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AQA Biology paper 1 Solved Questions
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AQA Biology paper 1 Solved Questions) (100% VERIFIED QUESTIONS AND ANSWERS
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TEST BANK FOR EGANS FUNDAMENTALS OFRESPIRATORY CARE 11TH EDITION BY
KACMARE
Three primary state of Matter are: Solids, Liquids, and Gases
Describe Solids: - Have high degree of internal order.
- Their atoms or molecules are limited to back and forth motion about a central position.
- Maintain their shape due to atoms are kept in place by strong mutual attractive forces, called
VAN DER WALLS forces.
- Solids are dense and cannot be compressed.
Describe Liquids: - Molecules have mutual attraction
- Forces are weaker than solids
- molecules can move freely, that is why they can take the shape of the container they are in.
- Liquid are dense and cannot be compressed.
Describe Gas: - Molecular force is very weak.
- lack restriction to their movement
- exhibit rapid, random motion with frequent collisions.
- Can flow easily
What is Potential Energy: - energy of position (in one place)
- this is result of strong attractive forces between molecules.
- most internal energy in solids, liquids is potential energy.
What is Kinetic Energy: - energy in motion
- internal energy in gases is kinetic.
Describe Absolute Zero: - temp. should exist at which there is no kinetic energy.
- the temp. is absolute zero
Temperature Scales: Kelvin (K)
Celsius (C)
Fahrenheit (F)
Convert Fahrenheit to Celsius: C= 5/9 (F-32)
Convert Celsius to Fahrenheit: F= (9/5 multiple by C) +32
Convert Celsius to Kelvin: K= C + 273
First Law of Thermodynamics: - energy can be neither created or destroyed, only
transformed in nature.
- energy gain by a substance = energy lost by surroundings.
U = E+W
U- internal energy of object
E- energy transferred from object
W- external work performed on object
Heat Transfer: - When two objects of different temperature coexist.
- Heat transfer from hotter object to cooler object until temperature equals.
Heat transfer affected in four ways: 1) conduction
2) convection
3) radiation
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