বই Solutions - প্রাথমিক - সংস্কৃতি 7

a road vehicle that has four wheels, an engine, and a small number of seats for people

গাড়ী

an electronic device that stores and processes data

কম্পিউটার

(biochemistry) a chemical substance that carries the genetic information, which is present in every cell and some viruses

ডিএনএ

a form of energy that is carried by wires, cables, etc. and is used for lighting, heating, driving machines, etc.

বিদ্যুৎ

(biology) the slow and gradual development of living things throughout the history of the earth

বিবর্তন

(physics) the universal force of attraction between any pair of objects with mass

পৃথিবীর মাধ্যাকর্ষণ

‌a global computer network that allows users around the world to communicate with each other and exchange information

ইন্টারনেট

an instrument that makes looking at tiny objects or organisms possible by enlarging them which is useful in scientific studies

অণুবীক্ষণ

a type of energy generated by splitting atoms to release their stored energy

পারমাণবিক শক্তি

any of variation of antibiotics obtained from Penicillium moulds and used to treat or prevent a wide range of bacterial infections

বীজঘ্ন পদার্থ

the act of reproducing something by pressing an ink-covered surface against paper

মুদ্রণ

a communication device used for talking to people who are far away and also have a similar device

টেলিফোন

a piece of equipment by which the far objects, particularly those in space, are made clearly visible

দূরবীন

an electronic device with a screen that receives television signals, on which we can watch programs

টিভি

a round object attached to a vehicle from its center, which allows a person can move the vehicle in different directions

চাকা

the activity of writing as a linguistic skill

লিখন

an image of the inside of a body created using X-rays

এক্সরে

a flying vehicle with fixed wings that moves people and goods from one place to another through sky

বিমান