A combustion reaction is when all substances in a compound are combined with oxygen, which then produces carbon dioxide and water. Combustion is commonly called burning. It is an exothermic reaction, which means heat is produced and is easily distinguished. Combustion occurs predominantly in automobiles, homes, and in factories. An example of a combustion reaction is as follows:
CxHy + O2 --> CO2 + H2O

a process in which a chemical mixture carried by a liquid or gas is separated into components as a result of differential distribution of the solutes as they flow around or over a stationary liquid or solid phase

Rising or sinking air currents that stir the atmosphere and transport heat from one area to another. Convection currents also occur in water.

The state of being in leaf

Experiments is the step in the scientific method that arbitrates between competing models or hypotheses

A nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle with the release of energy

The partially shaded outer region of the shadow cast by an opaque object

Water from the sky such as rain

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

Something salty or that has salt in it such as the ocean

a boundary between two different air masses, neither of which is strong enough to replace the other

Any of the minute pores in the epidermis of the leaf or stem of a plant

Intruding upon or on a person without invintation or without them knowing

It shows the levels of energy in a diagram like a pyramid

The rarefied gaseous envelope of the sun and other stars

One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome

Movement of a fluid from an area of higher concentration to an area of lower concentration

The time or date twice each year at which the sun crosses the celestial equator

The relative capacity of an atom, molecule, or radical to combine

An unbalance force is something that is not opposed by an equal and opposite force operating directly against the force

n apparatus for producing and recording spectra for examination

the quantity of a particular substance that can dissolve in a particular solvent

Dominance in genetics is a non-linear relationship between different forms of a gene and the resultant phenotype

A Non communicable disease is a illness that is not contagues like cancer

The partially shaded outer region of the shadow cast by an opaque object