If someone gives an imaginative explanation of a natural happening, that cannot be considered as science. The explanation needs to be validated through experiments or observations. So, scientific explanations must be supported by the information gathered through the process of systematic experiment or observation.
The units which require a combination of two or more units to find another measurement, is called derived unit. For example- the unit of area is the product of length and breadth. Here, the unit of area cannot be determined from only length or breadth. So, the unit of area is a derived unit.
We cannot get an accurate idea of anything by just guessing. Only by measuring it, we can judge the amount of something. The importance of measurements is very much important in our daily life. For example- if you are sick, you need to take your medicine in the correct amount to get the proper benefits … Read more
Objectives Bangladesh is a small but densely populated country located in South Asia. It possesses various natural resources. Its geographical location with the Ganga-Brahmaputra/ Ganges-Brahmaputra delta system and the Bay of Bengal is one of the reasons for the availability of country’s natural resources including fertile land, rivers, forests and minerals. The countr is renowned … Read more
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. Or, Staring from plant source the transfer of energy by eating and being eaten up by different animals, is known as food chain.
Habit and habitat: The member of the phylum porifera is commonly known as “Sponge’. Their distribution is worldwide i.e. they are found all over the world. Most of the species are marine. But some live in fresh water. Usually they live in colonies. General characteristics Simplest multicellular animal.Body wall with numerous pores. Through these pores … Read more
Learning Outcomes What is biodiversity Origin of biodiversity Nature of biodiversity Interrelationships of organisms How to measure biodiversity Biodiversity of Bangladesh Risks and remedies of biodiversity What is Biodiversity? The term biodiversity describes the great variety of life on Earth. Biodiversity refers to the variety of living things, including plants, animals, and microorganisms. We don’t … Read more
This section is to give you more information about science so you can know more about doing and understanding those things which make you ethical and prosperous. In the previous section, we saw that science is the word for human activity which produces being ethical and prosperous. This section is a more complete elaboration of … Read more