Q&A - PSLE Science

[NYPS]

Can sby :please: give me the meanings for:


Changed variable
Independent variable
Controlled variable

[Oldschool]

NYPS:

Can sby :please: give me the meanings for:


Changed variable
Independent variable
Controlled variable

Hi,

Generally,

Independent variables –> A variables that is changed or tested.
Changed variables -> A variable that is affected by the Independent variables. Usually, it is also the variable that is measured.
Controlled variables -> Variables that are kept constant so as to achieve a fair test.

For example, the following test,
http://i43.tinypic.com/rmqph1.jpg\">
(taken from post @ http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=960101#p960101 )

Independent variables -> The different materials A to D.
Changed variables -> Temperature of the material under illumination
Controlled variables -> Intensity of light, the distance, surface and surface area of the material, etc.

Regards

[GDragon]

Oldschool:

NYPS:

Can sby :please: give me the meanings for:


Changed variable
Independent variable
Controlled variable

Hi,

Generally,

Independent variables –> A variables that is changed or tested.
Changed variables -> A variable that is affected by the Independent variables. Usually, it is also the variable that is measured.
Controlled variables -> Variables that are kept constant so as to achieve a fair test.

For example, the following test,
http://i43.tinypic.com/rmqph1.jpg\">
(taken from post @ http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=960101#p960101 )

Independent variables -> The different materials A to D.
Changed variables -> Temperature of the material under illumination
Controlled variables -> Intensity of light, the distance, surface and surface area of the material, etc.

Regards

:thankyou: :udaman:

[kiasuparentsirock]

How do you do this?


A farmer living alongside a river had a farm with cows gazing on the field. Further down the river was an industrial area. On the left of the river, the land was fertile with well-grown trees and leafy grasses. The land on the opposite side of the river was barren and brown with hardly any vegetation.

Give two reasons why the land on the left of the river was more fertile than the land on the right of the river.

[ngl2010]

kiasuparentsirock:

How do you do this?


A farmer living alongside a river had a farm with cows gazing on the field. Further down the river was an industrial area. On the left of the river, the land was fertile with well-grown trees and leafy grasses. The land on the opposite side of the river was barren and brown with hardly any vegetation.

Give two reasons why the land on the left of the river was more fertile than the land on the right of the river.

I like your Avatar. Sorry :offtopic:

[kiasuparentsirock]

ngl2010:

kiasuparentsirock:

How do you do this?


A farmer living alongside a river had a farm with cows gazing on the field. Further down the river was an industrial area. On the left of the river, the land was fertile with well-grown trees and leafy grasses. The land on the opposite side of the river was barren and brown with hardly any vegetation.

Give two reasons why the land on the left of the river was more fertile than the land on the right of the river.

I like your Avatar. Sorry :offtopic:

[kiasuparentsirock]

How do you do this?


Marianne placed 2 glass jars, X and Y, in the sun. She put a thermometer in each jar so that she could read the temperature of the air in the glass jars. Then, she covered Y with a lid.

The lid in Y caused the temperature in both jars to be different. Explain How.

In what way does the above set up similar the greenhouse effect?

[ngl2010]

My son is weak on Forces topic. Do you know any experiment that we can do to reinforce his understanding on Forces?


TIA

[kiasuparentsirock]

ngl2010:

My son is weak on Forces topic. Do you know any experiment that we can do to reinforce his understanding on Forces?


TIA

Here are some websites with experiments on forces :
http://www.qldscienceteachers.com/junior-science/physics/experiments/forces
http://www.monstersciences.com/forces-science-experiments.html
http://www.sciencekids.co.nz/gamesactivities/forcesinaction.html%E2%80%8E
http://www.hometrainingtools.com/force-table-kit/p/MC-FORCTAB/%E2%80%8E

[ngl2010]

kiasuparentsirock:

ngl2010:

My son is weak on Forces topic. Do you know any experiment that we can do to reinforce his understanding on Forces?


TIA

Here are some websites with experiments on forces :
http://www.qldscienceteachers.com/junior-science/physics/experiments/forces
http://www.monstersciences.com/forces-science-experiments.html
http://www.sciencekids.co.nz/gamesactivities/forcesinaction.html%E2%80%8E
http://www.hometrainingtools.com/force-table-kit/p/MC-FORCTAB/%E2%80%8E

Thank you.
:thankyou: