Gr7 - NS Word Bank

the divisions of the year into spring, summer, autumn and winter

an imaginary line around the Earth

half of the Earth, divided by the Equator

incoming solar radiation (heat and light)

two dates, 22 December and 21 June, when the Sun reaches its highest point in the sky directly overhead one of the tropics, giving all places on Earth their longest or shortest day or night of the year depending on ' whether they are in the northern or southern hemisphere

two dates, 21 March and 22 September, when the Sun's t oys fall directly on the equator. All places on the earth experience equal night and day - 12 hours each

a measurement of how for away a place is from the equator

spread out or scattered

halfway between the equator: and the Poles

a process whereby plants use the Sun's energy, carbon dioxide from the air and water from the soil to produce energycontaining food

a network of interactions among and bet ween organisms in their environment

dead plants and animals ore decomposed by organisms called decomposers

a natural source of limited supply

an object in space that orbits a bigger object

a person who travels in space

to circle; the curved course followed by a heavenly body

the large high tides, with lower low tides in beween, are produced twice each month when the Sun and Moon are in line so that their gravitational pull is combined

the small-range tides that occur when the Sun's gravitational pull and the Moon's gravitational · pull are not reinforcing each other

satellites designed by . space scientists and engineers for travel in space

when an object, which is moving around a central point, appears to be moved away from the centre by another force

the point at which two objects, which started with different temperatures, .reach an equal temperature

the transfer of heat energy between solid objects that are in direct physical contact with each other

a material that does not conduct heat well

the transfer of heat energy through the mov81Tlent of particles in liquids and gases

a flow . of particles from one place to another

when a gas changes to a liquid as it cools

the transfer of heat energy by waves, without contact or movement of particles

heat energy that can be transferred by radiation

a process that does not need energy to make it happen

using energy

a method of passive heat · exchange based on natural convection currents

a space in where there are no particles

a material that absorbs heat from a heat source, and then releases it slowly

a machine that has blades, which are turned by a force like high · pressure steam

gases like carbon dioxide, methane and water vapour that trap heat in the atmosphere and reflect it back causing an increase In temperatures on the Earth

a type of sedimentary rock in which oil and natural gas can often be . found

a process used to remove oil and natural gas from layers of rock by pumping water under pressure into it and then blasting the rock blasting the

the splitting of the nucleus of an atom

electricity that is made using moving water to turn turbines

specialised panels that are adapted to absorb sunlight and convert it into electricity

fuels that come from an organic source such as algae

energy that is stored in a system

energy which causes a change or movement

the standard unit Of measurement Of energy

organisms like plants that are able to convert energy from the Sun into chemical energy

animals that eat plants and other animals

a law that states that energy in a system is never lost but simply converted to a different form

a network of . different sources of energy that interact with one another

the passing of energy from one part of a system to another

when energy changes from one form to another, for example . . potential energy · to kinetic energy or vice versa