Karteikarten
Physics and chemistry I: matter & energy (introduction)
Karten in diesem Stapel (28)
- 1The universe can be described in terms ofMatter and energy
- 2The universe can be defined asAll that exists
- 3Matter characteristicsDimensions
Inertia
Gravity - 4Matter has dimensions meansThat it occupies space=has volume
- 5Matter has inertia meansIt continues stopped or moving until a force is applied
- 6Matter causes gravitational attraction meansBodies/material systems attract each others
- 7According to its limits, matter can be classified intoBodies or material systems
- 8Bodies areMatter with defined limits
- 9Material systems areMatter with undefined limits
- 10According to their size, bodies and material systemsGo from the microscopic to the macroscopic
(we call them scales of observation) - 11Multiples and submultiples in the International SystemTera 10¹²
Giga
Mega
Kilo 10³
Hecto
Deca
Unit 1
Deci
Centi
Mili 10-³
Micro
Nano
Pico 10-¹² - 12Matter is made up ofAtoms
- 13Atoms size isVery tiny, about 10-²º m
- 14Atoms of the same kind form aChemical element
- 15Atoms can form two types of substancesPure substances and mixtures
- 16Pure substances are characterized byHaving specific properties (like fussion,boiling point or density) and a constant chemical composition
- 17According to their composition, pure substances can beOne type of atoms: elements
Two or more types of atoms: compounds - 18Elements can be found in nature asAtomic elements
Molecular elements - 19In atomic elements, atoms can beFree atoms (as in Helium)
or joined atoms (atomic cristals, as in Iron) - 20We call molecular element to an element in whichAtoms of the same type are forming molecules of 2 or more atoms
- 21Compounds can be found in nature asMolecules (like water)
Ionic crystals (like Sodium chloride) - 22A change isany transformation that can be measured
- 23Change implies interaction between2 bodies
A body an a material system
2 material systems
A material system/body with itself - 24Any change implies an exchange ofEnergy
- 25Some changes imply an exchange ofmatter
- 26According to what they can exchange with their surroundings, material systems can be classified intoOpen systems: matter and energy
Closed systems: only energy
Isolated systems: neither matter nor energy - 27The way to transfer energy without trasferring matter isthrough waves
- 28Changes can be classified intoPhysical changes: change properties but no new substances are produced
Chemical changes: new substances are produced through a chemical reaction
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- E.S.O. Biología Fichas sobre Physics and chemistry, creado por technoeso el 19/03/2016.
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- Mónica Garrido
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