Transcript Changes of soil

TEK 4.10A
Identify and observe effects of
events that require time for
changes to be noticeable
including growth, erosion,
dissolving, weathering, and
flow.
1
Which statement is true about soil?
2
A.Soil can evaporate into air.
B.Soil can change into water.
C.Soil contains only small
pieces of rock.
D.Soil contains small pieces of
plants, animals and rocks.
3
The correct answer is D.
Soil is composed of small pieces
of plants, animals and rock.
These pieces have broken down
into smaller parts from larger
objects due to weathering,
dissolving and erosion. All of
these processes take time.
4
These answers are incorrect
because...
A. Soil is composed of solids that
can’t evaporate into the air.
B. The solids that make up soil
can’t magically change into
water.
C. Small pieces of rock are only
one part of the soil mixture
5
What will probably happen to
the soil in the picture if
heavy rains should occur?
6
A. The soil will turn to rock.
B. The soil will wash away with the
run off.
C. The rocks will stop the water
from flowing.
D. Grass will immediately replace
the dirt.
7
The correct answer is B.
The soil will get carried away
with the water that runs down
the hill. This is an example of
erosion.
8
These answers are incorrect
because:
A.It takes millions of years for soil
to turn into rock.
C. The rocks will not stop the flow
of water they too will eventually
be moved by running water.
D. Grass seeds would first have to
be planted and it would take time
for the grass to grow.
9
Baby
Adult
As this animal grows into an adult
what change would be most
noticeable?
10
A.The eyesight of the animal.
B.The number of legs the animal
uses to walk.
C.The coloring of the fur.
D.The place where the animal
lives.
11
The correct answer is C.
The best answer is C
because as the fawn grows,
its fur will lose the spots
and become a solid brown
color. The fawn uses the
spots as camouflage when
it’s too little to run from
its enemies.
12
The other answers are incorrect
because…
A.The animal’s eyesight will not
change drastically.
B.The number of legs the animal
walks on won’t change.
D. The animal will continue to live in
the habitat where it was born
unless forced to move.
13
What do the pictures above
show about the solubility of
sugar and pepper?
14
A. Sugar is soluble in water
but pepper is not.
B. Pepper is soluble in water
but sugar is not.
C. Pepper and sugar have
the same solubility.
D. If stirred the pepper
would have the same
solubility of sugar.
15
The correct answer is A.
The sugar has completely
dissolved in the water and
the molecules in the sugar
are now surrounded by the
water molecules.
16
These answers are incorrect
because...
B. The pepper has not dissolved in
the water and is still visible.
C. If the pepper had the same
solubility as the sugar then it
would also not be visible.
D. The physical properties of the
pepper prevent it from
completely dissolving in the
water no matter how much it is
stirred.
17
What is the correct sequence of
the development of this river
delta?
18
A. W, X, Y, Z
B. Z, W, Y, X
C. X, Z, Y, W
D. Y, Z, X, W
19
The correct answer is C.
The delta is formed gradually
as sediment is deposited by the
flowing water at the mouth of
the river. As the soil builds up
the water must find new ways
to reach the lake by cutting
through the delta in different
paths.
20
The other answers are incorrect
because…
A, B and D don’t show the delta
getting gradually larger. They
show the development of the
delta out of sequence.
21