Review Sheet for the Midterm
For up to an additional 10 points on the exam, fill out the form on the last page as you study for the exam and present it to me when we take the exam.
Significant Figures/Digits
When data is measured, we must compose the number in such a way that indicates how accurate the instrument can measure.
ie: an instrument that can be used to measure a mass as 30.000g is more accurate than one that can do it as 30.0g.
How to count significant figures/digits – Follow the Atlantic Pacific rule
Practice: How many significant figures are in the following numbers?
1. 34345 = _________
2. 5.03 = _________
3. 420 = ________

Review Sheet for the Midterm
When we then use these numbers in arithmetic, the final product can only be expressed in line with the least significant figure. You may have to round the number to make it work.
How many significant figures need to be in the produce of:
1. 30 x 20.01 =
2. 0.002 divided by 10.34
Reading a Graduated Cylinder
Density - Density is a comparison between the mass of a substance and it’s volume.
Every pure substance has its own unique density that can be used to confirm its identity
At times you may have to use a graduated cylinder to determine the volume of an irregularly shaped substance.
D=M/V
What is the volume of the object in the graduated cylinder? ______
Calculate the density of the object if the mass is
6g. ________g/mL
% Error
Observed Value – Accepted Value
% Error = -------------------------------------------- x 100
PRACTICE PROBLEM
Accepted Value
Calculate the % Error of a measurement that should have been 5g, but instead was 50g.

Review Sheet for the Midterm
Instruments NAME THE INSTUMENTS AND WHAT THEY ARE USED FOR
Matter – Use the other review sheet for the bulk of this material
Particle Diagrams
Draw a particle diagram showing a pure compound in gas from
Draw a particle diagram showing a mixture of a
Diatomic element and a compound in solid form
In terms of particles state what happens when a solid substance absorbs energy.
The particles will _________________________
Is this endothermic or exothermic? _______________ Why?

Review Sheet for the Midterm
Atomic Theory
The way scientists view the atom has changed over time. Complete the chart below.
Which part of the atom is now better
Scientist Model The Experiment understood?
Illustration
JJ Thomson
Earnest Rutherford
Neils Bohr
X
The Modern Model
Wave Mechanical
Model
X
X

Review Sheet for the Midterm
Study Log
Name: ______________ Period: ______
Study Plan: How do I plan on studying for this exam?
Date of the Exam: _________
Identify dates, times and topics you plan on addressing
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
Date
_________________________________________________________________
Start time End time List things you understand better
List the resources used.

Review Sheet for the Midterm