Human Impact

A region removes natural vegetation for commercial farming. Ten years later, the area shows more flash flooding than before. Which process most directly explains this change?

• Increased evaporation from crops

• Reduced soil permeability due to compaction

• Greater infiltration through loose topsoil

• Decreased surface runoff from irrigation

Tags

NGSS.MS-ESS3-4

A wildlife population becomes genetically isolated after a highway is constructed. Which long-term effect is most likely?

• Increased biodiversity through migration

• Reduced genetic diversity due to fragmentation

• Sudden extinction from overpopulation

• Greater reproduction due to road barriers

Tags

NGSS.MS-LS2-4

NGSS.MS-LS4-4

A mining company removes vegetation from steep slopes. Which chain of events is most probable?

• Lower erosion, higher groundwater recharge

• Higher erosion, increased sedimentation downstream

• Increased carbon storage, reduced runoff

• Greater biodiversity, lower nutrient loss

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

NGSS.MS-LS2-4

A developer must choose between building on flat land or steep land. Which choice minimizes human impact and why?

• Steep land, because it prevents deforestation

• Flat land, because it reduces erosion and runoff risk

• Steep land, because it improves groundwater infiltration

• Flat land, because it increases habitat fragmentation

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

Which best explains why replacing forests with pastureland increases atmospheric carbon levels?

• Grass absorbs more CO₂

• Fewer trees means less carbon sequestration

• Livestock directly remove oxygen from the air

• Soil microbes stop cycling nutrients

Tags

NGSS.MS-LS1-6

A city expands its paved surfaces. Which combined effect will most likely occur?

• Higher infiltration and lower stream velocity

• Higher runoff and higher risk of urban flooding

• Lower runoff and increased groundwater storage

• Reduced erosion and increased soil stability

Tags

NGSS.MS-ESS3-4

Which land-use practice most effectively protects soil fertility long-term?

• Clear-cutting trees to promote regrowth

• Bare-soil farming to increase decomposition

• Rotating crops to maintain nutrient balance

• Allowing livestock to graze continuously

Tags

NGSS.MS-ESS3-4

A community wants to reduce habitat loss while growing economically. Which strategy best meets both goals?

• Expanding urban boundaries outward

• Implementing vertical development and green spaces

• Increasing road construction into rural areas

• Reducing zoning restrictions in forests

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-5

NGSS.MS-LS2-4

Increased wildfire frequency is linked to past fire suppression policies. Why?

• Fire suppression lowers tree density

• Fire suppression allows fuel loads to accumulate

• Suppression increases soil erosion

• Fire suppression reduces biodiversity

Tags

NGSS.MS-ESS3-4

A region with heavy agricultural use shows reduced topsoil depth. Which practice would most directly reverse this trend?

• Expanding monoculture fields

• Increasing fertilizer use

• Adding cover crops to restore organic matter

• Grazing animals year-round

Tags

NGSS.MS-LS2-5