Observation/Inference
Scientific Method
Variables...
Measuring
Graphing
100
What do you use to make observations?
5 senses
100
What is an educated guess, or possible answer to a question, called?
hypothesis
100
Identify the independent variable:
Are Bounty paper towels more absorbent than generic paper towels?
Type of paper towel
100
What is the length of the blue pencil?
17.0 to 17.2cm
100
What kind of graph is this?
Bar graph
200
An observation that includes a number is considered what?
Quantitative
200
What do we call the group that does NOT receive a treatment?
control group
200
Imagine you want to see which type of fertiliser helps plants grow fastest, so you add a different brand of fertiliser to each plant and see how tall they grow.
What is the dependent variable?
How tall the plants grow
200
What is this mass?
290.2g
200
What is the dependent variable in this graph?
Number of people
300
An observation about a feature of something is called what?
Qualitative
300
Which is the variable that I change?
Independent
300
April and Harry wanted to find the best pen. They decided to put a few to the test and measure which pen type lasted the longest before running out. They each chose a pen, Harry a ballpoint pen and April a fountain pen. Both used their pen to write with at school from Monday morning, and by Wednesday, April’s had run out. They concluded that ballpoint pens were the best.
What is their independent variable?
Type of pen
300
What is the volume of the pink liquid?
25mL
300
What is the independent variable in this graph?
Time (months)
400
Make two (2) QUANTITATIVE observations and one (1) QUALITATIVE observation.
Quantitative: needs a number
Qualitative: any quality
400
Why do I need to record a procedure when I experiment?
So the experiment is repeatable and can be done again
400
April and Harry wanted to find the best pen. They decided to put a few to the test and measure which pen type lasted the longest before running out. They each chose a pen, Harry a ballpoint pen and April a fountain pen. Both used their pen to write with at school from Monday morning, and by Wednesday, April’s had run out. They concluded that ballpoint pens were the best.
What is one variable they needed to control?
How much they wrote with the pen
Which classes they used the pen for
Where the pen was stored
400
What is the length of the red pencil in mm?
80-82mm
400
When constructing a graph, give one example of an EVENLY SPACED axis
Any skip counting.
500
Make AN INFERENCE about the picture, and support with a "because"
RESULTS WILL VARY
500
In an experiment, after asking a question, what is the next step?
Take a guess!
Write a hypothesis
500
April and Harry wanted to find the best pen. They decided to put a few to the test and measure which pen type lasted the longest before running out. They each chose a pen, Harry a ballpoint pen and April a fountain pen. Both used their pen to write with at school from Monday morning, and by Wednesday, April’s had run out. They concluded that ballpoint pens were the best.
Was this a valid/reliable experiment? Give 2 reasons why you think so.
ANSWERS VARY
500
How do you find the volume of the rock?
water level (final) - water level (initial)
500
What does DRY MIX stand for?
Dependent (responding) on Y-AXIS
(manipulated) INDEPENDENT on X-AXIS