Quiz about :6.E.2.3 & 2.4 Weathering & Soil (snet)

Question 1

Some plants need to be in an environment where water drains easily. Which type of soil content will BEST benefit these plants?

Accepted Answer

sand

Answer

shale

Answer

clay

Answer

silt

Question 2

Soil in Anchorage, Alaska, is very shallow. Which is a biotic factor that plays the largest role in limiting the soil thickness in Anchorage?

Accepted Answer

Decayed plant material is limited due to short growing seasons.

Answer

Precipitation falls mainly as snow or frozen rain.

Answer

Shade from the mountains blocks sunlight from reaching the soil.

Answer

Cold temperatures keep the soil frozen for many months of the year.

Question 3

Soil color is closely related to its content. Which element causes soil to appear red?

Accepted Answer

iron

Answer

silicon

Answer

calcium

Answer

magnesium

Question 4

Which is an example of a mixture?

Accepted Answer

soil

Answer

oxygen

Answer

ice

Answer

silver

Question 5

Which is considered a property of soil?

Accepted Answer

texture

Answer

streak

Answer

fracture

Answer

luster

Question 6

Which best explains the relationship between parent rock and soil composition?

Accepted Answer

Weathered parent rock is the largest component of soil.

Answer

Weathered parent rock determines the number of organisms found in the soil.

Answer

Weathered parent rock determines the amount of air found in the soil.

Answer

Weathered parent rock is the smallest component of soil.

Question 7

Which environment would MOST likely have rich, fertile soil?

Accepted Answer

a flood plain

Answer

a desert plain

Answer

a coastal beach

Answer

a mountain peak

Question 8

Which of these particles, when found in soil, contributes MOST to the water retention in soil?

Accepted Answer

clay

Answer

gravel

Answer

sand

Answer

silt

Question 9

Topsoil is considered to be MOST fertile when it has a

Accepted Answer

high organic matter level.

Answer

low pH level.

Answer

low sand content.

Answer

high parent rock material level.

Question 10

Humus is an organic material that makes up soil. Which characteristic BEST indicates that soil has a high humus content?

Accepted Answer

the color of the sample

Answer

the mass of the sample

Answer

the amount of clay in the sample

Answer

the amount of rock in the sample

Question 11

A gardener wants to increase the ability of garden soil to retain water. Which of these should the gardener add to the soil?

Accepted Answer

organic material

Answer

coarse sand

Answer

loose gravel

Answer

nitrogen pellets

Question 12

The BEST soil mixture for plant growth and drainage is

Accepted Answer

humus, clay, and sand.

Answer

silt, pebbles, and clay.

Answer

sand, rocks, and clay.

Answer

clay, silt, and rocks.

Question 13

. The finest-grained soils are richest in

Accepted Answer

clay

Answer

sand

Answer

humus

Answer

iron

Question 14

The iron in iron-rich red soils may not be in a form that can be taken up by tree roots. As a result, leaves and needles may look yellow. Some trees release acids that convert iron in soil to a usable form. This change in soil chemistry is a type of which process?

Accepted Answer

weathering

Answer

deposition

Answer

precipitation

Answer

photosynthesis

Question 15

How do the nutrients necessary for plant growth get into the soil?

Accepted Answer

Organic matter is decayed in the soil.

Answer

The soil absorbs sunlight.

Answer

Water filters through the soil.

Answer

The soil is exposed to air.

Question 16

Which soil component has the least capacity for holding water?

Accepted Answer

sand

Answer

silt

Answer

clay

Answer

humus

Question 17

The table shows some of the characteristics of the soil in an area of land. Which characteristic of this area indicates that the soil was formed as a result of the interaction between organisms and their environment?

Accepted Answer

The soil contains humus.

Answer

The area is flat

Answer

The soil color is dark brown.

Answer

The soil feels gritty.

Question 18

. Soil that drains slowly MOST likely has a high amount of

Accepted Answer

clay

Answer

ash

Answer

sand

Answer

peat

Question 19

The diagram below shows two soil samples after a heavy rainstorm. Which property of soil is illustrated in the diagram?

Accepted Answer

relative porosity

Answer

geographic origin

Answer

chemical composition

Answer

nutrient content

Question 20

A glacier retreats leaving bare rocks. Lichens begin to live on the rocks. The lichens produce an acid that starts to break down the rocks. How will this process affect the environment?

Accepted Answer

It will begin the process of building soil.

Answer

It will put acid into the lakes and ponds.

Answer

It will prevent the carbon cycle from occurring.

Answer

It will prevent bacteria from invading the ecosystem.

Question 21

Which statement BEST describes the role of decomposers during the primary succession process?

Accepted Answer

They add organic matter to sand to form rich soil.

Answer

They prevent rock from eroding.

Answer

They break down sand particles.

Answer

They provide food for the plants that will grow.

Question 22

This diagram shows a layer of bedrock under topsoil. How can the type of bedrock under soil affect the characteristics of the soil?

Accepted Answer

by contributing small rock particles to the soil

Answer

by preventing soil erosion

Answer

by absorbing excessive rainwater

Answer

by providing surface area for nutrient accumulation

Question 23

Which graph BEST relates soil particle size to the percent of water able to pass through the soil?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 24

If soil is permeable

Accepted Answer

water easily flows through it.

Answer

water cannot flow through it.

Answer

it contains many minerals.

Answer

it contains few minerals.

Question 25

What is the source of the organic matter needed for MOST fertile soils?

Accepted Answer

decaying plants

Answer

moving water

Answer

eroded sand

Answer

weathered bedrock

Question 26

The texture of soil depends primarily on the

Accepted Answer

composition of the soil

Answer

mass of the soil.

Answer

water in the soil.

Answer

vegetation growing in the soil

Question 27

What should be added to soil to increase its water retention?

Accepted Answer

clay

Answer

pebbles

Answer

sand

Answer

rocks

Question 28

A plant that needs well-drained soil would grow BEST in soil made mostly of

Accepted Answer

sand

Answer

silt

Answer

clay

Answer

humus

Question 29

. Which property BEST indicates that soil contains nutrients?

Accepted Answer

color

Answer

texture

Answer

amount of sand

Answer

amount of clay

Question 30

When microorganisms deplete the oxygen in soil through respiration, the soil becomes

Accepted Answer

anaerobic

Answer

humus

Answer

compost

Answer

aerobic

Question 31

Soil will pack down over time which decreases the ability of the soil to hold water. Which animals would BEST help the soil hold water?

Accepted Answer

earthworms making tunnels under the surface

Answer

cattle making depressions with their hooves

Answer

horses making trenches when they gallop

Answer

sheep pulling up plants by their roots

Question 32

What MOST likely happens to soil when crops are NOT rotated from year to year?

Accepted Answer

The soil nutrients are depleted.

Answer

The soil fertility increases.

Answer

The soil becomes more porous.

Answer

The soil erodes less rapidly.

:6.E.2.3 & 2.4 Weathering & Soil (snet)

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