Heat

Fill in the blanks with the correct answers.

     The instrument is shown in the picture is  _____________. It  has a small bore containing ____________________ liquid. This instrument is used to measure ___________. It is measured in degree __________. It the object gets hot, the temperature ____________. if the object gets cold, the temperature ____________. The standard unit for temperature is _________.

团结就是力量

当一只海龟遇到两条鱼，会发生什么事？

Like other reptiles, turtles lay eggs which are slightly soft and leathery. Large numbers of eggs are deposited in holes dug into mud or sand. They are then covered and left to incubate by themselves. 

谁是大赢家？

        有一天，一只蜈蚣在窝里爬行，突然迎面来了一只蜘蛛，结果会如何呢？

         请看一看就有答案。

Change of color

     Some chameleon species are able to change their skin coloration. different chameleon species are able to vary their colorationdan pattern through combinations of pink, blue, red, orange, green, black, brown, light blue, yellow,  and purple.

    Color change in chameleons has functions in social signaling, in reaction to temperature and other conditions, as well as in camouflage. The relative importance of these functions varies with the circumstances as well as the species.Color change signals as a chameleon"s physiological condition and intentions to other chameleons. chameleons tend to show darker colors when angered, or attempting to scare or intimidate others, while males show lighter, multi colored patterns when courting females.

process of chicken hatches

Dispersal of fruit and seeds

1. Fruits and seeds that are dispersed by water

                         

 Fruits and seeds that are dispersed by wind

3.Fruits and seeds that are dispersed by animals

                             

4 .Fruits and seeds that are dispersed by explosive mechanism

                    

Test yourself

Fill in the blanks with the correct words:

       kinetic    renewable       source

           wind       non-renewable    

1. An example of a source of renewable energy is the ________.
2. The Sun is the main ______ of energy.
3. The bouncing rubber ball has ______energy.
4. ________ energy can be replenished.
5. __________energy cannot be replenisher after it has been used up.