Q&A - PSLE Science

[Sun_2010]

Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

[Sun_2010]

http://www.postimage.org/image.php?v=Tsxb3Bi



Just wanted to check on this question from 2009 Rosyth SA2 p6 (Q30)

Is The pollution caused by biodegradeable material considered a -ve impact of waste?

[mummyjoyce]

Sun_2010:

Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

1 is definately out; so best choice is 3

[ruyu]

Sun_2010:

Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

Yep checked it is 1

[ruyu]

Sun_2010:

http://www.postimage.org/image.php?v=Tsxb3Bi



Just wanted to check on this question from 2009 Rosyth SA2 p6 (Q30)

Is The pollution caused by biodegradeable material considered a -ve impact of waste?

Yeah it is.

[Tang]

mummyjoyce:

Sun_2010:

Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

1 is definately out; so best choice is 3

Hello,

A is the changed variable.

D is the result you measure (so cannot be kept constant.

So variables to be kept constant are B and C. Hence no correct answer provided.

[ruyu]

Tang:

mummyjoyce:

[quote=\"Sun_2010\"]Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

1 is definately out; so best choice is 3

Hello,

A is the changed variable.

D is the result you measure (so cannot be kept constant.

So variables to be kept constant are B and C. Hence no correct answer provided.[/quote]no it cant be b as they did not say that if the texture of the ramp affected the distance travelled by the ball. So you will have to change the length of the ramp. So the answer is 1.

[ruyu]

Tang:

mummyjoyce:

[quote=\"Sun_2010\"]Hi,


Just wanted to check on this question from 2009 Rosyth SA2 p6


http://www.postimage.org/image.php?v=PqaRCVS

The answer given is 1
I think it should be B and C ( there is no such option)

:?:

1 is definately out; so best choice is 3

Hello,

A is the changed variable.

D is the result you measure (so cannot be kept constant.

So variables to be kept constant are B and C. Hence no correct answer provided.[/quote]no it cant be b as they did not say that if the texture of the ramp affected the distance travelled by the ball. So you will have to change the length of the ramp. So the answer is 1.

[Nebbermind]

since you cannot change A (books) without changing (C) the position of the car, the only other thing u can change is B.


BTW, if u change A and keep B constant, both height of car and slope (angle) will change, therefore C will not hold.

[Muffins]

ruyu:

Tang:

[quote=\"mummyjoyce\"]
1 is definately out; so best choice is 3

Hello,

A is the changed variable.

D is the result you measure (so cannot be kept constant.

So variables to be kept constant are B and C. Hence no correct answer provided.

no it cant be b as they did not say that if the texture of the ramp affected the distance travelled by the ball. So you will have to change the length of the ramp. So the answer is 1.[/quote]Hi ruyu

Sorry to intrude, but the question actually states that we are looking for the slope of the ramp affects the experiment. The only way that the gradient, or slope, would be affected is if the number of books is changed, so the number of books cannot remain constant. If you follow that rule, then 1, 3 and 4 will automatically be eliminated. So the obvious answer would be 2. However, since the distance of the ball must be affected by the slope of the ramp, the most correct answer would be B and C, therefore classifying this question as incorrectly set... :celebrate: