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Environmental Science Quiz

Total questions: 40

Worksheet time: 20mins

Name
Class
Date
1.

Which farming technique helps reduce soil erosion by planting crops across slopes?

a)

Clear cutting

b)

Contour plowing

c)

Strip mining

d)

Selective cutting

2.

Which farming method involves alternating different crops in the same field each year?

a)

Terracing

b)

Crop rotation

c)

Plant shelterbelts

d)

Conservation tillage

3.

Which layer of soil contains organic matter like decomposed leaves?

a)

C-horizon

b)

Bedrock

c)

A-horizon

d)

Oxisol

4.

Which horizon is mostly made of partially weathered parent material?

a)

A-horizon

b)

C-horizon

c)

Illuviated layer

d)

Topsoil

5.

Humus is important because it:

a)

Causes salinization

b)

Reduces water infiltration

c)

Adds nutrients to soil

d)

Increases erosion

6.

Which soil issue involves salt buildup in soil?

a)

Desertification

b)

Nutrient mineral depletion

c)

Soil salinization

d)

Illuviation

7.

Which soil type is most fertile and commonly found in grasslands?

a)

Spodosols

b)

Mollisols

c)

Aridisols

d)

Oxisols

8.

Which logging method removes all trees in an area?

a)

Selective cutting

b)

Shelterwood cutting

c)

Clear cutting

d)

Seed-tree cutting

9.

What is a confined aquifer?

a)

One exposed to the surface

b)

One trapped between impermeable layers

c)

One created by desalination

d)

One caused by saltwater intrusion

10.

Subsidence happens when:

a)

Rivers overflow and create new soil

b)

The ground sinks due to groundwater removal

c)

Aquifers refill too quickly

d)

Soil becomes too sandy

11.

What is a major cause of increased soil erosion?

a)

Conservation tillage

b)

Overgrazing

c)

Crop rotation

d)

Terracing

12.

What practice helps decrease soil erosion?

a)

Overharvesting

b)

Deforestation

c)

Plant shelterbelts

d)

Overgrazing

13.

A species that is highly specialized is more likely to:

a)

Expand its range

b)

Become endangered

c)

Increase population size

d)

Become invasive

14.

What is background extinction?

a)

Sudden global extinction events

b)

Natural, low-level extinction over time

c)

Extinction caused only by humans

d)

Extinction of keystone species

15.

Mass extinction is defined as:

a)

Normal species turnover

b)

The slow disappearance of a species

c)

A rapid loss of many species globally

d)

The recovery of extinct populations

16.

Conservation biology focuses on:

a)

Maximizing hunting harvests

b)

Protecting biodiversity and ecosystems

c)

Increasing urban development

d)

Removing all predators

17.

Wildlife management mainly focuses on:

a)

Protecting entire ecosystems

b)

Maintaining hunted or harvested populations

c)

Preventing all human influence

d)

Eliminating invasive species only

18.

A threatened species is one that:

a)

No longer exists

b)

Is likely to become endangered

c)

Is safe and stable

d)

Has recovered from danger

19.

An endangered species is one that:

a)

Is at high risk of extinction

b)

Has abundant populations

c)

Is only found in zoos

d)

Cannot reproduce

20.

Ex situ conservation includes:

a)

National parks

b)

Wildlife refuges

c)

Zoos and seed banks

d)

Habitat corridors

21.

In situ conservation protects species:

a)

In captivity

b)

In their natural habitat

c)

Only during breeding season

d)

By removing predators

22.

A benefit of crop rotation is:

a)

Increased erosion

b)

Reduced soil nutrients

c)

Soil fertility improvement

d)

Increased pesticide resistance

23.

What is the main solution used today to reduce flooding on floodplains?

a)

Removing wetlands

b)

Constructing levees and restoring floodplains

c)

Planting only one crop

d)

Deep-well drilling

24.

Agricultural loam is best described as:

a)

Mostly clay

b)

Mostly sand

c)

Balanced mixture of sand, silt, and clay

d)

Only organic matter

25.

Too much clay in soil makes it:

a)

Drain too fast

b)

Hold too much water and become compacted

c)

Nutrient-poor

d)

Erode quickly

26.

Too much sand in soil causes it to:

a)

Hold too much water

b)

Drain too quickly

c)

Become acidic

d)

Lose organic matter

27.

The American Dust Bowl occurred mainly because of:

a)

Terracing

b)

Overplowing and drought

c)

Increased irrigation

d)

Too many shelterbelts

28.

Habitat fragmentation is caused by:

a)

Building roads and developments

b)

Planting trees

c)

Crop rotation

d)

Conservation tillage

29.

Poaching is defined as:

a)

Legal harvesting

b)

Illegal hunting or capturing wildlife

c)

Farming rare plants

d)

Logging without roads

30.

Desertification is most likely in areas with:

a)

Heavy rainfall

b)

Overgrazing and drought

c)

Dense forests

d)

Wetlands

31.

Which water management method recycles and reuses water?

a)

Aqueducts

b)

Groundwater pumping

c)

Wastewater treatment

d)

Clear cutting

32.

A major disadvantage of clear cutting is:

a)

Increased biodiversity

b)

Increased soil erosion

c)

Reduced soil exposure

d)

Improved water retention

33.

Which farming technique slows downhill water flow?

a)

Terracing

b)

Clear cutting

c)

Aquifer drilling

d)

Seed-tree cutting

34.

Illuviation refers to:

a)

The layer where minerals leach out

b)

The buildup of materials transported from above

c)

Organic matter formation

d)

Soil salinization

35.

Which soil type is very old, nutrient-poor, and found in tropical rainforests?

a)

Oxisols

b)

Alfisols

c)

Mollisols

d)

Spodosols

36.

Seed-tree cutting leaves behind:

a)

No trees

b)

Only the oldest trees

c)

A few mature trees for reseeding

d)

Trees in scattered islands

37.

Which practice causes soil nutrient depletion?

a)

Crop rotation

b)

Overharvesting

c)

Terracing

d)

Plant shelterbelts

38.

Saltwater intrusion is most commonly caused by:

a)

Fish farming

b)

Excessive groundwater pumping near coasts

c)

Conservation tillage

d)

Habitat fragmentation

39.

What natural characteristic increases extinction risk?

a)

Wide habitat range

b)

Large population size

c)

Slow reproductive rate

d)

High genetic diversity

40.

Human-induced extinction factors include:

a)

Crop rotation

b)

Healthy aquifers

c)

Pollution and habitat destruction

d)

Natural selection