The forces of attraction which the Earth has for objects on its surface; also the force of attraction between any two objects.

A sour tasting, corrosive substance the opposite of a base substance. Acidic solutions will turn litmus red

The spherical region of the outer solar system that has a population of 'ice dwarfs' .

An organism that feeds on large bits of dead and decaying plant and animal matter. For example, earthworms, dung beetles, and wolverines are detrivores.

A massive, luminous sphere of plasma held together by gravity. A hot glowing sphere of gas that produces energy by fusion.

A type of electricity where the electric charges build up on an object. by rubbing another object. The movement of the charge off the charged object is called what. For example, electric charges built up in rubbing a balloon against your pet's fur

When a substance changes state from a gas to a liquid

An animal that eats both plants and animals.

Energy created by filling a reservoir with ocean water at high tide, and later releasing the water through hydroelectric turbines as the tide ebbs to produce electricity

occurs when a substance changes directly from a solid to a gas without becoming liquid

A part of a meteoroid that survives through the Earth's atmosphere.

The point in orbit farthest from the planet

The physical characteristic, or behaviour trait that helps an organism survive in its local environment

A device that controls the flow of electric current through a circuit. In an open circuit, a light will be off, in a closed circuit, a light will be on.

A scale that measures the acidity of substances in solution; has numbers from 0 (strongly acidic) to 7 (neutral) to 14 (strongly basic).

An energy source that uses a chemical reaction to create an electric current

The amount of work carried out per second is known as power. The amount of power transmitted electrically is the product of voltage (V) with current (1)

A process in green plants and some bacteria during which light energy is absorbed by chlorophyll-containing molecules and converted to chemical energy (the light reaction).During the process, carbon dioxide is reduced and combined with other chemical elements to provide the organic intermediates that form plant biomass (the dark reaction). Green plants release molecular oxygen (02), which they derive from water during the light reaction

A small rock in space

An organism that is hunted by a predator.

Compounds with low melting temperatures, such as hydrogen, helium, water, ammonia, carbon dioxide and methane

A concept stating that the crust of the Earth is composed of crustal plates moving on the molten material below. The theory that the surface of Earth consists of large plates that are continually moving.

A consumer that eats other animals. For example, wolves and orca are carnivores

Any of the four outer, gaseous planets: Jupiter, Saturn, Uranus, and Neptune.

The distance light travels in a year, at the rate of 300,000 kilometres per second (671) million miles per hour); 1 light-year is equivalent to 9.46053e12 km, 5,880,000,000,000 miles or 63,240 AU

A fiammable, colourless, slightly toxic chemical compound with a distinctive perfume-like odour. Also known as ethyl alcohol, drinking alcohol, or grain alcohol, in common usage it is often referred to simply as alcohol

A measure of the energy available to move charges in a circuit between positively-charged and negatively-charged terminals of a battery: measured in volts (V).

The average distance from the Earth to the Sun; 1 AU is 149,597.870 kilometres (92,960,116 miles).

Evolving to appear similar to another successful species or to the environment in order to dupe predators into avoiding the mimic, or dupe prey into approaching the mimic.

A magnet that is created by using electricity in a circuit placed around a piece of metal conductor such as steel or lead

Fluid circulation driven by temperature gradients; the transfer of heat by this automatic circulation.

A homogeneous mixture of two or more substances that combine so that the mixture is the same throughout and the properties of the substances blend.

The cold region of a planetary atmosphere above the convecting regions (the troposphere), usually without vertical motions but sometimes exhibiting strong horizontal jet streams.

is a special telescope which can see images of objects with the help of radiation.

Small pieces of material that have broken off of rocks and have been deposited by water, wind, or ice.

A feeding level within a food web

The point in its orbit where a planet is farthest from the Sun.

The large, spherical body made of rocks and ice orbiting the Sun or another star

Equivalent in part to the crust, the lithosphere comprises of a number of tectonic plates that 'float' on the asthenosphere.

The path followed by an electric current. Electricity must flow in a this to do useful work.

is a mixture of such minerals, rock fragments, volcanic glass, organic matter, or other natural materials

The point in orbit farthest from the Earth

All the influences and conditions in which organisms live, including the actual place, circumstances, soil, water, air, and climate that surround and affect plants and animals in a particular area, and which determine their form and survival

Fuel formed over millions of years from compression of the decayed remains of living matter.Coal, oil, and natural gas are fossil fuels

A rotating star or a pair of stars that emit electromagnetic radiation characterized by rapid frequency and regularity.

A circuit in which the current travels along two or more separate paths to different devices. The current travels through each part of the circuit devices at the same time.

A microscopic structure that is the basic unit of all living things. Organisms can be made of as little as one cell (some types of bacteria) or as many as several trillion cells (human beings).

No static charge and no excess electron or missing electrons.

The closest bright star to our solar system.

The physics term used to describe the energy applied in various ways to move objects or change their position. This usually involve a push or a pulling and is either balanced or unbalanced by other forces.

The rate at which the velocity vector changes . The Sl unit of this is metre per second

A term used to describe a solution that has a value above 7 on the pH scale; the more basic a solution, the higher its pH value

It cannot be seen or touched. It is a property of all matter. It comes in many forms and can be transferred from one object to another, but it cannot be created or destroyed; written as the symbol E

Sequence of events involving t the formation, alteration, destruction, and reformation. of rocks as a result of natural processes such as magmatism (melting of rock into magma), erosion, transportation, deposition,and, Metamogolism.

All the stages in the life of a plant or animal organism, between life and death.

A colourless, odourless, tasteless gas that is the most plentiful element in the Earth's crust. It was discovered in 1772 by Swedish chemist Carl Wilhelm Scheele

The movement of an object due to pushing or pulling is called what. There is increase in energy of the object due to this

The radiation amount that is emitted by a star or celestial object at a given time

Energy created by burning any type of plant or animal tissue to heat water and create steam, which turns turbines and generates electricity

A positively charged subatomic particle. This , along with other subatomic particles make up the nucleus of an atom. The number of this in an atom is called the atomic number of the element.

is the nearest star in the earth

No static charge available as the amount of excess (+) electrons is equal to the amount of deficient (-) electrons.

A group of meteors that are seen in the same part of sky and which occur over a period of few days or few hours

The blanket of air that surrounds the Earth. It is thickest near the ground and gradually fades away to nothing in outer space.

is a natural science that deals with the study of celestial objects (such as moons. planets, stars, nebulae, and galaxies).

A negatively charged partide that is found outside the nucleus of an atom

developed the concept of the Rock Cycle to show how rocks and natural, physical processes are interrelated.

An organism that creates its own food rather than eating other organisms to obtain food; forexample, a plant.

A term used to describe a solution that has a value below 7 on the pH scale; the more acidic a solution, the lower its pH value

To completely mix one substance (the solute) in another (the solvent) to form a solution. For example, if you add sugar to water, the sugar dissolves in the water.

Material that is to be broken down or decomposed by natural processes into simpler compounds. Natural processes include exposure to sun, water, and air.

An animal that does not have a backbone or spinal column. Examples of invertebrates include insects, worms, and crabs.

The better term for electricity; the form of energy that consists of a flow of electric charges as the energy is transferred through a conductor

begin life in water with gills; later, they develop lungs and legs so they can walk on land as adults. Examples include frogs, toads, and salamanders

The physical force that is exerted on all masses and is proportional to the mass of an object.

The heat transfer between two bodies without change in the temperature of the intervening medium. Radiation is also the release of energy from a source.

When the total of all forces on an object equals zero and the object's motion does not change.

An ecology term for the total mass of living organisms in a certain area

A force applied equally to all surfaces of objects or surfaces. Air pressure is the force of all the atmosphere gases pushing down on people at the Earth's surface.

The luminous phenomenon seen when a meteoroid enters the atmosphere, commonly known as a shooting star

: A circuit in which the current travels along a single path to two or more electric devices; the current must travel though each part of the circuit, one device after the other, in turn

Molecules that can be used by cells or living organism to extract energy through metabolic processes. Although nutrients are often sought off only as energy providers, they can also be used as molecular building block for the biosynthesis of cellular structures

An increase in temperature caused when the atmosphere absorbs incoming solar radiation but blocks outgoing thermal radiation; carbon dioxide is the major factor

Liquid or solid particles that are suspended in air or a gas. Also referred to as particulate matter

The mechanical energy of a body that is unused or stored, when the body is at rest.

A thing that transmits heat, electricity, light, sound or other form of energy.

Energy obtained from the natural heat of the Earth.

Large regions of Earth where temperature and precipitation are distinct and certain types of plants and animals are found.

A network of interconnected food chains in an ecosystem.

Rainfall with a greater acidity than normal

The point in its orbit where a planet is closest to the Sun.

Ductile rocks that lie from below the lithosphere to 250 km below the surface

A cloudy mixture in which clumps of a solid or droplets of a liquid are scattered throughout a liquid or gas, For example, muddy water is a suspension

A solution that contains as much of one substance (the solute) as can be dissolved in another substance (the solvent). For example, when you cannot dissolve any more drink crystals in water, the solution is saturated

A compound that produces hydroxide (OH-) in water. A solution that is basic turns red litmus paper blue because it has less hydrogen ions

A shallow underwater ledge located between a continent and the deep ocean crust.

Any animal that preys on food predators have killed, or food recently discarded

A magnetic force caused by electric charges in motion; also, the relationship between magnetism and electricity where one can make the other.

The temperature at which a liquid becomes a solid. Increased pressure usually raise

A continuous flow of electric charges moving from one place to another along a pathway, required to make all electrical devices work; measured in amperes (A)