SCIENCE

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Background information Science 10  Chemistry, Physics, Biology, and Climate/Earth

Science 10  What to expect:  Lots of material  Quizzes, chapter exams and unit exams (at least one a week)  Labs

Science 10 Survival Guide  To survive and do well in Science 10, you must do the following:  Keep up with readings and assignments  Turn in assignments, labs, and projects on time (there are penalties)  Show up- don’t be late and don’t skip  Get to know each other and help each other out- you are each other’s best resources!  Get help- don’t wait until it’s too late  Ask questions and lots of them

Class Expectations  RESPECT  Respect for your fellow classmates  Respect for the learning environment and school  Respect for your teacher  Be in class and on time  Lates- wait outside until I get to the door- will owe me time!  Unexcused absences – lose make up privileges  No phones  Unless otherwise stated by teacher

Class Expectations  iPods  Privilege- may use ONLY during individual work (if disruptive, class loses privilege)  NOT during lecture, exams, group work etc  Food and water  If you make a mess clean it up.  Assignment late policy  Missed exams  Make up privilege for excused absences only

Homework Policy  If don’t finish work in class, will need to bring it home  NEED to take responsibility for own learning!

Evaluation  Activities, Labs  Chapter Tests  Unit Exams  Final Exam

Materials for Class  Science 10 – Addison-Wesley  Notebook  Pen or Pencil

Questions?

What is Science?  Thoughts?

Scientific Method  Before 1800’s scientists used little proof to back up their discoveries and beliefs  General public would believe them based on hearsay and assumptions  Because of the lack of scientific data, there was great difficulty in introducing new ideas that did not follow the norm of the day

Scientific Method  The steps that you will use and are used in laboratories are ones that are used by all modern scientists  Each step is important and plays a large role in verifying data and theories

Scientific Method – Steps:  Problem  Hypothesis  Experimental Design – Manipulated Variable, Responding Variable, Controlled Variables  Observations  Conclusion  Open-ended – new questions that arise from the investigation

Experimental Design - Variables  Manipulated Variable  Manipulated Variable (independent) – the variable that is directly manipulated, or changed, by the experimenter  Responding Variable  Responding Variable (dependent) – variable that responds to the manipulated variable (what we observe)  Controlled Variables  Controlled Variables – factors that remain exactly the same in each part of the experiment

Experimental Design - Variables  For each of the following statements, identify the MV and RV.  The number of pigs in a litter is determined by the weight of the mother pig.  Will the number of foxes in Kananaskis Country have any effect on the rabbit population?  The score on the final test depends on the number of skills attained.  More bushels of potatoes will be produced if the soil is fertilized more.

Experimental Design - Variables  Students pointed a flashlight at a screen in an investigation to determine if the distance from the light to the screen had any effect o the size of the illuminated area.  A study was done with rats to dee if the number of offspring born dead was affected by the number of minutes of exposure to X-rays on mother rats.  Five groups of rats are fed identical diets except for the amount of vit A that they receive. Each group gets a different amount. After 3 weeks on the diet, the rats are weighed to see if the amount of vit A affected their weight.

Experimental Design - Variables  Will the number of nails picked up by an electromagnet be increased if more batteries are put in the circuit?  The amount of algae growth in lakes seems to be directly related to the number of sacks of phosphate fertilizer sold by local merchants.  Six groups of children were used to see if the scores on their weekly spelling tests were affected by the number of minutes of spelling practice they had each day.

Experimental Design - Graphing

Experimental Design Example:  Problem:  Problem: Which variety of peanut butter cookies do people like best?  Variables:  Manipulated: type of extra ingredient added to basic recipe  Controlled: basic recipe as well as …  Responding:

LAB SAFETY Sec A1.1

Objectives  By the end of this lesson:  Students will identify and define WHMIS symbols  Students will interpret MSDS (Material Safety Data Sheets)  Students will identify other important safety procedures in laboratories

Lab Safety Olympics!!!  In this activity, we will be gaining points for our teams through four different events:  1) What’s Wrong with this Picture?  2) WHMIS Challenge

What’s Wrong with this Picture?  In teams of 3 or 4 you will use the lab safety rules to spot the safety violations in the picture  Your team will have 5 minutes to complete as many as possible  1 point/correct violation

WHMIS Challenge  In teams you will be shown WHMIS symbols on the screen  As a group, find the classification for the symbol before it moves onto the next! There will be 30 seconds for each symbol.  1 point/correct classification

WHMIS Challenge

WHMIS Symbols  See the following for more info:  bolsAndLabels.asp?ReportID= bolsAndLabels.asp?ReportID=24384

MSDS  Material Safety Data Sheet  contains information on the potential hazards (health, fire, reactivity and environmental) of the chemical  also contains information on the use, storage, handling and emergency procedures all related to the hazards  contains much more information about the material than the label

MSDS Activity  With your group, you will answer the questions on page 9  1 point/correct answer

Homework  Answer questions 1-8 on page 11