Glossary

Compressibility
Measure of the change of volume of a fluid or a solid as the result of the change of pressure.

Design process
The design process has several steps used to find a solution to a practical problem through the construction of a device or object to test the solution.

Fluids
Fluids are substances that can flow, deform or take the shape of its container. Water and air are examples of fluids.

Geological resources
Resources found in the Earth such as minerals.

Hydraulic principles
Principles related to liquid fluids, such as water or oil.

Particle theory of matter
Theory stating that all matter is composed of tiny particles in constant motion.

Plate Tectonics
The large-scale motions of Earth's outermost shell (lithosphere).

Pneumatic principle
Principles related to gaseous fluids, such as air.

Pressure
The ratio of force to the area over which that force is applied.

Reflection and refraction
Change of direction of waves like light or sound when it hits certain surfaces.

Terrariums
A small container in which are kept selected plants, animals and other living creatures for observation.

Volume
In general, volume refers to an amount of space occupied by an object (e.g., solids, liquids, gas).
In science, volume is expressed in cubic units (e.g., cubic centimetres (cm3) and cubic metres (m3)).