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Working Scientifically

Do Now

What is this word?

Challenge: Do you know any types?

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Working Scientifically

Starter

Discuss what you know about working scientifically.

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Working Scientifically

Task 1

How do I design an experiment?

Challenge: How many different experiments could you think of?

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Variable: an element, feature, or factor that is liable to vary or change.

Working Scientifically

Task 1

What is a variable?

Independent Variable

Dependent Variable

Controlled Variable

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Working Scientifically

Task 1

What is a variable?

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The one variable that is changed (cause).

​

Working Scientifically

Task 1

What is the independent variable?

Independent Variable (IV):

John dropped a tennis ball from a height of 1m and measured how high the ball bounced. He repeated the experiment at 1.5m, 2m, 3.5m, 4m and 4.5m.

What is the independent variable?

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  1. Kelly placed milk, white and dark chocolate on the table outside and observed which type melted the fastest.
  2. Andy added marshmallows in fanta, cola and sprite and measured the time it took for them to dissolve fully
  3. Janice had 5 different sized ice cubes. She put them in the shade and measured how much time elapsed before they melted fully.
  4. Amber made 5 paper aeroplanes with different folding techniques for each. She measured the distance each flew.

Working Scientifically

Task 1

What is the independent variable in each of the following experiments?

Challenge: Can you think of an experiment?

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  • The one variable that is measured (effect)
  • Units should be displayed in (brackets) where possible

​

Working Scientifically

Task 1

What is the dependent variable?

Dependent Variable (DV):

John dropped a tennis ball from a height of 1m and measured how high the ball bounced. He repeated the experiment at 1.5m, 2m, 3.5m, 4m and 4.5m.

What is the dependent variable?

Challenge What do you call the units when they are no specific units for the dependent variables?

Arbitrary Units

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  1. Kelly placed milk, white and dark chocolate on the table outside and observed which type melted the fastest.
  2. Andy added marshmallows in fanta, cola and sprite and measured the time it took for them to dissolve fully
  3. Janice had 5 different sized ice cubes. She put them in the shade and measured how much time elapsed before they melted fully.
  4. Amber made 5 paper aeroplanes with different folding techniques for each. She measured the distance each flew.

Working Scientifically

Task 1

What is the dependent variable and appropriate units in each of the following experiments?

Challenge: Can you think of an experiment?

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  • The variables that are kept the same (usually 2 or more)
  • This makes the experiment fair = accurate

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Working Scientifically

Task 1

What is the independent variable?

Controlled Variable (CV):

John dropped a tennis ball from a height of 1m and measured how high the ball bounced. He repeated the experiment at 1.5m, 2m, 3.5m, 4m and 4.5m.

What are the controlled variables?

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Working Scientifically

Task 1

What are the controlled variables in each of the scenarios?

  1. Kelly placed milk, white and dark chocolate on the table outside and observed which type melted the fastest.
  2. Andy added marshmallows in fanta, cola and sprite and measured the time it took for them to dissolve fully
  3. Janice had 5 different sized ice cubes. She put them in the shade and measured how much time elapsed before they melted fully.
  4. Amber made 5 paper aeroplanes with different folding techniques for each. She measured the distance each flew.

What are the controlled variables?

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Working Scientifically

Checkpoint

https://create.kahoot.it/details/variables/3d2cf6df-5930-476b-b794-b2675b4b72f8

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Working Scientifically

Task 2

Design your own experiment

(IV):

(DV):

(CV):

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Challenge: How may variations of your experiment can you think of?

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Working Scientifically

Task 2

Discuss if you think this is fair?

(IV):

(DV):

(CV):

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Working Scientifically

Task 2

Discuss if you think this is fair?

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Working Scientifically

Task 2

Discuss if you think this is fair?

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An experiment can be more accurate by managing the controlled variables.

Accuracy

Task 3

How do you make an experiment accurate?

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Accurate

Task 3

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Working Scientifically

Task 2

Discuss if you think this is reliable?

9.95, 9.56, 9.64, 9.86, 9.90

48.91/5

9.782

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Working Scientifically

Task 2

Discuss if you think this is reliable?

9.95, 9.56, 45.6, 9.86, 9.90

39.27

9.8175

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R�A�A

Repeatable

Task 2

Challenge:

Why does Mufasa repeat his experiments?

eliable

nomaly

verage

Working Scientifically

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Find the average for the following sets of results

Task 2

Working Scientifically

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How many words can you make with

Do Now

Challenge: What does precise mean?

Precise

Precise measurements are ones in which there is very little spread about the mean value

Working Scientifically

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What one would you use to measure 6ml of water?

Starter

Challenge: Why?

Challenge: Can you think of something more precise?

Working Scientifically

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How much water is in this measuring cylinder?

Do Now

Challenge:

Working Scientifically

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What one would you use to measure 20kg of rice?

Starter

Challenge: why?

Working Scientifically

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Precise measurements is often the case that an instrument with smaller resolution (more sensitive measurement) will give more precise results.

Precise Measurements

Starter

Challenge: which set of scales is the most precise?

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Working Scientifically

Do Now

What are the 3 variables?

Independent Variable

Dependent Variable

Controlled Variable

Change

Measure

(units)

Same

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R�A�A

Repeatable

Task 2

Challenge:

Why does Mufasa repeat his experiments?

eliable

nomaly (a result that does not fit the trend)

verage

Working Scientifically

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How does this have to do with Science?

Do Now

Working Scientifically

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What are the principles of a great graph?

Do Now

Working Scientifically

S

L

A

P�T

​

CALE

- Even intervals

INE OF BEST FIT

Straight (with a ruler) or curved (free-hand). NOT dot to dot

XIS TITLES & (UNITS)

Axis labelled and titles have units in brackets

DV on Y-axis and IV on X-axis

LOTTING

Precise plotting using a cross (x)

ITLE

Descriptive title using variables if possible.

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76

140

228

299

What are the principles of a great graph?

Do Now

Working Scientifically

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What are the principles of a great graph?

Do Now

Working Scientifically

S

L

A

P�T

​

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Rules of Graphing

Do Now

Challenge:

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SLAPT

Do Now

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S

L

A

P�T

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Plot the following data

Task 2

Challenge:

Working Scientifically

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Peer Mark the graphs using the mark scheme

Peer Mark

Challenge:

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  1. State the results
  2. Explain why the results happened
  3. State any errors that occurred
  4. State why the errors occurred
  5. Suggest ways to eliminate the errors
  6. Suggest improvements to your method

How do you analyse your results?

Analysing Results

Challenge:

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1. How much rain fell in October?

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2. In which month did is not rain?

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3. How much rain fell in April?

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4. In which month did it rain the most?

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5. Estimate how much rain fell in the first 3 months of the year.

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Answers

  1. 40mm
  2. August
  3. 54 – 56 mm
  4. December
  5. 42 – 47 mm