Table of contents (expand)
7 Matter
Matter is anything that occupies space, possesses mass and can be perceived by our sense organs. It exists in nature in three, usually inter convertible physical states: solids, liquids and gases. For instance, ice, water and steam are respectively the solid, liquid and gaseous states of water. Things in the physical world are made up of a relatively small number of basic materials combined in various ways. The physical material of which everything that we can see or touch is made is matter. Matter exists in three different states: solid, liquid and gaseous. Human senses with the help of tools allow us to determine the properties of matter. Matter can undergo a variety of changes - physical and chemical, natural and controlled.
Chemistry and physics deal with the study of matter, its properties, changes and transformation with energy. There are two kinds of properties: physical - color, taste, odour, density, hardness, solubility and ability to conduct electricity and heat; in solids the shape of their crystals is significant, freezing and boiling points of liquids.
Chemical properties are the changes in composition undergone by a substance when it is subject to various conditions. The various changes may be physical and chemical. The physical properties are temporary. In a chemical change the composition of the substance is changed and new products are formed. Chemical properties are permanent.
It is useful to classify materials as solid, liquid or gas (though water, for example, exists as solid (ice), as liquid (water) and as gas (water vapor). The changes of state described by the terms solidify (freeze ), liquify (melt), va-pourise (evaporate) and condense are examples of physical changes. After physical change there is still the same material. Water is water whether it is solid, liquid or gas. Also, there is still the same mass of material. It is usually easy to reverse a physical change.
new words
matter - matter
mass - mass
sense - feeling
organ - organ
steam - steam
to undergo - to expose
variety - diversity
change - change
physical - physical
chemical - chemical
natural - natural
transformation - transformation
color - color
taste - taste
odour - smell
density - density
hardness - hardness
solubility - solubility
ability - ability
to conduct - conduct
permanent - permanent
Author: Elena Belikova
<< Back: cutaneous appendages
>> Forward: skeletal system
We recommend interesting articles Section Lecture notes, cheat sheets:
▪ Control and revision. Lecture notes
▪ Teria of the organization. Crib
▪ Eye diseases. Lecture notes
See other articles Section Lecture notes, cheat sheets.
Read and write useful comments on this article.
<< Back
Latest news of science and technology, new electronics:
The existence of an entropy rule for quantum entanglement has been proven
09.05.2024
Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>
Mini air conditioner Sony Reon Pocket 5
09.05.2024
Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>
Energy from space for Starship
08.05.2024
Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>
Random news from the Archive Freescale expands range of automotive microcontrollers
11.05.2008
Freescale Semiconductor has expanded its popular 8-bit microcontroller (MCU) S08SG family.
The new models S08SG16 and S08SG32 are flexible general purpose MCUs primarily for the automotive industry: LIN nodes, mirror control modules, power windows, battery management systems, climate control, heated seats, etc.
Operating at frequencies up to 40 MHz and with 16 or 32 kB of flash memory, the S08SG16/32 MCUs "push the performance envelope of an XNUMX-bit device," the company says. The presence of integrated timers makes them well suited for motor control circuits. In addition, these microcontrollers make it possible to simplify the development of LIN systems due to the built-in serial communications interface (SCI).
The devices also include voltage regulator circuits, input-output multiplexers, analog-to-digital converters. The high degree of integration of the S08SG16/32 helps to reduce the complexity, size and cost of structures, and to abandon many external components.
|
Other interesting news:
▪ Friday Lock smart door lock
▪ E-book with a color screen PocketBook InkPad Color
▪ New ATX specification from Intel
▪ Super glue for broken bones
▪ Steering wheel with grip sensor for robotic vehicles
News feed of science and technology, new electronics
Interesting materials of the Free Technical Library:
▪ section of the site Cultivated and wild plants. Article selection
▪ article My Leuctra and Mantineus. Popular expression
▪ article What is a 17-year-old locust? Detailed answer
▪ article Susak umbrella. Legends, cultivation, methods of application
▪ article Water detector. Encyclopedia of radio electronics and electrical engineering
▪ article Simple switching power supply, 220/5 volts 4 amps. Encyclopedia of radio electronics and electrical engineering
Leave your comment on this article:
All languages of this page
Home page | Library | Articles | Website map | Site Reviews
www.diagram.com.ua
2000-2024