Q&A - PSLE Science

[brastilava]

Hi, can someone help in following 2 questions:


Q1: Which of the following statements about the organism (a picture of a frog is shown) below are correct?

A: It has many cells of various shapes and sizes
B: It has cells which contain nuclei that pass hereditary materials down
It has different cells to carry out different functions
Cell division takes place as it grows
E: It has some cells that are surrounded by cellulose walls

(1) A,B and C only
(2) A,B and D only
(3) A,B,C and D only
(4) A,C,D and E only

Answer key: (2). I thought the answer shoud be (3) since C is true?

Q2: Stephanie counted the number of plants and animals in her garden. Her findings are shown below:

Plants that grow on the ground : 10
Plants that grow on trees : 7
Grasshoppers : 5
Lime Butterflies : 6
Caterpillars of Lime Butterflies : 8

Based on above, which of the following statements are definitely true?

A: There are at least 3 populations of animals
B: There are more plants than animals in Stephanie’s garden
There are at least 2 populations of plants
There is only one garden community

(1) A only
(2) B and C only
(3) C and D only
(4) A,C and D only

Answer key: (4). Should the answer be (3) since caterpillars of lime butterflies and lime butterflies should be counted as 1 population?

[Michaelia0816]

brastilava:

Hi, can someone help in following 2 questions:


Q1: Which of the following statements about the organism (a picture of a frog is shown) below are correct?

A: It has many cells of various shapes and sizes
B: It has cells which contain nuclei that pass hereditary materials down
It has different cells to carry out different functions
Cell division takes place as it grows
E: It has some cells that are surrounded by cellulose walls

(1) A,B and C only
(2) A,B and D only
(3) A,B,C and D only
(4) A,C,D and E only

Answer key: (2). I thought the answer shoud be (3) since C is true?

Q2: Stephanie counted the number of plants and animals in her garden. Her findings are shown below:

Plants that grow on the ground : 10
Plants that grow on trees : 7
Grasshoppers : 5
Lime Butterflies : 6
Caterpillars of Lime Butterflies : 8

Based on above, which of the following statements are definitely true?

A: There are at least 3 populations of animals
B: There are more plants than animals in Stephanie's garden
There are at least 2 populations of plants
There is only one garden community

(1) A only
(2) B and C only
(3) C and D only
(4) A,C and D only

Answer key: (4). Should the answer be (3) since caterpillars of lime butterflies and lime butterflies should be counted as 1 population?

Hi! Your answer is right actually, my answer is similar to yours.

[pertunia]

Can anyone explain how to count populations in this type of questions? Thanks.

[pertunia]

And also why answers (A) and (B) are incorrect?

Animals include insects too right? Pls enlighten me. Thanks.

[Happygolucky]

I have a question from 2011 Catholic High Prelim 2, question 41.

It came with a picture but I have no idea how to post picture. Nonetheless, the question is as follows:

Steve wanted to test the properties of water and air. He placed 2 balloons of the same types, one completely filled with air only and the other completely filled with water and placed them over a candle flame. He lit the candle and observed what happened.

he recorded the time take for the balloon to pop.
Set up A(the one filled with air): 2 sec
Set up B(the one filled with water): 200s

(a) What can you conclude about the property of water based on the experiment?(1 mark)
(b) Explain the difference in time taken for the balloons to pop.(2 marks)
State a variable that he must keep constant to conduct a fair test.(1 mark)

[jewelbox]

Hi, appreciate any help to ans the 2 qns related to magnet. Thanks. http://i45.tinypic.com/9bkhfd.jpg\">

[jewelbox]

here is the other one: http://i47.tinypic.com/dr94z.jpg\">

[kiasuaunt]

jewelbox:

here is the other one: http://i47.tinypic.com/dr94z.jpg\">

Hi - I hv the ans as it is my dd's school paper - the ans is 1.

[jewelbox]

thanks kiasuaunt, you are fast:)

[kiasuaunt]

jewelbox:

thanks kiasuaunt, you are fast:)

You r most welcome - is the other question from the same school ? I can search the ans for u if it is.