Page 105 - The Ontario Curriculum, Grades 9 and 10: Science, 2008 (revised)

translucent. Able to transmit light but in a dif- fused manner that prevents objects or images from being seen distinctly.
transmission (of light). A process whereby light passes through matter and may be refracted and/or absorbed.
transparent. Able to transmit light so well that objects or images can be seen as though there were no intervening material.
triboluminescence. Light produced from friction.
universe. Everything that physically exists: the entirety of space and time, and all forms of mat- ter and energy.
vertex. The middle point of a curved mirror
virtual image. An image formed when the light rays from an object pass through a lens. Although the image does not form a visible projection on a screen, it has a definite position and size and can be imagined.
viscosity. The degree to which a fluid resists flow under pressure.
volt. The SI metric unit of electric potential and electromotive force.
voltmeter. A device for measuring electrical potential difference in volts.
watershed. The entire geographical area drained by a river and its tributaries.
weather. The specific condition of the atmosphere at a particular place and time. It is measured in terms of such things as wind, temperature, humidity, atmospheric pressure, cloudiness, and precipitation. In most places, weather can change from hour to hour, day to day, and sea- son to season.
WHMIS. An acronym that stands for Workplace Hazardous Materials Information System. This system, which is in use across Canada, allows employers and workers to obtain information about hazardous materials in their workplace in order to protect their health and ensure their safety.
word equation. A method of expressing a chemical change using the names of reactants and products.
xylem. A complex, specialized, water-carrying tissue in the vascular system of higher plants.
GLOSSARY
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