Module 9.3 Natural and human impacts

Question	Answer
What are Natural events?	Naturally occurring geological hazards that affect ecosystems include volcanoes, earthquakes and tsunamis. Image: Images?Q=Tbn:A Nd9 Gc Qqt Xif Zav Iznbk Rb Jgnj Xj Ri 8zb3 Hxon2 Gc5 G Gnj P9 Sgeyp (image/jpeg)
What are bushfires?	Bushfires are common events in Australia and they burn through natural vegetations, plantations and towns. Image: 5954486 3x2 340x227 (image/jpeg)
What impact does fire have on the ecosystems?	It promotes germination of many species. Image: 286564 3x2 940x627 (image/jpeg)
How does eucalyptus survive bushfires?	Eucalypt species such as brown top stringy bark have developed thick, fibrous bark that insulates the living cells beneath it against the heat of the fire and so keeps the growing part of the trunk and branches alive. Image: Epicormic Bud.Small (image/jpeg)
What is epicormic growth?	Growth of new shoots from the stems of trees and shrubs after fires. Image: Bfd (image/jpeg)
What is a lignotuber?	A swollen underground stem of eucalypts that can resist fire. Image: Cussonia Paniculata Lignotuber (image/jpeg)
What is a Mallee?	A type of eucalypt that has lignotuber. Image: 310px Eucalyptus Stricta Woodford (image/jpeg)
What is a drought?	A drought is a period of no rain or low rainfall. Image: A Hr0c Dov L3d3dy5sa X Zlc2 Np Zw5j Zs5jb20va W1h Z2 Vz L2kv Md Aw Lz Ay Ns83 Mzcvb3 Jp Z2lu Y Wwv Zh Jvd Wdod C13 Zwf0a G Vy Lmpw Zw== (image/jpeg)
How can drought change ecosystem?	Drought can change ecosystems by increasing the death rate of plants and animals. Image: Images?Q=Tbn:A Nd9 Gc T6p Ncjq I Fu Dr Hm Ox Fe E014 K O0 Ofct44 Te Od V9s H Fgtm Cqi Z0 (image/jpeg)
How does soil affect the ecosystems during a drought?	Loss of plant cover also leads to soil erosion by wind. When the rains do return, water erosion can further damage the land by washing away the soil Image: 492 (image/jpeg)
What is a habitat destruction?	Damaged caused to the factors in environment needed for survival. Image: Habitat Destruction C2a7d89894498e78 (image/jpeg)
What is overcropping?	Removing more individuals from a population that can be replaced by breeding. Image: 1a8b7a5b 961a 4dcc 875c 8fda31044fee (image/jpeg)
What are feral animals?	An introduced species of animal that has become established to the wild . Image: Cats Fig 1b Small (image/jpeg)
What are introduced species?	Species that are not native to Australia. Image: 4294211 Orig (image/jpeg)
What is a insecticides?	A chemical that kills insects. Image: 1200px Flit Spray Can 1 (image/jpeg)
What is global warming?	The increase of the temperature of Earth's atmosphere. Image: Images?Q=Tbn:A Nd9 Gc Rjv Wyb Prmbc67zk18halt Cx An Zqk98 Ixq5 A Mw Ens D55 J Vatz (image/jpeg)
What is chemical pollution?	Chemicals escaping into the environment that can damage ecosystem. Image: Oil Pollution 1 (image/jpeg)
Flooding	An event where water covers the land and does not soak for a long time. Image: Images?Q=Tbn:A Nd9 Gc Q Fsvx Pv A7i G2 Tj Nd Kj T13jz Jc7ac O6hzz J0 Ucoq1e Au M Uh Wj (image/jpeg)
How does flooding affect the ecosystem?	There are higher death rates of native animals and plants. Image: Ecosystems Change 15 638 (image/jpeg)
What is the most significant problem in oceans and lakes?	Plastics. Image: Plastics 1349360954 456 (image/jpeg)

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Module 9.3 Natural and human impacts

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	Created by Addna Dahir over 6 years ago