Friday, January 30, 2015
The Earth’s Crust
Soil
Once rocks have been weathered into
small enough sediments, soil can begin
to form.
Soil – a mixture
of:
weathered rock
(sediments)
organic matter
(living and dead
material)
minerals
water
and air.
Make up ...
Rock is turned
into sediment and
mineral
fragments by
weathering but it
is not considered
soil until plants
and animals li...
Compost – dead and decaying
plant matter.
Compost mixed
with rocks and
mineral is
called humus,
which forms
the dark
coloured part
of the soil
which is very
fertile.
Fertile soil –
soil that
provides
nutrients for
plant growth.
We add
fertilizers to soil
to make sure it
has all of the
nu...
Plants need three nutrients
to grow properly:
N - nitrogen
P - phosphorus
K - potassium)
Different bags have different amounts of N, P or K depending on what
you need. If you put too much of any one of these che...
Soils can take thousands
of years to form. They
can range in thickness
from 60 meters in some
areas to just a few
centimet...
Soil profile –
a picture of
what the layers
of soil look like
underground.
Soil profiles will look
different from area
to area.
You can make a soil
profile by digging
and exposing a
vertical edge o...
The earths crust soil
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The earths crust soil

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This was created to meet the curriculum outcomes in New Brunswick's Grade 7 Science Earth's Crust Unit.

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The earths crust soil

  1. 1. Friday, January 30, 2015 The Earth’s Crust Soil
  2. 2. Once rocks have been weathered into small enough sediments, soil can begin to form.
  3. 3. Soil – a mixture of: weathered rock (sediments) organic matter (living and dead material) minerals water and air. Make up a memory sentence with actions and write it down in the blank provided.
  4. 4. Rock is turned into sediment and mineral fragments by weathering but it is not considered soil until plants and animals live, die, and decay in it (e.g. leaves, insects, twigs, worms, bacteria, etc)
  5. 5. Compost – dead and decaying plant matter.
  6. 6. Compost mixed with rocks and mineral is called humus, which forms the dark coloured part of the soil which is very fertile.
  7. 7. Fertile soil – soil that provides nutrients for plant growth. We add fertilizers to soil to make sure it has all of the nutrients for plants to grow.
  8. 8. Plants need three nutrients to grow properly: N - nitrogen P - phosphorus K - potassium)
  9. 9. Different bags have different amounts of N, P or K depending on what you need. If you put too much of any one of these chemicals in the soil, it could kill your plants. On the side of a fertilizer bag you’ll see three numbers. Example 15 - 5 – 5 N P K Each number stands for how much nitrogen, phosphorus, or potassium the fertilizer has in it.
  10. 10. Soils can take thousands of years to form. They can range in thickness from 60 meters in some areas to just a few centimeters in others. Soil varies in structure and appearance, depending on its depth. These different layers of soil can be mapped to make a soil profile.
  11. 11. Soil profile – a picture of what the layers of soil look like underground.
  12. 12. Soil profiles will look different from area to area. You can make a soil profile by digging and exposing a vertical edge of the soil or you can drill a core sample using a soil sampler

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