
Changing Ecosystem
Authored by Nadia 'Ahmad
Science
7th Grade
24 Questions
NGSS covered
Used 4+ times

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Glaciers melted and exposed a new area of land. What kind of succession would occur?
primary
secondary
biological
eutrophication
Answer explanation
Primary succession occurs when new land is formed, such as when glaciers melt and expose bare rock. This process starts with pioneer species colonizing the area, making it the correct choice.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of lichen in ecological succession?
It helps break down rock to make soil
It allows trees to grow
It creates new land to increase the size of the ecosystem
It provides food for larger mammals
Answer explanation
Lichen plays a crucial role in ecological succession by breaking down rock surfaces, which contributes to soil formation. This process allows for the establishment of other plant life, facilitating further ecological development.
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of algae in eutrophication?
It uses up a large amount of the oxygen available
It provides food for the fish to eat
It cleans the water to improve the quality
It provides habitat for additional species to grow.
Answer explanation
In eutrophication, algae proliferate due to excess nutrients, leading to oxygen depletion as they decompose. This process uses up a large amount of the oxygen available, harming aquatic life.
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is an example of secondary succession?
A lava flow creates new land
A lava flow covers an existing portion of land
Answer explanation
Secondary succession occurs in areas where a disturbance has destroyed an existing ecosystem but left the soil intact. A lava flow covering existing land fits this definition, as it disrupts the ecosystem but not the soil.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is an example of primary succession?
A lava flow creates new land
A lava flow covers an existing portion of land
Answer explanation
Primary succession occurs on newly formed land, such as that created by a lava flow. This process starts with bare rock, allowing pioneer species to colonize and gradually build an ecosystem, unlike covering existing land.
Tags
NGSS.MS-ESS2-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trees are chopped down by loggers for new building materials. Over time, the trees begin to grow again. What type of succession would this represent?
primary
secondary
eutrophication
climax
Answer explanation
This scenario represents secondary succession because the area was previously occupied by trees. After logging, the ecosystem can recover and regrow, unlike primary succession, which occurs on barren land.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An old parking lot has been abandoned. Over time, soil builds up and grasses start growing. What type of succession has occurred?
primary
secondary
eutrophication
climax
Answer explanation
The succession described is primary succession, as it occurs in a previously uninhabited area where soil has formed over time, allowing grasses to grow. This contrasts with secondary succession, which happens in areas where life previously existed.
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