Pearson Edexcel International Award in Lower Secondary Science Achievement Test

These flashcards cover key concepts from the Pearson Edexcel International Award in Lower Secondary Science Achievement Test.

Oesophagus

The part of the digestive system that connects the throat to the stomach.

Periodic Table

A tabular arrangement of the chemical elements, organized by increasing atomic number.

Sodium Chloride

A chemical compound represented by the formula NaCl, commonly known as table salt.

Circulatory System

The system that circulates blood and lymph through the body, consisting of the heart, blood vessels, and blood.

Omnivore

An organism that eats both plants and animals, as exemplified by the fox in the food web.

Producer

An organism, typically a green plant, that synthesizes organic compounds from carbon dioxide and water through photosynthesis.

Cell Wall

The rigid layer that surrounds the cell membrane of plants, fungi, and bacteria, providing structural support.

Mass Number

The total number of protons and neutrons in an atomic nucleus.

Current (I)

The flow of electric charge, measured in Amperes (A).

Biodegradable

A term for substances that can be broken down by natural processes and microorganisms.

Abiotic Factors

Non-living environmental factors that affect living organisms, such as light intensity and temperature.

Protons

Positively charged particles found in the nucleus of an atom.

Exothermic Reaction

A chemical reaction that releases energy in the form of heat.

Inertia

The tendency of an object to remain at rest or in uniform motion unless acted upon by an external force.

Efficiency in Energy Transfer

The ratio of useful output energy to the input energy, often expressed as a percentage.