1st Semester Exam Review

Slides:



Advertisements
Similar presentations
Lab equipment and Lab Safety
Advertisements

Lab Safety Contract (Slide 1) Students will act responsibly in the laboratory at all times. Running, horseplay, and pranks are unsafe and will result in.
Lab Equipment
Lab Safety, Variables and Graphing
Chemistry Laboratory 1- General Safety Rules 2- Chemical Safety 3- Glassware and Equipment.
Lab Safety. General Safety Rules 1. Listen to or read?. 2. When do you wear safety goggles? 3. What do you do if there is a spill or accident in the lab?
The Nature of Science: Unit 1A Safety, Equipment, and Measurement.
Accuracy vs. Precision For each target describe whether the marks are
Safety in the Chemistry Laboratory. What we have to learn to do, we learn by doing. -Aristotle.
The Nature of Science Objective 1
Chemistry Laboratory Safety Rules. Protect Your Eyes Appropriate eye protection must be worn at all times! Inform your teacher if you wear contact lenses.
SCIENCE LAB EQUIPMENT. Beaker Wide Mouthed Transport Storage Heating Not very accurate for measuring.
Safety Symbols, Equipment & Rules
Safety and Rules of the Lab
LAB SAFETY ORIENTATION Safety Means - - No Accidents.
Safety and Rules of the Lab
Lab Safety Grade 9 and 10 Science
Vocabulary Safety & Procedures. accident A ____ is unexpected and causes property damage or personal injury.
5th Grade MidYear Science Review
Power Point Jeopardy for Lab Safety
Lab Safety Safety Symbols Lab Equipment Variables.
Safety in the Laboratory. General Guidelines Conduct yourself in a responsible manner!! Follow all written and verbal instructions. Never work alone.
Safety and Rules of the Lab
The Scientific Method International System of Units (SI) LabToolsLabSafety Physical Science Basics Final Jeopardy.
2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt UNITS of Measure Lab Equipment FormulasMeasurement.
SAFETY IN THE CLASSROOM LAB. SAFETY IN THE CLASSROOM LAB.
Unit 1 Study Guide.
Practical General chemistry Dr.Gharam Ibrahim. A -Lecturer Dr. Gharam Ibrahim; Office: third floor,chemistry department B -Instructors in the Laboratory:
Lab Safety. When working in the Laboratory …. Tie back loose clothing Do Not wear open- toed shoes Wear goggles.
1 st Semester Exam Review Lab Equipment Watch glass Test tubes Beakers Erlenmeyer flaskGraduated cylinder Triple beam balance.
Science Safety Rules! You must score 90 or above before you may participate in the laboratory science activities. If labs occur before your completion.
Chemistry Laboratory Safety Rules. Protect Your Eyes Appropriate eye protection must be worn at all times! Inform your teacher if you wear contact lenses.
Lab Safety Review 1.When should you read and study the lab procedures you are about to perform? ans: before the day of the lab 2. What is the safety precautions.
1 st Six Weeks Review TEKS CHECK #1. Conclusion: Hearing aids are an effective way to treat hearing loss. A study was conducted to test the effectiveness.
Goggles Use: –Protect eyes during lab experiments –Must be worn if any chemicals or glassware are used.
Safety and Rules of the Lab
Common Equipment Used In Science Class EquipmentPicture/DiagramUse Tongs Retrieving something really hot or cold Mortar and Pestle Mixing and grinding.
Know safety symbols They will alert you to possible dangers They will remind you to work carefully.
The Nature of Science: Unit 1A Safety, Safety Symbols and Measurement.
Lab Equipment August 31, 2015.
Scientific Methods Test Grading and Answer Key. 1. Why is proper communication so important in science? Safety Sharing/Collaboration Clarification Consistency.
Please complete Bellringer on your desk.
LAB SAFETY REVEIW PAY VERY CLOSE ATTENTION. Approved eye protection devices (like goggles) are used in the laboratory… A) to avoid eye strain B) to wear.
Earth Science Unit I “Safety, Metric Measurements and Scientific Inquiry.
Lab Safety Rules. Safety Symbols Know safety symbols They appear in your laboratory activities They will alert you to possible dangers They will remind.
Safety and Rules of the Lab
Miss Fogg Cloverdale High School Be safe Work hard Show respect.
Lab Safety General Guidelines No food or drink at any timeNo food or drink at any time Never work aloneNever work alone Follow all teacher instructionsFollow.
The Scientific Method International System of Units (SI) LabToolsLabSafety Physical Science Basics Final Jeopardy.
By following safety rules in the lab, you will help keep both yourself and others safe. Safety Rules.
Laboratory Safety Rules SAFETY IN THE SCIENCE LABORATORY Ms. Rizzacasa Biology/AP Biology.
Lab Equipment. Glassware and Equipment Bunsen Burner Produces single open gas flame. Used for sterilization, heating and combustion.
MeM&feature=player_detailpage Lab Safety Rules.
Scientific Methods & Inquiry.  A body of knowledge and an organized method used to gain knowledge about the observable universe.  Scientific knowledge.
Chemistry Laboratory Safety Rules. Protect Your Eyes Appropriate eye protection must be worn at all times! I will mark down your labs if you are not wearing.
Introduction to Chemistry Chapters 1 & 2. Unit 1 Laboratory Management: pg in textbook Experiments are designed for students to learn chemistry.
Midterm review.
6th Grade Midterm Study Guide
Laboratory Equipment and Safety
SAFE LABORATORY PRACTICES
Lab Equipment
SAFE LABORATORY PRACTICES
MOST COMMON ON TAKS TEST
Introduction to Science
MeM&feature=player_detailpage
Laboratory Safety & Laboratory Equipment
Jeopardy Lab Safety Lab Equipment Safety Symbols
MeM&feature=player_detailpage
Safety and Rules of the Lab
Presentation transcript:

1st Semester Exam Review

Lab Equipment Test tubes Watch glass Beakers Erlenmeyer flask Graduated cylinder Triple beam balance

Lab Equipment Which of the following measure volume?

Lab Equipment First read the liquid at eye level Measuring Volume First read the liquid at eye level Second, read the volume at the curve of the meniscus.

MEASUREMENTS What is this measuring device called? What is it used to measure? What is the curved line called? What is the measurement? Which is more precise: a graduated cylinder or a beaker? Why? Graduated Cylinder Volume of liquids Meniscus 50 .0 mL Graduated cylinder is more precise because it measures in smaller intervals.

Lab Equipment Which of the following measure mass?

MEASUREMENTS 1. What is this measuring device called? _______________ 2. What is it used to measure? _________________ 3. What is the measurement below? ___________ 4. What are the correct units? ________________ Triple Beam Balance Mass of solids 365.4 grams Grams (g)

Precision vs Accuracy What is precision? What is accuracy? Precision indicates how close together or how repeatable the results are. A precise measuring instrument will give very nearly the same result each time it is used. What is accuracy? Accuracy indicates how close a measurement is to the accepted value. For example, we'd expect a balance to read 100.00 grams if we placed a standard100.00 g weight on the balance. If it does not, then the balance is inaccurate.

Which of the following is more precise? Why? MEASUREMENTS Which of the following is more precise? Why? The first one is more precise because it measures in smaller intervals.

A student measured the length of a piece of string that was 64 A student measured the length of a piece of string that was 64.34 cm long. Her measurements were 64.32 cm, 64.34 cm, 64.35 cm, and 64.34 cm. Which of the following statements is true? The measurements were accurate but not precise. The measurements were precise but not accurate. The measurements were both precise and accurate. The measurements were neither accurate nor precise.

Lab Safety General guidelines Safety first! Your main responsibility in lab is to prevent injuries of yourself and your partners!! Never work alone. Always read the directions before starting the lab. Know where all safety equipment is located and emergency contact numbers. No eating and drinking in lab (or tasting the chemicals!) Report ALL accidents to teacher.

Lab Safety continued…. Eye protection and Clothing Before starting lab, tie back long hair, roll up sleeves. Put on any protective equipment that teacher requires: Ex: apron, lab coat, goggles, gloves, closed-toe shoes, etc.) Always wear approved GOGGLES while in lab…**even if you are NOT conducting an experiment at the time. No contact lenses in lab The eyewash is available to rinse out hazardous chemicals in the eye.

Disposal Safety AVOID HAZARDS Use caution when handling hot glassware. When diluting acid, always add acid slowly to water. Never add water to acid. Always read the directions or consult your MSDS when disposing chemicals!!

During a lab activity, isopropyl alcohol is splashed into a student’s eyes. What should the student do? A Run to the nurse’s office B Put on safety goggles C Flush eyes with water D Wipe eyes with a cloth

Scientific Method How many

Data Trends How many students do you predict will have a cell phone by the year 2009? 15 thousand 18 thousand 19 thousand 20 thousand

What is a hypothesis? Hypothesis A hypothesis is an educated guess that can be tested by experimentation.

Theory What is a theory? An explanation of things or events based on many observations. Can it be changed? YES!! It can be changed as new data uncovers new information.

Which statement is true about a theory? A. A theory can not be changed according to new data. B. A theory does not have to be repeated, because it based on only one observation. C. A theory is an explanation of things and events based on many observations. D. A theory is can never become a law.

Units: meters per sec (m/s) Speed is how fast you are going. Units: meters per sec (m/s)

Position vs time graph The position vs time graph shows where things are at different times Speed is the slope of the position vs time graph

5 secs 275 m 150m / 5 sec =30 m/sec speed

time position 14 m 14 m / 4 sec = 3.5 m/s speed

speed B A

Acceleration & Momentum

What is acceleration? rate at which speed changes Rate of change means the ratio of the amount of change divided by how much time it took to change What is acceleration?

vf – vi t Formula Unit Units of cm/sec2 or m/sec2 2nd velocity 1st velocity vf – vi t time Units of cm/sec2 or m/sec2

Positive acceleration (speeding up) Deceleration (slowing down) Zero acceleration (constant speed)

Acceleration is the slope of the speed vs. time graph DON’T WRITE