Study Guide For Exam

Intro To Physical Science

Safety Notes

For Every Lab



  • Goggles must be kept OVER YOUR EYES until Mr. Leeds says to put them away

**even if you are already finished and cleaned up**



  • Report ALL accidents/spills to Mr. Leeds immediately
  • Try you best to use common sense



In Case of Emergency

Nurse: ext: 2828


Safety Equipment in Classroom


  • Fire Extinguisher
  • Fire Blanket
  • Eye wash/shower



Chemicals


  • Never taste chemicals (even if they look yummy!)
  • Always WAFT liquids to detect odor
  • NEVER WAFT SOLIDS/POWDERS!
  • Avoid touching chemicals
  • Always wash hooves with soap and water after lab
  • If chemicals touch skin: flush skin with water for 1 minute AND notify Mr. Leeds


Glass


  • How glass and cold glass look the same
  • Never use chipped or broken glass
-tell Mr. Leeds and dispose of broken glass in proper trash



  • Never use force to remove or insert glass



Alcohol Burners


  • Roll up sleeves, put UP long hair, Not just pull back (or you cannot do the lab)
  • Never walk away from a lit burner
  • Never Point the open end of a hot test tube at yourself or somepony else
  • Do not look down into a test tube/beaker while it is being heated
  • Make sure burner is capped and flame is out when done



End of Experiment


  • CLEAN-UP AREA & MATERIALS COMPLETELY!!!! (Or you LOSE points)
  • Make certain that burner is out if one was used
  • Keep goggles on (over eyes) until Mr. Leeds says to put them away



Baking Soda Lab

Experimental Errors

  • Hole in the tubing- bottle wont fill with gas
  • don't clean stirring rod at beginning- contamination
  • stopper not snug- gas leaks

Single Pan Balance Notes

  1. Check the pan is clean and dry
  2. Always "zero" balance before each massing
  3. --Push all riders to (left)
  4. --Use adjustment knob if needed
  5. Never switch pans
  6. Pick up balance by red bar only
  7. Don't zero balance when done


Reaction in a Bag

Red Liquid

Phenol Red

-used as a PH indicator

-Below 7 turns yellow

-above 8 turns pink


Ph Scale

-measures acidity

-goes from 0-14

- 0-6 acid

-7-neutral

- 8-14- akaline


2 Solids

Calcium Chloride

-Acidic (mildly)

-hydro tropic : attracted to water


Uses: canned veggies (keeps them from getting mushy)

--Electrolyte in sports drinks

--flavors pickles


Sodium Bicarbonate

-Not Acidic


Uses:

  • Baking
  • cat litter
  • toothpaste
  • laundry detergent

Big image

Volume Lab

Experimental Errors

-sand sticks to the sides of the wet cylinder

-pour water into sand



Big image

1.6 Mass Notes

Beqa; ancient standard mass used in Egypt


-Earliest balance found in Egypt (approximately 7,000 years old)


Mass: standard unit grams (g)

--1 Kilogram (kg)= 1,000g

---1 kg= 2.2 pounds (lbs)

1.8 Notes

Penny Notes


Before 1982: 95% copper 5% zinc

After 1982: 2.5% copper 97.5% zinc----Computer Technology