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Question 1

Independent variable is the?

Answer 1

Changed variable

Question 2

Dependent variable is the?

Answer 2

Measured variable

Question 3

Qualitative data is data collected based on ?

Answer 3

observations made using our five senses

Question 4

Quantitative data is data collected using?

Answer 4

instruments that gives us numerical values

Question 5

Accurate measurement is a measurement that is ?

Answer 5

close to the true value

Question 6

Precise measurement is ?

Answer 6

how close the agreement is between repeated measurements

Question 7

Reliable data has data values which are ?

Answer 7

precise

Question 8

Valid data has data values which are?

Answer 8

accurate

Question 9

Zero error is?

Answer 9

condition where a measuring instruments registers a reading when there should not be any reading

Question 10

what is Positive zero error?

Answer 10

shows a positive reading even when it is not in use

Question 11

what is Negative zero error?

Answer 11

shows a negative reading even when it is not in use

Question 12

Parallax error is?

Answer 12

occurs when the eye is being positioned at an angle to the measurement markings.

Question 13

what is Systematic error?

Answer 13

consistent, repeatable error due to faulty equipment or flawed experiment design.

Question 14

how can Systematic error be avoided?

Answer 14

by using well-maintained equipment.

Question 15

Random error, compared to systematic error, is?

Answer 15

unpredictable

Question 16

Random error can be reduced by?

Answer 16

taking repeated measurements

Question 17

waht type of error is Zero error?

Answer 17

Zero error is a systematic error.

Question 18

what type of error is Parallax error?

Answer 18

Parallax error is a systematic error.

Question 19

what type of error is Human error?

Answer 19

Human error is a random error.

Question 20

what is a best fit line?

Answer 20

The best fit line is a line that passes through most of the points.

Question 21

what can best fit lines identify?

Answer 21

Best fit lines can help to identify an anomolous measurement

Question 22

function of retort stand?

Answer 22

Retort stand holds and supports apparatus

Question 23

function of round-bottomed flask?

Answer 23

Round-bottom flask contains and heats substances

Question 24

function of bunsen burner?

Answer 24

Bunsen burner provides flames for heating substances

Question 25

function of delivery tube?

Answer 25

Delivery tube guides gasses from one container to next

Question 26

function of gas jar?

Answer 26

Gas jar collects gas

Question 27

function of crucible?

Answer 27

Crucible contains small amount of solid for strong heating

Question 28

function of pipe clay triangle?

Answer 28

Pipe clay triangle to support crucible on tripod stand

Question 29

function of tripod stand?

Answer 29

Tripod stand raises a container to a suitable height for heating by a Burning flame

Question 30

function of glass rod?

Answer 30

Glass rod stir liquids

Question 31

function of beaker?

Answer 31

Beaker contain liquids for heating

Question 32

function of filter funnel?

Answer 32

Filter funnel to be used with filter paper during filtration

Question 33

characteristics of non-luminous flame?

Answer 33

Non-luminous flame is hotter, bluer, smaller and is produced when the air hole is large.

Question 34

characteristics of luminous flame?

Answer 34

A luminous flame is less hot, brighter, larger and is produced when the air hole is small.

Question 35

advantages and disadvantages of fuels?

Answer 35

Fuels are a source of energy for vehicles and produce energy . But, combustion of fuels releases greenhouse gasses and air pollutants which cause air pollution and global warming.