yishun2009

Fiona2004 发表于 26-10-2013 11:03
借这个帖子再请教一个问题：我的理解是 GRASS IS A PLANT，BUT HAS A TWO－STAGE LIFE CYCLE AS it is no ...

用新式华语回答, 俺不懂。

一碰到这种科学的问题, 俺就抓瞎了, 生怕教错了孩子。一是英语不够用, 尤其是 terminology; 二是科学知识也忘了。

Fiona2004

yishun2009 发表于 26-10-2013 11:29
用新式华语回答, 俺不懂。

一碰到这种科学的问题, 俺就抓瞎了, 生怕教错了孩子。一是英语不够用, 尤其是 ...

小学科学确实是个伤脑筋的学科。我们等刀如水或其他家长来解答一下吧。我还有另外几道题。1。Is the following a example of how living thing responds to changes in the surronding? (A) The leaves and branches of a tree move when the wind blows.  2. Which one of the following statements about a plant is true? (A). The roots will provide food and water for the plant. (B) The seed leaves provide food for the developing seed.                   谢谢！

刀如水

Fiona2004 发表于 26-10-2013 11:03
借这个帖子再请教一个问题：我的理解是 GRASS IS A PLANT，BUT HAS A TWO－STAGE LIFE CYCLE AS it is not ...

我是这样理解的：

• Grass 是 flowering plant， 因此它的life cycle也是3-stages。大多数的植物都是flowering plants，还有一部分是non-flowering plant， 比如fern，moss和conifers。
• 绝大多数Flowering plants都有3-stages life cycle。
• Flowering plant的life cycles可以这样区分：1）Seed（不需要food）；2）Young plant或seedling （get food and nutrient from its seed leaves); 3)Adult plant (leave make food for plant )
  

刀如水

Fiona2004 发表于 26-10-2013 11:53
小学科学确实是个伤脑筋的学科。我们等刀如水或其他家长来解答一下吧。我还有另外几道题。1。Is the foll ...

1. Is the following a example of how living thing responds to changes in the surronding? (A) The leaves and branches of a tree move when the wind blows.

Answer: No.

2. Which one of the following statements about a plant is true? (A). The roots will provide food and water for the plant. (B) The seed leaves provide food for the developing seed.   

Answer:  (B).

yishun2009

刀如水 发表于 26-10-2013 15:19
1. Is the following a example of how living thing responds to changes in the surronding? (A) The l ...

刀兄厉害!

还好俺家公子的科学最强, 老师肿么讲, 他肿么说, 俺肿么听。他说的算!

刀如水

yishun2009 发表于 26-10-2013 16:07
刀兄厉害!

还好俺家公子的科学最强, 老师肿么讲, 他肿么说, 俺肿么听。他说的算! ...

过奖了。

我家老大上小学的时候我也没怎么管过他的学习；老二比较愚钝，没办法，只好自己上了。。。

Fiona2004

刀如水 发表于 26-10-2013 15:14
我是这样理解的：

谢谢! 你的答案应该是对的: Life Cycle of flowering plants comprises 3 stages (seed, young plang and adult plant). 我特地再看了课本.  不过我女儿学校2011年的考试题是大概是这样的:


Does organism have a three-stage life cycle? (yes) ---------------------------- Is organism a plant ?(yes)--------------A




Which of the following cannot be placed in Group A?


(A)   Mango tree
(B)  Grasshopper
(C)  Grass
(D) Damselfly


(1) A only
(2) B only
(3) A and C only
(4) B and D only
我女儿选了(3) 被批错了.

Fiona2004

刀如水 发表于 26-10-2013 15:19
1. Is the following a example of how living thing responds to changes in the surronding? (A) The l ...

谢谢! 第一题与我的理解一致. 因为 non-living things also move when the wind blows.

第二题, 我们原来的理解也跟你的一致, 可是又被老师批错了. 题目是这样的.


Which one of the following statements about a plant is true?

(1) The roots will provide food and water for the plant.
(2) The plant will only make food at the adult stage.
(3) The young plant will bear fruit before it bears flowers.
(4) The seed leaves provide food for the developing seed.

我女儿原来选的答案是(4), 被老师批错了. 老师也没给标准答案, 所以都不知道错在哪里.

刀如水

Fiona2004 发表于 26-10-2013 17:04
谢谢! 你的答案应该是对的: Life Cycle of flowering plants comprises 3 stages (seed, young plang and ...

答案应该是 (4) B and D only。

Fiona2004

刀如水 发表于 26-10-2013 21:26
答案应该是 (4) B and D only。

多谢！题目看错了。