Science exam terms

Question 1

ergonomics

Answer 1

making a product easier and more efficient for human beings

Question 2

solid structure

Answer 2

relies on solid materials to support loads

Question 3

frame structure

Answer 3

the skeleton supports the weight of the structure

Question 4

shell structures

Answer 4

solid outer structure and hollow inner structure

Question 5

internal forces

Answer 5

forces from the inside (for example, weight)

Question 6

external forces

Answer 6

forces from the outside (for example, hurricane)

Question 7

magnitude

Answer 7

the amount of force being applied to a structure

Question 8

direction

Answer 8

direction at which the force is being applied

Question 9

point of application

Answer 9

where the force is being applied

Question 10

stability

Answer 10

determined by the materials, centre of gravity, and structure

Question 11

plane of application

Answer 11

the angle which the force is being applied

Question 12

separating mixtures

Answer 12

ways to separate mixtures are evaporation, distillation, magnetism, filtration, chromatography

Question 13

pure substances

Answer 13

a substance made out of one type of atom or molecule

Question 14

mixtures

Answer 14

a material made up of two or more substances

Question 15

components of a solution

Answer 15

solute and solvent

Question 16

concentration

Answer 16

the amount of solute and solvent

Question 17

saturation

Answer 17

no more solute can be added or dissolved

Question 18

periodic table

Answer 18

a table listing all known elements

Question 19

particle theory

Answer 19

matter is made up of small particles which are constantly moving

Question 20

forms of heat transfer

Answer 20

convection, conduction and radiation

Question 21

convection

Answer 21

transfer of heat through fluid (liquid or gas) caused my a molecular motion

Question 22

conduction

Answer 22

transfer of heat or electric current from one substance or another by direct contact

Question 23

radiation

Answer 23

energy that is radiated or transmitted in the form of rays, waves or particles

Question 24

solar energy and greenhouse effect

Answer 24

the atmosphere and earth gain energy that they absorb from the sunś radiation that warms the planet

Question 25

fossil fuels

Answer 25

fuel sources created over millions of year from dead organisms

Question 26

green energy

Answer 26

energy sources that do not contribute to greenhouse gas (solar, wind, tidal)

Question 27

Linnaean taxonomy

Answer 27

method used to classify all living things (DKPCOFGS - Dear Kevin Please Come Over For Grading Science)

Question 28

Ecosystem

Answer 28

a biological community of organisms and their physical environment

Question 29

biotic factors

Answer 29

living parts of an ecosystem (animals and plants)

Question 30

abiotic factors

Answer 30

non-living contributors to an ecosystem (example, water, sun, rocks, etc.)

Question 31

succession

Answer 31

the process in which plants fill an environment over time

Question 32

trophic levels

Answer 32

the level of organisms in an ecosystem based on their level on the food chain

Question 33

energy flow

Answer 33

the energy passed on from an organism as they move up the food chain (90% of the energy the organism had is lost as it is consumed)

Question 34

human impact

Answer 34

human actions that impact the environment such as habitat destruction, resource use, land change