planet earth

Question 1

what is biotic

Answer 1

living things in the environment like plants and animals

Question 2

what is abiotic

Answer 2

non-living things like air, water and soil

Question 3

what is symbiosis

Answer 3

interaction between organisms of different species that lasts over time

Question 4

what are three types of symbiosis?

Answer 4

mutualism, parasitism and commensalism

Question 5

what is mutualism

Answer 5

symbiotic relationship that benefits both organisms

Question 6

what is parasitism

Answer 6

symbiotic relationship where one organism is harmed and one benefits

Question 7

what is commensalism

Answer 7

symbiotic relationship where one organism benefits and one neither benefits nor is harmed

Question 8

what is an ecologist?

Answer 8

scientist who studies interactions between biotic and abiotic parts of the environment

Question 9

what is ecology?

Answer 9

study of how organisms interact with each other and the environment

Question 10

what is an ecosystem?

Answer 10

all the interacting parts of a biological community and its environment

Question 11

what is succession?

Answer 11

the process by which new species gradually replace old species in an ecosystem

Question 12

DDT and its effect

Answer 12

pesticide used in canada led to near extinction of peregrine falcon because made egg shells thin

Question 13

bioaccumulation

Answer 13

movement of pollutants through levels of food chain. increasing up the food chain

Question 14

ecological footprint

Answer 14

a calculation of the total are of land and water needed to supply all of the materials and energy a human uses as well as absorb the waste produced

Question 15

conservation

Answer 15

reduce, reuse, recycle.

Question 16

Sustainability

Answer 16

resources of nature are being at renewed at least as quickly as they are used and all waste is completely absorbed

Question 17

food pyramid

Answer 17

a model of an ecosystem that represents the number of organisms consumed at each level. producers are the base

Question 18

food web

Answer 18

the network of feeding relationships among organisms

Question 19

food chain

Answer 19

a sequence of feeding relationships among living organisms, as they pass on food energy

Question 20

scavengers

Answer 20

an organism that eats dead or decaying plant or animal matter. ex beetle

Question 21

decomposers

Answer 21

organisms that breakdown cells of dead or waste materials and absorb there nutrients ex bacteria, fungi

Question 22

pollution

Answer 22

different types of harmful materials that are released into the environment through human activities

Question 23

food chain roles

Answer 23

producers, consumers, hebivore, omnivore
energy transfer between organisms

Question 24

natural resources

Answer 24

the materials and products found in nature

Question 25

what is a bimetallic strip and what does it do

Answer 25

typeof thermometer made up of two different metals joined together, often formed into a coil. when heat is applied to the end, one of the metals will expand faster than the other and the coil can operate a switch or valve like a thermocouple

Question 26

what are room ,body, boiling and freezing temperatures. absolute zero

Answer 26

room is 20
body is 37
boiling is 100
freezing is 0
absolute zero is -273

Question 27

What are the states of matter? describe each

Answer 27

solid - keep their shape, particles close together, cant be compressed
liquid - take shape of container, cant be compressed
gas - no definite shape, particles far apart, can be compressed

Question 28

what is the particle model of matter?

Answer 28

all substances are made of tiny particles too small to be seen
the particles are always in motion
the particles have space between them

Question 29

what is expansion?

Answer 29

an increase in average energy causes the particles to move and the distance between particles gets bigger

Question 30

What is contraction?

Answer 30

Decrease in average energy, particles get closer together

Question 31

heat insulator

Answer 31

poor conductors that slow down the transfer of thermal energy

Question 32

What are the different types of energy ?

Answer 32

chemical, mechanical, solar, geothermal, electrical,
thermal

Question 33

celsius vs kelvin scale

Answer 33

celsius based on water: kelvin zero is -273 c, needed a lower temperature scale for scientists

Question 34

photosynthesis

Answer 34

plants use sun energy to combine carbon dioxide and water to create oxygen and sugar CO2 + H2O -> C6H12O6 +O2. occurs in chlorophyll

Question 35

pain killer plants

Answer 35

white willow (aspirin) opium (morphine) and chincona (quinine)

Question 36

flowers

Answer 36

play important role in sexual reproduction of plants attracting insects

Question 37

flower parts

Answer 37

pistil (female reproductive organ)
includes: stigma - sticky tip that catches pollen
style - stalk that supports stigma
ovary - contains ovules
ovules - female reproductive cell
stamen (male reproductive organ)
includes: filament -supports anther
anther -where pollen produced
pollen grains - male reproductive cell
petal - bright color that attracts insects
sepal - protect flower before it opens

Question 38

types of trees

Answer 38

coniferous, deciduous

Question 39

4 parts of plants

Answer 39

roots - uptake of water and nutrients (fibrous or taproot)
stems- transport and storage
leaves - photosynthesis and respiration
flower- reproduction

Question 40

asexual (vegetative) reproduction

Answer 40

parent plant grows new plant from roots stems orleaves. cuttings, layering, grafting and fragmentation

Question 41

sexual reproduction

Answer 41

production of seeds and fruits from specialized reproductive cells of two plants. cones and fruit