Nature Of Science

This post proposes the use of a key biological concept - broad classification - to teach the provisional and contested nature of science in school biology curricula. It also examines existing curriculum-related factors which might pose obstacles to implementing such a change. An investigation in South Africa highlights the problems regarding biological classification at the kingdom level of 50 biology students entering one university. Using interviews, questionnaires and document analysis, factors thought to affect learners' ideas were investigated, including the understanding of the changing and contested nature of scientific knowledge of a range of biology educators. The students lacked knowledge of the concept of a biological kingdom, and showed archaic thinking about the number of kingdoms. Many of the teachers held similar views, used outmoded classification systems in their teaching, and were unaware of the history of changes in biological systems. A review of two relevant syllabus and five textbooks revealed insufficient, inaccurate, inconsistent and/or contradictory information about biological classification systems and how they change with time. Three potential problems associated with curriculum innovation are discussed.

Air Purifiers

Guys, last two days was hectic with work and I was unable to give time for anything.When we buy a vehicle or a property, we would always check for the vehicle's condition, the genuineness of the seller, the documents etc. There are also essential things in life which are of greater importance and we are least bothered to check for its purity. For an instance, consider air, water, fire etc. There are companies like Aqua to enhance the purity of drinking water. You might ask me how does air be impure? Have you heard of air pollution? The air that comes out of vehicles, the dust that settles on your floor, the air that gets mixed up with the natural air, everything add to produce polluted air. We can never avoid stepping out as a preventive measure but we can always reduce and limit ourselves to stay away from polluted air. As I browsed through, I got to see a guide on ozone air purifiers. There are a lot of guidelines, ways and advices to stay away from polluted air. I understood a lot after surfing the site and specially got to know about the living air that is the air we breath in & out. There are various types and brands to look upon. Just stay safe and see to that the air or water you take in is pure.

26 Facts about GuYs!!!

1. Guys don't actually look after good-looking girls. They prefer neat and presentable girls.

2. When a guy says he doesn't understand you, it simply means you're not thinking the way he is.

3. Guys may be flirting around all day but before they go to sleep,
they always think about the girl they truly care about .

4. When a guy really likes you, he'll disregard all your bad
characteristics.

5. Guys go crazy over a girl's smile.

6. Guys will do anything just to get the girl's attention.

7. When you touch a guy's heart, there's no turning back.

8. When a girl says "no", a guy hears it as "try again tomorrow".
So TRUEJ

9. You have to tell a guy what you really want before he gets the
message clearly.

10. Guys love their moms.

11. A guy would sacrifice his money for lunch just to get you a couple of roses.

12. A guy often thinks about the girl who likes him. But this doesn't
mean that the guy likes her.

13. You can never understand him unless you listen to him.

14. If a guy tells you he loves you once in a lifetime. He does.

15. Like Eve, girls are guys' weaknesses.

16. Guys are very open about themselves.

17. Guys hate it when their clothes get dirty. Even a small dot.

18. Guys really admire girls that they like even if they're not that
much pretty.

19. If a guy tells you about his problems, he just needs someone to
listen to him. You don't need to give advice ... very true.

20. A usual act that proves that the guy likes you is when he teases
you.

21. Guys fantasies are unlimited.

22. Girls' height doesn't really matter to a guy but her weight
does! Ha ha… Very TRUE! J

23. Guys tend to get serious with their relationship and become too
possessive. So watch out girls!!!

24. Guys are more talkative than girls are especially when the topic is
about girls.

25. Guys hate girls who overreact.

26. If a guy says you're beautiful, that guy likes you.