读MTH第一本，儿子问了一个奇怪的问题，请求帮忙！
本帖最后由 janerrr 于 2013-4-7 15:03 编辑最近进入了MTH的的学习，其实也是试试看他目前是否合适学这个，第一本Dinosaurs Before Dark先给他裸听了5次左右，他说基本都听懂了，我们就进入看书阅读阶段。在裸听的时候很认真，没有什么问题提出来，估计一方面故事很吸引人，另外一方面恐龙这个主题是他非常感兴趣的，之前恐龙类的科普书有好几套都看过几遍了。但是在读的时候他突然问我一个问题，我还真没有办法回答，他说：“妈妈，在恐龙生活的白垩纪，好像还没有草出现，书中好多地方都有写到grass，fern在恐龙时期倒是很多。这是怎么回事？”我汗，百度了一下，普通小草属于被子植物，出现晚于裸子植物，被子植物最早也是在早白垩纪出现，不知道那时候有没有小草，都不记得他是在哪本科普书上看到恐龙时期还没有草出现的。大家有没有懂这个的，麻烦解答一下！ 本帖最后由 sandydad 于 2013-4-7 16:00 编辑
What did dinosaurs eat?
Some dinosaurs ate lizards, turtles, eggs, or early mammals. Some hunted other dinosaurs or scavenged dead animals. Most, however, ate plants (but not grass, which hadn't evolved yet). Rocks that contains dinosaur bones also contain fossil pollen and spores that indicate hundreds to thousands of types of plants existed during the Mesozoic Era. Many of these plants had edible leaves, including evergreen conifers (pine trees, redwoods, and their relatives), ferns, mosses, horsetail rushes, cycads, ginkos, and in the latter part of the dinosaur age flowering (fruiting) plants. Although the exact time of origin for flowering plants is still uncertain, the last of the dinosaurs certainly had fruit available to eat.
网上也有另一个说法, grass 是在白垩纪很后期才出现, 曾在恐龙粪便上找到 phytolith.
What did grass evlove ?
Because of its structural simplicity, you might think that grass evolved a very long time ago, along with the first plants. Interestingly, however, the fossil record shows this is not the case. Grass only shows up in the fossil record about 67 million years ago, in the form of phyoliths (small silica flecks in grass that make it difficult to digest) found in fossilizeddinosaur dung. Recently, it was thought that grass only evolved about 55 million years ago, becoming abundant after the Age of the Dinosaurs, which ended in a mass extinction 65 million years ago, but the phytolith finding refutes this.Land plants in general evolved during the Silurian, about 440 million years ago. These were simple mosses and lichens. All throughout the Mesozoic, dinosaurs consumed various plants, but didn't touch grass until it came into existence at the tail end of the period. If you consider the entire duration of land plants to correspond to an hour, grasses evolved in just the last nine minutes. However, today many ecosystems are dominated by grasslands, which are estimated to cover 20% of the Earth's land area, numerous animals live on grass, and members of the grass family are the most agriculturally and economically important plants in the world. 晕，不知道啊。 你们是自己阅读吗？直接英文？ 好厉害的孩子，英文不错呀 我有买了双语的，小朋友只愿意读前面的中文。不过配套的CD倒是英文的，可以听一听。
你家小朋友很厉害，居然找出个作者也忽略掉的问题。
就好比灰姑娘的故事里，午夜12点后所有的东西都会恢复原样，结果水晶鞋没有变回去，作者有时候也会犯错的呢。 这第一集是不三分多钟，每集都这个时间吗？我家的还听不太懂。 如果目的是提高英语，就不要太较真了，当童话看吧，本来科幻就是假的，孩子知道真相就行了……
太较真的话，啥也不用看了，我家小时候就问过，动物怎么可能讲话？所以，她很小就知道，故事就是故事。 这娃太厉害了。找找有没有关于这本书的论坛之类的，也许别人也提出过这个问题，或者鼓励他给作者写封信什么的。总之就是鼓励他参与到书的讨论中去。 可能grass还有其它意思，未必作草来解释。 很好的一次和孩子研究性学习的机会。 本帖最后由 tempax 于 2013-4-7 18:56 编辑
Dinosaurs had appetite for grass
A study of fossil dinosaur dung has for the first time confirmed that the ancient reptiles ate grass.
For more information, please access the following website:
http://news.bbc.co.uk/2/hi/science/nature/4443696.stm
Dung Fossils Suggest Dinosaurs Ate Grass
Ancient pieces of plant minerals have offered up the first evidence that dinosaurs ate grass, a new study says.
According to nationalgeographic:
http://news.nationalgeographic.com/news/2005/11/1118_051118_grass_dinos.html
文盲再次路过。。。 也许作者不了解这个细节，忽略了。 查了查字典，做名词，有草，有草地，有禾本科植物三个意思。我这个字典比较小。 本帖最后由 sandydad 于 2013-4-7 19:51 编辑
说到恐龙, 弄首歌上来听听
http://player.56.com/v_Njc5NTU1MDY.swf
Apatosaurus Brachiosaurus Corythosaurus Deinonychus EiniosaurusFabrosaurus Gal-limimus Hadrosaurus Iguanodon Jaxartosaurus Kentrosaurus Lambeosaurus Megalosaurus Nodosaurus Ornithomimus Parasaurolophus Qantassaurus Rhabdodon Stegosaurus Tyrannosaurus Ultraraptor Velociraptor Wannanosaurus Xenotarsosaurus Yangchuanosaurus Zigongosaurus 本帖最后由 lmjcle 于 2013-4-7 20:10 编辑
http://www.56.com/u81/v_NjUwNDUwMDY.html#fromoutpvid=NjUwNDUwMDY
这个也不错，搞搞气氛
sandydad 发表于 2013-4-7 19:45
说到恐龙, 弄首歌上来听听
呵呵，这歌词好，A-Z都有了。还可以学习自然拼音。 我们也在听MTH，现在1-4本重复听，今天把第一小节读了下来，但是有些单词意思还是不懂的。 The Cretaceous Period (144-65 Million Years Ago)
Plant Life The main innovation of the Cretaceous period was the evolution of flowering plants, which spread across the separating continents, along with thick forests and other kinds of dense, matted vegetation; this is also when grass first started to appear on the scene.
另一篇文章写的比较详细
Cretaceous Plants
http://www.kids-dinosaurs.com/cretaceous-plants.html
在这篇Cretaceous Period中，提到：
”Flowers and flowering trees and grasses got to be more and more common during the Cretaceous period, helped along by the evolution of bees that carried pollen from one flower to another, and by the end of the Cretaceous most of the plants on earth were flowering ones. In addition to the bees, a lot of other new kinds of insects developed, like ants, grasshoppers, and termites.“ MTH系列里确实有一些地方经不起推敲，以前看到有人把它当科普读物看，我还很困惑。可能作者是想尽可能多的给孩子介绍各方面的知识，面太广了，哪能做到？作者并非各个领域的专家，肯定有很多疏漏之处。这套书，只能用来激发孩子对某方面的兴趣，想要了解相关的知识，还是要找一些专业的科普书来看。 写故事的人不可能也同时是动植物学家吧，如果是fiction读物就不能太较真。当然孩子有那个兴趣就多找些专业的科普一起来研究研究。
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