Science 6

The excretory system's main job is removing waste and extra water the body doesn't need.

The reproductive system is the body system responsible for producing offspring.

The hormonal (endocrine) system releases hormones — chemical messengers like insulin and adrenalin — into the blood.

The nervous system's main job is sensing information from the world and controlling the body's response.

The First Nations Perspective on Health and Wellness, gathered by BC's First Nations Health Authority from the teachings of First Nations healers and Elders, puts a person at the centre, surrounded by four parts of wellness: mental, emotional, spiritual and physical. All four are nurtured together and kept in balance.

A suspension is a heterogeneous mixture where visible particles are mixed through a liquid but will settle out if left alone.

An emulsion is a heterogeneous mixture of two liquids that don't normally combine, like oil and water.

A colloid is a heterogeneous mixture where tiny particles are spread evenly through another substance and stay mixed rather than settling out.

Mixtures can be separated back into their parts by using a difference in a property — like density, particle size, or how easily something evaporates.

Local First Peoples have long-standing knowledge of methods for separating and extracting materials from mixtures, developed and refined over many generations.

Newton's first law: an object at rest stays at rest, and an object in motion keeps moving at a constant speed in a straight line, unless a force acts on it.

Newton's second law: only an unbalanced force causes an object to accelerate — to speed up, slow down, or change direction.

Newton's third law: every force has an equal and opposite reaction force, so every push or pull has a push or pull back in return.

Balanced forces are equal and opposite, so there is no change in motion — like sitting still in a chair or a tied tug-of-war.

Gravity is the force of attraction that pulls all objects toward each other — the more mass an object has, the stronger its pull.

Scale: the universe is unimaginably large, containing billions of galaxies, each with billions of stars.

Position: our solar system sits in one of the outer spiral arms of the Milky Way galaxy, not at its centre.

Structure: the universe is organized into galaxies, which contain stars, and many stars have their own solar systems.

Motion: our entire solar system orbits slowly around the centre of the Milky Way, along with everything else in the galaxy.

Age: the universe is billions of years old — far older than Earth, the solar system, or any living thing.