A  type of bacteria that's resistant to a number of widely used antibiotics

The manipulation of matter on an atomic, molecular, and supramolecular scale.

The network of nerve cells and fibres which transmits nerve impulses between parts of the body.

Nerve cells that receive and send electrical signals over long distances within the body

A body continues in its state of rest or constant velocity unless a resultant  force acts on it.

The rate of change of momentum of a body is directly proportional to the resultant force acting on it and occurs in the direction of the force.  (or  F=ma ,where m = mass, a = acceleration and F=resultant force)

If body A exerts a force on body B, then body B exerts an equal but opposite force on body A.

Harmful gases which contribute to acid rain and global warming. They are emitted as a byproduct of fossil fuel combustion.

Noise pollution or noise disturbance is the disturbing or excessive noise that may harm the activity or balance of human or animal life

A force applied to an object by another body that is not in direct contact with it.

A membrane-bound organelle within a eukaryotic cell that contains most of the cell's genetic material

Oxford, Cambridge and RSA Examinations (OCR) is an examination board that sets examinations and awards qualifications (including GCSEs and A-levels). It is one of England,Wales and Northern Ireland's five main examination boards.

A female hormone that causes development and change in the reproductive organs

Oral contraceptives are medicines taken by mouth to help prevent pregnancy. They are also known as the Pill, OCs, or birth control pills

Expansion or development of land to the point of damage

Fishing with a sufficiently high intensity to reduce the breeding stock levels to such an extent that they will no longer suppport a sufficient quantity of fish for sport or commercial harvest

A naturally occurring, highly reactive gas comprising triatomic oxygen formed by recombination of oxygen in the presence of ultraviolet radiation. 

The reduction of the protective layer of ozone in the upper atmosphere by chemical pollution.

A hole or gap in the protective layer of ozone in the upper atmosphere.

Drugs or medicines for relieving pain

An epidemic of infectious disease that has spread through human populations across a large region; for instance multiple continents, or even worldwide.  (plural : Pandemics)

People entrusted with protecting and preserving parklands – national, state, provincial, or local parks.

A bacterium, virus, or other microorganism that can cause disease

Disease-causing microorganisms.

the orientation of a plant or other organism in response to light, either towards the source of light ( positive phototropism ) or away from it ( negative phototropism )

the branch of science concerned with the nature and properties of matter and energy. The subject matter of physics includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.

The major endocrine gland, a pea-sized body attached to the base of the brain that is important in controlling growth and development and the functioning of the other endocrine glands

A placebo is a dummy pill or injection given to members of a control group in medical trials. Where a placebo is in the form of a pill, it should be identical to the pill used with the experimental group. The only difference should be that that the placebo does not contain the drug being trialled. The use of placebos helps to ensure that the data collected from a trial are valid.

A contaminant that adversely alters the physical, chemical, or biological properties of the environment

The presence in or introduction into the environment of a substance which has harmful or poisonous effects.