The far right column on the periodic table of elements, containing such elements as xenon and radon, is otherwise known as this.
What is the noble gases?
100
This substance within the stratosphere protects us from harmful UV rays from the Sun, and is slowly disappearing.
What is ozone?
100
This is the name for light which is produced by friction between certain rocks.
What is triboluminescence?
100
These three types of tissues can be found within a plant, and all perform different functions to ensure the survival of the plant.
What are dermal, vascular and ground tissues?
100
This is the transfer of living tissues/organs from one species to another.
What is xenotransplantation?
200
This property of any substance is determined by its ability to dissolve in water.
What is its solubility?
200
This agreement was signed by all countries of the United Nations in an attempt to battle climate change, although few to none will be able to live up to their promise.
What is the Kyoto Protocol?
200
Age-related vision deterioration is caused by a loss of elasticity in the eye lens, and is otherwise known as this.
What is presbyopia?
200
These grow on the tips of roots to prevent a plant's roots from damage while they grow.
What are root caps?
200
This organelle is found in plant cells exclusively.
What are chloroplasts?
300
All substances deemed hazardous contain labels which inform and warn the user of the dangers of using said substance. This system of labels is otherwise known as this.
What are the WHMIS labels?
300
This gas is the most plentiful within the Earth's atmosphere, occupying 78% of all air.
What is nitrogen?
300
When reflected rays diverge, yet the human brain projects these rays backwards to produce an image behind the object, said image is known as this.
What is a virtual image?
300
This is the stage of cell division where it is commonly mistaken that the cell rests idle.
What is interphase?
300
This is the ray that leaves the lens, being refracted as it goes from the lens to the air.
What is the emergent ray?
400
This Russian scientist's most notable achievement was the creation of the periodic table of elements.
Who is Dmitri Mendeleev?
400
This climate zone houses countries such as Canada, the United States and the majority of Europe.
What is the Tropic of Cancer?
400
Myopia (or "near-sightedness") can be fixed by using glasses with a corrective lens and this type of meniscus.
What is a negative meniscus?
400
Tumors that are said to be cancerous are otherwise known as this.
What is malignant?
400
This now-defunct lake formed across south-central Canada and into the United States, and came to be when immense sheets of ice from the Ice Age melted.
What is Lake Agassiz?
500
This is the name for a substance made up of two or more elements in a fixed ratio.
What is a compound?
500
The process of warmer, salty surface water flowing within ocean currents to replace fresh sea water is otherwise known as this.
What is thermohaline circulation?
500
If you wanted to burn a piece of paper using light, this lens would be necessary in order to do so.
What is a converging lens?
500
This dense connective tissue can be found in the ear, nose and esophagus, and is made up of special cells in a matrix of collagen fibers.
What is cartilage?
500
This is an ion made up of more than one atom that acts as a single particle.