Young people intuitively understand that matter takes different forms - water, for example, can be liquid, solid ice, or gaseous steam. This book will give readers a deeper understanding of the different states of matter. Through colorful photographs and lively discussions of familiar materials, readers will be drawn in to learn about matter's many forms. Topics include - understanding matter, mass, volume, and density - differences between solids, liquids, and gases - how matter passes from one state to another - properties of matter, such as hardness and viscosity. Teacher's guide available.

The only textbook that fully supports the Chemistry part of the OxfordAQA International GCSE Combined Sciences specification (9204), for first teaching from September 2016. Written by experienced authors, the engaging, international approach ensures a thorough understanding of the underlying principles of chemistry and provides exam-focused practice to build assessment confidence. It fully covers the 3 required chemistry practicals in the specification, enabling your students to build the investigative and experimental skills required for assessment. This textbook helps students to develop the scientific, mathematical and practical skills and knowledge needed for the Oxford AQA International GCSE Combined Sciences exams and provides an excellent grounding for further study at A Level. The online textbook license can be accessed on a wide range of devices and is valid until 31st December 2026, for use by one student or teacher. Your first login will be sent to you in the mail on a printed access card.

Newly revised in line with the latest syllabus and with a modernised, student-friendly design, including a truly interactive CD which provides additional practice for students and brings lab work to life with exciting activities and simulations.

MOLECULES and the Chemical Bond is about understanding Schrodinger s equation, for chemical systems.

In his famous Lectures on Physics, Richard Feynman quotes Paul Dirac on what it means to understand an equation. I understand what an equation means, said Dirac, if I have a way of figuring out the characteristics of its solutions without actually solving it. That hits the nail on the head It s precisely what Conceptual Valence Bond Theory does for Schrodinger s equation.

A physical understanding of an equation, adds Feynman, is a completely unmathematical, imprecise, and inexact thing, but absolutely necessary for a physicist. It unfolds in MCB in two stages, described by Newton as a stage of Analysis (a union of observations and inductions) and a stage of Synthesis (use of inductions, accepted as first principles, to explain observations).

The book s chief vehicle for creating an intuitive understanding of solutions of Schrodinger s equation is the world s largest and to the author s knowledge, virtually only library of line drawings of exclusive orbital models of chemical species electron density profiles.

By focussing attention on fundamental physical principles and by avoiding use of atomic orbitals and, thereby, mathematical complexities associated with Schrodinger s equation (the only source of atomic orbitals), the book s essays provide a scientifically sound, student-friendly introduction to modern valence theory.

Repetition of fundamental ideas, here and there, is intended to make individual essays understandable and interesting, each by itself, so that readers may examine them in any order, in leisurely walks, so to speak, in the big garden that is valence theory, picking bouquets to their liking. "

This book presents historical and conceptual considerations about some of the topics of a general chemistry syllabus used by the authors as introductory lectures to the said course. On the basis of their teaching experiences, the authors have arranged their ideas, so as to make the salient points of scientific disciplines like chemistry clear and easily used. In other words, their considerations may be employed as outlines of lectures on specific issues, which are to be completed by adding pertinent explicative examples and reading passages. To conclude the discussion of this subject, the authors also give some ideas as to considering a cultural approach to the teaching of chemistry, which they consider very important, and in general their proposal to improve the present way of teaching scientific disciplines.