- How did you do on yesterday's quiz? What can you learn and remember from what you go wrong?
- What are the signs of a chemical change? In other words, how do we know when bonds break and new bonds form?
- What is so special about the metric system?
- What is the difference between precision and accuracy?
- How does that relate to the lab equipment?
Notes
- Signs of Chemical Change- gas formation/ solid formation(precipitate)
- new smell
- change in state
- different/new property
- ability to react with something change
- spontaneous change in temperature
- fizzing/bubbling
- new color
- emission of light(glowing)
- new texture
This all indicates the FORMATION OF SOMETHING NEW
Any of these signs can happen but they may not always be signifying a chemical change! It could just be a physical change! (i.e. food coloring. temperature change.)
-Precision vs. Accuracy
Accuracy: when you get close to the real answer
Precision: when all your measurements are constantly close to each other
** you CAN be precise without being accurate
** you CAN'T be truly accurate without being precise
-Metric Units & Conversions
- length: meter
- mass: gram Base Units
- volume: liter (meter^3= 1000 liters)
Kilo
x10
Hecto
x10
Deca
x10
Unit(meter, gram, liter)
x10
deci
x10
centi
x10
milli
**shift decimal to convert from one unit to the other
Reminders!
- Don't be afraid to go to the TCL for help!
They're more than happy to answer questions
help study for tests and quizzes
webassigns
- Tips: use your textbook! It's a good idea to look over material before Ms. Friedmann talks about it.
- Don't be afraid to email Ms. Friedmann with questions or concerns! But remember that Ms. Friedmann has her own life too!
- For those of you who haven't taken the quiz yet, make sure to take care of that!
NEXT SCRIBE: Elaine Sine
No comments:
Post a Comment