Page 1: Introduction to Elements, Mixtures, and Compounds

This page introduces the fundamental concepts of elements, mixtures, and compounds in Year 7 science. It explains that everything in the universe is composed of elements found on the periodic table, which are made up of atoms.

Definition: Elements are pure substances containing only one type of atom, such as iron or sulphur.

The page uses particle diagrams to illustrate the differences between elements, compounds, and mixtures. It explains that some elements exist as individual atoms, while others bond together to form molecules of the same element.

Example: Iron is an element made of only iron atoms, while sulphur is another element containing only sulphur atoms.

The concept of mixtures is introduced, showing how two different pure substances can be combined without chemical bonding.

Highlight: Mixtures, such as iron and sulphur combined, can be separated using physical methods like magnetism.

This page provides a solid foundation for understanding the basic building blocks of matter, which is crucial for Year 7 science revision elements mixtures compounds.

Page 5: Understanding Molecules

This page explores molecular structures, particularly focusing on non-metal elements and common compounds.

Definition: A molecule is a cluster of two or more bonded atoms, either of the same or different elements.

Example: Water (H₂O) molecules contain two hydrogen atoms and one oxygen atom in a specific ratio.

Highlight: Molecular compounds have specific ratios of atoms, such as CO₂ having one carbon atom to two oxygen atoms.