Using the Earth's resources and obtaining potable water key terms

sterilisation

In Potable water, sterilisation means the process of making water safe to drink by eliminating harmful microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to describe sterilisation as part of potable water treatment. Use sterilisation only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

potable water

In Potable water, potable water means water that is safe to drink and has low levels of dissolved salts and microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to describe sterilisation as part of potable water treatment. Use potable water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

potable water

In Potable water, potable water means water that is safe to drink. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to recall chlorine, ozone and ultraviolet light as sterilising methods for potable water. Use potable water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

sterilising methods

Techniques such as chlorine, ozone, and ultraviolet light used to make water safe for consumption.

potable water

In Potable water, potable water means water that is safe to drink and has low levels of dissolved salts and microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to explain why the treatment required depends on the available water source and local conditions. Use potable water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

water treatment

Processes used to make water safe for drinking, which may vary based on the source and local conditions.

ground water

In Potable water, ground water means water that is found underground in aquifers, often used as a source for potable water. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to compare treatment of ground water with treatment of salty water. Use ground water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

salty water

Water that contains a high concentration of dissolved salts, typically found in oceans and seas.

desalination

A process that removes salt and impurities from salty water or sea water to produce potable water.

potable water

In Potable water, potable water means water that is safe to drink and has low levels of dissolved salts and microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to describe desalination as a method for obtaining potable water from salty water or sea water. Use potable water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

distillation

A process that separates components of a mixture based on differences in boiling points.

reverse osmosis

A membrane process that removes ions, molecules, and larger particles from drinking water.

desalination

In Potable water, desalination means a process that removes salt and impurities from seawater to produce potable water. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to explain why desalination processes require large amounts of energy. Use desalination only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

energy requirement

In Potable water, energy requirement means the significant amount of energy needed to carry out desalination processes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to explain why desalination processes require large amounts of energy. Use energy requirement only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

potable water

In Potable water, potable water means water that is safe to drink and has low levels of dissolved salts and microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to give reasons for the steps used to produce potable water. Use potable water only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

water treatment

Processes used to make water safe for drinking, including filtration and sterilisation.

distillation

A process used to separate components in a liquid mixture based on differences in boiling points.

pH testing

A method used to determine the acidity or alkalinity of a solution, indicating its suitability for drinking.

waste water

Water that has been used in some way and contains contaminants, requiring treatment before release into the environment.

treatment

The processes applied to waste water to remove contaminants and make it safe for discharge or reuse.

sewage

In Waste water treatment, sewage means waste water that contains organic matter and harmful microbes. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to describe sewage as waste water that contains organic matter and harmful microbes. Use sewage only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

organic matter

organic matter is a Waste water treatment term used to support the objective: Describe sewage as waste water that contains organic matter and harmful microbes. In Using the Earth's resources and obtaining potable water, use it with the correct resource, water-treatment, LCA, material, Haber process, fertiliser, or sustainability context rather than as a generic repeated keyword.

industrial waste water

Waste water produced by industrial processes that may contain organic matter and harmful chemicals.

organic matter

Carbon-based compounds that are typically found in waste water and can originate from living organisms.

screening

In Waste water treatment, screening means the process of removing large solids and debris from sewage before further treatment. This matters in Using the Earth's resources and obtaining potable water because it supports the learning objective to describe screening and grit removal as early stages of sewage treatment. Use screening only in this subtopic-relevant sense so the definition stays concise, curriculum-specific, and useful for AQA GCSE Biology revision. Students should use this term accurately when they explain the biology, identify symptoms, or justify an answer in GCSE Biology questions.

grit removal

The process of separating sand, gravel, and other heavy particles from sewage to prevent damage to treatment equipment.

sedimentation

The process by which solid particles settle out of a liquid, allowing separation of sewage sludge from effluent.

sewage sludge

The solid residue that results from the treatment of sewage, containing organic matter and other materials.

anaerobic digestion

A biological process that breaks down organic matter in the absence of oxygen, producing biogas and digestate.

sewage sludge

The solid residue that remains after wastewater treatment, containing organic matter and nutrients.