Science Unit Test on Soil

3.7 & 3.10

The carrying of weathered pieces of rock by wind, water, and gravity

is

wea

ther

ing

ero

sion

eva

poratio

n

33% 33%33%

1. weathering

2. erosion

3. evaporation

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The breaking down of rock into smaller pieces, such as sand, silt or

clay is

conse

rvat

ion

ero

sion

wea

ther

ing

33% 33%33%1. conservation

2. erosion

3. weathering

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Land surfaces that are not covered with plants…

Are

less

like

ly to

lose

...

Are

more

like

ly to

los.

..

Hav

e th

e sa

me

likel

i...

33% 33%33%1. Are less likely to

lose soil through erosion

2. Are more likely to lose soil through erosion

3. Have the same likelihood of losing soil as land surfaces that are covered with plants

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Which of the following is not a normal part of soil?

rock s

ilt

san

d

gla

ss

25% 25%25%25%1. rock

2. silt

3. sand

4. glass

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Plants grow better in which type of soil?

san

d c

lay

tops

oil

subso

il

25% 25%25%25%1. sand

2. clay

3. topsoil

4. subsoil

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21 22 23 24 25 26 27 28 29 30

What is formed when freezing water cracks rocks apart?

Silt

or s

and

foss

ils

Gem

s or m

etal

s

tops

oil

25% 25%25%25%1. Silt or sand

2. fossils

3. Gems or metals

4. topsoil

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Why is it important to protect topsoil?

It p

rote

cts

subs

oil

It is

nec

essa

ry fo

r la.

..

It g

row

s pla

nts a

nd food

It c

osts

a lo

t to m

anuf..

.

25% 25%25%25%1. It protects subsoil

2. It is necessary for landscaping

3. It grows plants and food

4. It costs a lot to manufacture

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What is topsoil made of?

Met

als

and d

ead p

lants

Wea

ther

ed ro

ck a

nd...

Gem

s an

d ore

s

Wea

ther

ed ro

ck a

nd...

25% 25%25%25%1. Metals and dead plants

2. Weathered rock and humus

3. Gems and ores

4. Weathered rock and ores

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Why do plants and animals depend on soil?

Soil

is n

eeded

to w

al...

Soil

provi

des a

ir fo

r ...

Soil

provi

des s

uppor..

.

Soil

is n

eeded

for a

ni...

25% 25%25%25%1. Soil is needed to walk on

2. Soil provides air for animals to breathe

3. Soil provides support and nutrients for the animals to eat

4. Soil is needed for animals to sleep on

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What is soil erosion?

Topso

il co

vere

d with

...

Pla

nts d

ie fo

r lac

k of

...

Topso

il is

car

ried a

w..

Too m

uch fe

rtiliz

er i.

..

25% 25%25%25%1. Topsoil covered with chemicals

2. Plants die for lack of water in soil.

3. Topsoil is carried away by wind and water

4. Too much fertilizer is used, hurting crops

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Soil provides plants with which of the following?

roots

oxy

gen

suppor

t

hea

t

25% 25%25%25%1. roots

2. oxygen

3. support

4. heat

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Soil is made up of

Rock

, cla

y, p

last

ic, .

..

San

d, met

al, a

nd cl

ay

Rock

, cla

y, s

ilt, s

and,..

.

33% 33%33%1. Rock, clay, plastic, and wood

2. Sand, metal, and clay

3. Rock, clay, silt, sand, and humus

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Materials that plants need to live and grow are…

Nutri

ents

Bed

rock

San

d and

rock

33% 33%33%1. Nutrients

2. Bedrock

3. Sand and rock

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Which layer of soil has the most nutrients?

bed

rock

subso

il

tops

oil

33% 33%33%1. bedrock

2. subsoil

3. topsoil

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The pieces of decayed plants and animals in soil are called

hum

us

subso

il

cla

y

33% 33%33%1. humus

2. subsoil

3. clay

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The layer of rock beneath the subsoil and loose rock is

bed

rock

tops

oil

hum

us

33% 33%33%1. bedrock

2. topsoil

3. humus

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The process of making soil takes many

day

s

mon

ths

yea

rs

33% 33%33%1. days

2. months

3. years

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Which of the following is NOT a way of conserving soil?

Pla

nting

the

sam

e cr

...

Conto

ur p

lowin

g a

field

Pla

nting

new y

oung ...

Rota

ting th

e cr

ops p...

25% 25%25%25%1. Planting the same crops every year in a field

2. Contour plowing a field

3. Planting new young trees (seedlings) after cutting down trees for lumber

4. Rotating the crops planted in a field regularly

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Which layer has the most nutrients?

A B C

33% 33%33%1. A

2. B

3. C

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Which layer has the most non-living material?

A B C

33% 33%33%1. A

2. B

3. C

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