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Science > Measurment > Flashcards

Measurment Flashcards

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1
Q

What is length?

A

Length is the distance between 2 points

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2
Q

What is the SI unit for length?

A

Meters

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3
Q

What instruments do we use to measure length?

A

Opisometre,trundle wheel,ruler,metre stick, veneer calipers

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4
Q

What are the units?

A

Millimetres (mm) Centimeters (cm) meters (m) kilometres (km)

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5
Q

What is the function of veneer calipers?

A

To measure the diameter of a circular object e.g. coin

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6
Q

What is the function of a trundle wheel?

A

To measure a long curved line

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7
Q

What is the function of a opisometer?

A

To measure the length of a curved line for a short distance e.g. road on a map

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8
Q

What does accuracy mean?

A

How close a measured value is to it’s actual value

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9
Q

What could lead to errors in a measurement result?

A

Parallax error and zero error

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10
Q

What does parllax error mean?

A

reading the measurement from incorrect angle

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11
Q

What is a zero error?

A

When you don’t start at zero on a measurement instrument

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12
Q

How many mm are in a cm?

A

10

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13
Q

How many mm are in a m?

A

1000

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14
Q

How many cm are in a m?

A

100

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15
Q

How many m are in a km?

A

1000

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16
Q

How do you convert cm into M ?

A

Divide by 100

17
Q

How do you convert M to cm?

A

X by 100

18
Q

How do you convert km to m?

A

Multiply by 1000

19
Q

How do you convert M to km ?

A

Divide by 100

20
Q

How do you convert mm to m?

A

Divide by 1000

21
Q

How do you convert mm to m?

A

Multiple by 1000

22
Q

What is area?

A

The area of an object is the amount of surface inclosed within its lines

23
Q

How do you calculate area?

A

Multiple length by width

24
Q

How do you calculate the area of an irregular shape?

A

Trace the outline of the shape onto grid paper then count total boxes (each box is 1cm2, boxes less then have aren’t counted but over half is counted as 1cm2. Box half filled count as 0.5cm2

25
Q

What is volume?

A

Volume is the amount of space that an object takes up

26
Q

How do you read the meniscus?

A

You read it at eye level and below the meniscus

27
Q

How do you find the volume of an irregular object?

A

Length x width x height

28
Q

What are the instruments used to measure temperature and the SI for it?

A

Thermometer and degree Celsius

29
Q

What does a thermometer measure?

A

Temperature

30
Q

What instrument is used to measure mass and its SI unit?

A

Mass balance and KG

31
Q

What does a mass balance measure?

A

Mass

32
Q

What is the instrument that measures time and its SI unit?

A

Stop watch and seconds

33
Q

What does a stop watch measure?

A

Time

34
Q

What is persicion?

A

How close something is together

35
Q

What is accuracy?

A

How close you are to the target

Science (6 decks)

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