Introduction To Science Flashcards
What are the parts of a Bunsen burner
Rubber hose Air hole Adjustable collar Barrel Stand Gas intake
What 3 ways can the air hole on a Bunsen burner be used
Open
Half open
Closed
Describe Bunsen flame with air hole closed
Yellow, sooty, flickery
Coolest flame, easily seen
Describe Bunsen flame, air hole half open
Blue, yellow tip
Nearly invisible, hot
Less sooty
Describe Bunsen flame with air hole open
Roars, blue with light blue cone
Hottest flame
Hottest part is tip of light blue cone
How is the hottest part of a flame found?
By assessing the red glow of a nichrome wire loop
3 Lab safety rules for personal clothing/appearance
Tieand tuck long hair
Secure loose clothing
Wear safety goggles
Lab safety rules to prevent falls
Stools under benches
Bags under benches
Tell teacher and clear spills
No running
How do you avoid breathing in dangerous substances
Don’t sniff unless teacher says
Work in fine cupboard for dangerous experiments
Why is food and drink not allowed in the lab
Would contaminate experiments
Could lead to ingesting a hazardous substance
What are the disposal rules in a lab
No solids in sink
No liquids in bin
Glass in a glass bin
Why do you stand for experiments
Easier to step away if something unexpected or dangerous occurs
What is
Chemistry
Biology
Physics
Chem - materials and uses
Bio - life and its processes
Phys- physical processes
How is length measured
With a ruler
Metres
Centimetres
Millimetres
How is volume measured
Length x breadth x height Beaker Conical flask Measuring cylinder Read bottom of meniscus ml or cm cubed L or cubic decimetre
How is mass measured
g or kg
Top pan balance
Remember Tare or zero button
How is temp measured
Degrees Celsius
Thermometer
Mercury (poison)
Coloured alcohol
3 kinds of variable in an experiment
Independent - scientist changes it
Dependent - scientist observes it for changes
Controlled - all the conditions the scientist keeps constant so they don’t affect the experiment
SAM
CID
Where do independent and dependent variables get charted on a graph
IXDY
Independent on X axis (horizontal)
Dependent on Y axis (vertical)
What do you call a second experiment used to see if same changes occur when nothing is done at all
A control experiment
What do scientists do
Make predictions Do experiments Observe and record results Analyse results Draw conclusions Present findings
What can we do to help see patterns or relationships in scientific results
Use charts and graphs Tally charts Numerical charts Line graphs Bar charts Maybe pie charts etc too
