Chemistry Cambridge IGCSE 0971/0620 Assessment 2nd Edition Revision Guide
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Questions and Answers

What does Hazel specialize in helping students with?

Hazel is responsible for helping hundreds of thousands of students achieve their dream results in their GCSEs, IGCSEs, A Levels, and IB examinations.

What subjects did Martin specialize in while at Cambridge?

Martin specialized in pathology, biological anthropology, chemistry, maths, geology, and history & philosophy of science.

What type of revision materials did Hazel and Martin create and publish?

They create and edit numerous science revision videos, write and publish The Perfect Answer GCSE, IGCSE and A-level revision guides & workbooks, and run the SwH Learning revision courses.

What is the highest level of examinations that Hazel helps students achieve results in?

<p>Hazel helps students achieve their dream results in their IB examinations.</p> Signup and view all the answers

What does Martin have thousands of hours of experience in?

<p>Martin has thousands of hours of experience tutoring students of all abilities, from GCSE up to degree level.</p> Signup and view all the answers

What did Hazel graduate with from University of Cambridge?

<p>Hazel graduated with a degree in Pre-Clinical Veterinary Sciences from St. John’s College, University of Cambridge.</p> Signup and view all the answers

What courses do Hazel and Martin run?

<p>They run the SwH Learning revision courses.</p> Signup and view all the answers

What did Martin graduate with from University of Cambridge?

<p>Martin graduated with a degree in Natural Sciences from Trinity College, University of Cambridge.</p> Signup and view all the answers

What subjects did Martin study at Cambridge?

<p>Martin studied chemistry, maths, geology, and history &amp; philosophy of science while at Cambridge.</p> Signup and view all the answers

What happens when liquid water boils to form water vapor?

<p>Particles gain kinetic energy, move further apart, move quicker and more randomly.</p> Signup and view all the answers

What happens when liquid water cools to form ice?

<p>Particles lose kinetic energy, move closer together, move slower and less randomly.</p> Signup and view all the answers

What happens when ice melts to form liquid water?

<p>Particles gain kinetic energy and vibrate more, move further apart as forces of attraction are overcome, move quicker and more randomly.</p> Signup and view all the answers

How does evaporation occur?

<p>Particles in liquid have differing amounts of energy, particles with the greatest amount of kinetic energy break away from the surface of the liquid, average kinetic energy of remaining particles is lowered.</p> Signup and view all the answers

What happens to the volume of a gas when its temperature increases?

<p>Volume of gas increases.</p> Signup and view all the answers

Use kinetic theory to explain why the volume of a gas increases when temperature increases.

<p>Particles gain kinetic energy, move quicker and more randomly, move further apart.</p> Signup and view all the answers

What happens to the pressure of a gas in a container when its temperature increases?

<p>Pressure increases.</p> Signup and view all the answers

Use kinetic theory to explain why pressure in a container increases when temperature increases.

<p>Particles have more kinetic energy, move faster, each particle collides with greater force, increases pressure, collide more frequently with container walls, increases pressure.</p> Signup and view all the answers

What happens to the pressure of a gas in a container when the volume decreases?

<p>Pressure increases.</p> Signup and view all the answers

Use kinetic theory to explain why pressure in a container increases when the volume decreases.

<p>Temperature remains constant, average kinetic energy of gas particles stays the same, however container is smaller, particles collide with walls more often, increased frequency of collisions increases pressure.</p> Signup and view all the answers

What are the properties of solids?

<p>Fixed shape, do not flow, high density</p> Signup and view all the answers

What are the properties of liquids?

<p>Flow easily, fixed volume, will flow</p> Signup and view all the answers

What are the properties of gases?

<p>No fixed volume or shape, less dense, take the shape of the container</p> Signup and view all the answers

What is the process of solid turning into a liquid called?

<p>Melting</p> Signup and view all the answers

What is the process of liquid turning into a gas called?

<p>Boiling / Evaporating</p> Signup and view all the answers

What is the process of gas turning into a liquid called?

<p>Condensation</p> Signup and view all the answers

What is the process of liquid turning into a solid called?

<p>Freezing</p> Signup and view all the answers

What happens when water vapor cools to form liquid water?

<p>Particles lose kinetic energy, move closer together, and move slower and less randomly</p> Signup and view all the answers

What are the characteristics of the structure of solids?

<p>Particles arranged regularly, packed closely together, vibrate in fixed position, strong forces between particles, small amount of kinetic energy</p> Signup and view all the answers

What are the characteristics of the structure of liquids?

<p>Particles are mostly touching with some gap, move about at random, medium forces between particles, moderate amount of kinetic energy</p> Signup and view all the answers

What are the characteristics of the structure of gases?

<p>Particles move at random and quickly, are far apart, weak forces between particles, high amount of kinetic energy</p> Signup and view all the answers

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