All Resources (page 104)

Periodic table Acid Corrosive substance which has a pH lower than 7. Acidity is caused by a high concentration of hydrogen ions....

Particles (year 8) Alloy An alloy is a mixture of two or more elements, at least one of which is a metal. Chromatography ...

All Around Us Atmosphere The layers of gases that surround the Earth. The important gases in the atmosphere are nitrogen, oxygen...

Chemical Reactions Acid Corrosive substance which has a pH lower than 7. Acidity is caused by a high concentration of hydrogen ions...

Particles (Year 7) Atom The smallest particle of an element that can exist. Boil ...

Reproduction Embryo The next stage after an egg has been fertilised. Fertilisation ...

Cells Cell membrane Surrounds the cell and controls movement of substances in and out. Cell wall ...

Microbes Antibiotics Substance that controls the spread of bacteria in the body by killing them or stopping them reproducing.

Health and Fitness Anaerobic Releasing energy from the breakdown of glucose without oxygen, producing lactic acid (in animals...

Ecology Adaptation A feature of an organism`s body which helps it to survive. Biodivers...