Exploration: Entering the World of Secondary Science

Vocabulary terms and concepts from Grade 9 Science Chapter 1 regarding the scientific method, modeling, and terminology.

Magnifying Glass Symbol

A symbol representing careful observation, noticing patterns, and paying attention to things that might otherwise be missed.

Compass Symbol

A symbol reminding scientists that exploration needs direction, including choosing appropriate models and knowing the limits of where ideas apply.

Models

Simplified ways of looking at real systems that focus only on what is most important for a given question by making assumptions and ignoring certain details.

Meghnad Saha

A physicist who simplified the study of stars by treating stellar matter as a hot gas and focusing on temperature, pressure, and the formation of ions.

Celeritas

The Latin word for speed, which provides the origin for the symbol $c$ used to denote the speed of light.

Speed of Light

A physical constant defined to be exactly $299792458\,m/s$.

Standard Units (SI)

Agreed international standards for measurements that allow scientific results to be compared and ensure fairness in trade and daily life.

Law

A description of a regular pattern observed in nature, often expressed using words or mathematical relationships, such as Newton's laws of motion.

Theory

An explanation of why natural patterns occur, based on evidence gathered over time and subjected to careful testing and critical examination.

Principle

A broad idea that helps make sense of a given situation, such as the principle of conservation of energy.

Prediction

A reasoned expectation based on evidence and careful thinking that anticipates what will happen under new or different conditions.

Estimation

A scientific skill involving approximate reasoning to check whether an answer makes sense and to build intuition.

Kilocalories (kcal)

A unit of energy; an average adult needs about $2000-2500\,kcal$ per day.

Interdisciplinary Science

The approach of using ideas from physics, chemistry, biology, and earth science together to solve real-world problems like climate change or medicine.