How Science Works (9) Flashcards

0
Q

What is an independent variable

A

This is the value that I as the investigator changes.

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1
Q

What is a categoric variable

A

A categoric variable has no numerical value.

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2
Q

What is a dependant variable

A

This is the value that depends on the independent value.

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3
Q

What is a continuous variable

A

A continuous variable has a numerical value, e.g. Temperature, length, volume

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4
Q

How is a continuous variable plotted

A

As a line graph

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5
Q

How is a categoric variable plotted

A

As a bar chart

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6
Q

What is the difference between accuracy and precision

A
  • An accurate result is a correct result

* If your result if precise then if you take repeated tests, the results are all very close together.

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7
Q

What is reliability

A

If someone else can repeat your measurements and get the same results then your results are reliable

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8
Q

What is a hypothesis

A
  • A hypothesis is an educated guess about how things work.

* It is a statement NOT a question

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9
Q

When drawing a table, the independent variable needs to go on the ___ column

A

Left

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10
Q

When drawing tables the dependant variable should always go on the _____

A

Right

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11
Q

When should you draw a line graph

A

If the variable is a number e.g.

a continuous variable

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12
Q

When drawing a graph, the independent variable goes along the _ axis

A

It goes along the x axis

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13
Q

When drawing a graph, the dependant variable goes along the _ axis

A

Y

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14
Q

In the conclusion you either _____ the hypothesis or _____ it

A

In the conclusion you either REJECT the hypothesis or ACCEPT it

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15
Q

How to answer a question which asks you to create an experiment

A

Corms

C - change (what will be changed)
O - organism (which organism used)
R - repeat 3 times
M - measure (2 things preferably)
S - same (2 things preferably)