ = _____________ = _______________

                        All of these are the same thing!

Density of water = _____________  or  ______________  or _______________

So....  

If you have 10 grams of water, you have ___________________ of water

If you have 4,000 grams of water, you have ____________________ of water

Converting in the Metric System

_______          _______          _______          _______        _______          _______          _______

_______          _______          _______          _______        _______          _______          _______

                                                _______

        

                                                _______

                                                _______

_______          _______          _______          _______        _______          _______          _______

Sample Problems

1000 Km = ? m                                                    50g = ? Kg

57 mm = ? Hm                                             45.789 KL = ? mL

567 g = ? Kg                                                        6Hm = ? m

Scientific Notation

-Positive exponents make numbers much larger then 1

5 x 104  = ______________________

-Negative exponents make numbers much smaller then 1

5.6 x 10-6 = _____________________

Practice

5.6 x 105                                        100 000 000

7.8 x 10-5                                        45

1.004 x 108                                    0.000 000 000 000 04

Significant Figures Rules

1.  Sig Figs are used for measurements, so there should always be ________ included (although for simplicity, we will omit units on these examples)

2.  Any number (measurements) 1-9 is significant.  145.567 has ______ sig figs

3.  Any zero between is sig fig numbers are significant also.  1008.09 has ______ sig figs.

4.  All zeros at the end of a number (that doesn't have any decimals) are not sig figs.  They are just place holders.  45,500 has  _______ sig figs.

5.  Any zeros at the end of a number that has a decimal are significant.  45,500.  has ________ sig figs

6.  Zeros used as place holders, that are not a part of the measurement at the beginning of the number are not sig figs  0.000056 has ______ sig figs

7.  Any zero to the right of a 1-9 number and the right of the decimal are significant  0.0123000 has ______ sig figs.  148.0000 has ________ sig figs

Sig Fig Practice

1278.50  _____                        0.005789  _____                        3.47 _____

120 000  _____                            2.60  _____                             387465 _____

90027.00 _____                       542 000.   _____                    6  _____

0.0053567 _____                        2653008.0 _____                823.012 ____

670  _____                           42.050 _____

0.00730 _____                   0.147 _____

8.002 _____                           6271.91 _______

Rounding

Round all of the following to 3 significant figures

5.457= _________                                        0.0005769= ___________

4.53619 = ________                                     43.658= _____________

876 493= _________                                     120 000 =___________

Sig Fig Rules for Adding and Subtracting

Look at the number of spots after the decimal that each number in the problem has.  Your answer must have the same number of spots after the decimal as the number in your problem with the least.

4.8 + 9.55 = 14.35    or __________ with sig figs

278 - 3.75 = 274.25   or __________ with sig figs

Sig Fig Rules for Multiplying and Dividing

Count the number of total sig figs for each number.  your answer will only have the same number of sig figs as the number with the least in your problem.

4 x 7 = 28   or ________ with Sig Figs    

48.00/2.00= 24   or ________ with Sig Figs  

Practice

23.4 x 14 ______            0.005 - 0.0007= _________

7.895 + 3.4= ______        7.895 / 34 = __________

0.0945 x 1.47= _____        0.2 / 0.0005 =_______