EXP 1 and 2 Ecosystem RETEST

In the 1700s and 1800s, sea otters were overhunted for their fur, and their population dropped. As a result, there were more sea urchins eating kelp. Which disruption most likely impacted the transfer of energy in kelp forest food webs?

• invasive species

• natural disaster

• human activity

• organisms moving out

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

complete each sentence

_________ are natural disasters. Natural disasters change the transfer of ________ in food _________ when organisms are added or removed.

•  Severe floods, energy, webs

• Overhunting, energy, Keys

•  Severe floods, energy, Keys

• Overhunting, energy, webs

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

The act of interfering in a process in the hopes of improving a situation

• intervention

• invasive species

• impact

non-native species that spread rapidly

• intervention

• invasive species

• impact

Change something in some way. For example a burnt-over forest after a wildfire or a sediment-covered beach after a tsunami.

• intervention

• invasive species

• impact

Which two organisms often begin the process of primary succession?  

• ferns

• seedlings

• lichens

• mosses

complete each sentence

__________ succession is the series of changes that occurs where the ecosystem has been disturbed by natural events or human activity, but _____ soil or organisms still exist. Secondary succession begins from the existing _______.

• Primary, some, water

• Secondary, no, water

• Primary, no, soil

• Secondary, some, soil

the series of changes that occurs on surfaces where no soil or organisms exist

• primary succession

• pioneer species

• secondary succession

• colonize

the first species to populate an area

• primary succession

• pioneer species

• secondary succession

• colonize

The series of changes that occurs in an area where the ecosystem has been disturbed by natural events or human activity, but where soil and organisms still exist

• primary succession

• pioneer species

• secondary succession

• colonize