diffuse

Definition

To diffuse means to spread out over a large area. This can happen with particles, such as gas molecules or dust particles, or with energy, such as heat or light.

Diffusion is a natural process that occurs without any outside force. It is driven by the random movement of particles. As particles move around, they collide with each other and with the walls of their container. These collisions cause the particles to spread out over a larger area.

Diffusion is a very important process in many different areas of science. It is involved in the transport of gases in the atmosphere, the movement of heat through solids, and the absorption of nutrients by plants.

How can the word be used?

The light from the lamp was diffused, creating a soft glow.

Different forms of the word

Noun: diffusion.

Adjective: diffuse.

Verb: diffuse.

Adverb: diffusely.

Synonym: spread.

Antonym: concentrate.

Etymology

The word "diffuse" comes from the Latin word diffundere, which means "to spread out" or "to spread widely". It is made up of the two Latin words "dis" (away) and "fundere" (to pour).

Question

What substance can be diffused?

AQA Science Exam Question and Answer

Question:

Explain the process of diffusion and its importance in biological systems. Provide examples of how diffusion occurs in living organisms and how it helps in maintaining cellular functions.

Answer:

Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration, driven by the random motion of particles. This process plays a critical role in biological systems, particularly in maintaining cellular functions. In living organisms, diffusion occurs across cell membranes, allowing essential substances like oxygen, nutrients, and waste products to move in and out of cells.
For example, during respiration, oxygen diffuses from the lungs into the bloodstream and then into body cells, where it is utilised in cellular respiration to produce energy. Likewise, carbon dioxide, a waste product of cellular respiration, diffuses out of cells into the bloodstream and is eventually removed from the body through exhalation.
Diffusion is also essential in nutrient uptake in plants. Root cells absorb water and minerals from the soil through diffusion, ensuring the plant receives essential nutrients for growth and survival. Overall, diffusion is a fundamental process in biological systems, ensuring the efficient exchange of substances necessary for cellular activities and maintaining homeostasis in living organisms.