Science+Terms

=//__Science Terms__//=

__Unit 1: Variety of Life__

1.1 __//**livng things**//__: anything that displays all the characteristics of life. 1.2 __//**non-living things**//__: anythig that does not display all the characteristics of life. 1.3 __//**dead**//__- anything that once showed the characteristics of life but does not anymore 1.4 __//**adaptation-**//__ an organism's structures, skills, and abilities that enable it to survive in its environment. 1.5 __//**classification**//__- the sorting, grouping, arranging, and/or categorizing of large amounts of data or information into smaller groups. 1.6 __//**organism**//__- a synonym for" living things." 1.7 __//**arthropod**//__- an animal that has an exoskeleton and three or more pairs of jointed legs. 1.8 //__**exoskeleton**__//- a hard ouside covering of an animal that has no skeleton inside its body. 1.9 __**identification key-**__ a set of questions, descriptions, and/or pictures that guide you through a process of identifying an organisms. 1.10 __**insect**__- arthropods that have three pairs of jointed legs, an exoskeleton, and three body segements. 1.11 __**vertebrate**__- an animal that has a backbone. 1.12 __**invertebrate**__- an animal that does not have a backbone. 1.13 __**kingdom**__- the largest, most inclusive grouping of related organisms

__Unit 2: Out of this World__

2.1: __**solar system**__: the Sun and all the objects that orbit it. 2.2: __**diameter**__: the length of the straight line through the centre of a circle or another round object, from one side to the other. 2.3:__**atmosphere**__: the layer of gases that surrounds a planet or moon. 2.4: __**meteoroid**__: dust or a small chunk of rock which orbit's the Sun. A meteoroid that travels through Earth's atmosphere becomes a meteor. A meteor that hits the Earth's surface is called a meteorite. 2.5: __**asteroid**__: a small, rocky object orbiting the Sun. 2.6: __**comet:**__ a small, icy object that orbits the Sun. The centre, or nucleus, of a comet is a ball of ice and dust. When the nucleus is close enough to the Sun, the heat causes some of the ice to evaporate and to produce a long, bright tail. 2.7: __**gravity:**__ a pulling force that acts between all objects in the universe. The Moon is attracted to the Earth by gravity. 2.8: __**weight:**__ a measure of how much gravity pulls on an object or a body. 2.9: __**mass:**__the amount of matter in an object. 2.10:__**orbit**__:the path of one object as it revolves around another object. 2.11:__**star**__: a large ball of gas that gives off light and heat because of nuclear reactions deep inside ot. 2.12: __**constellation**__: a pattern found among the stars. Ancient peoples named many constellations after animals and mythological characters.

__Unit 3: The Sky's the Limit__

3.1: __**atmosphere**__: the air that surrounds Earth. 3.2: __**equilibrium**__: a codition in which opposing forces exactly balance, or equal, each other. 3.3: **__gravity__**: the force that attracts things towads the centre of a large object. 3.4: __**mass**__: the amount of matter an object is made up of. 3.5: __**pressure**__: a continual force pushing against something. 3.6: __**weight**__: how heavy the force of gravity makes the mass of an object.