NS SOIL

Question 1

what is the center of the earth called

Answer 1

molten (melted rock into liquid)

Question 2

what is the other layer of the earth called

Answer 2

crust (= rocks and soil)

Question 3

how thick is the crust?

Answer 3

between 4-8 km

Question 4

what are the remains of animals and dead plants called that we find inside rock

Answer 4

fossils

Question 5

what is humus

Answer 5

dead plant and animal material

Question 6

what are the substances called that help plants and animal grow and are found in soil

Answer 6

nutrients

Question 7

what is the rich soil filled with nutrients called?

Answer 7

topsoil

Question 8

what is the land made up from?

Answer 8

rocks, topsoil and subsoil

Question 9

what is soil

Answer 9

rock that has been broken down into small particles

Question 10

what supports life on earth?

Answer 10

water, rock, soil, air

Question 11

explain how all living things depend on soil

why do we say that soil supports life on earth

Answer 11

All living things needs plants to make food. Plants need soil to grow

Question 12

name 2 purposes of soil

Answer 12

source of nutrients and hold the plants in place

Question 13

what is subsoil

Answer 13

the layer of soil below topsoil

Question 14

what does weathered mean

Answer 14

been broken down into small particles

Question 15

what is soil made up off?

Answer 15

weathered rock (broken down pieces), humus (remains of dead plants and animals), air, water

Question 16

name some living things in soil

Answer 16

plants, worms, small insects

Question 17

true or false: the more humus (dead plant parts) soil has, the more fertile

Answer 17

true

Question 18

why is topsoil darker?

Answer 18

it contains more humus

Question 19

what is topsoil made up off?

Answer 19

living and dead plant and animal matter, minerals, nutrients, air and water

Question 20

how can farmers know if the soil is fertile?

Answer 20

they can feel the soils quality and they can smell

Question 21

what will the smell say?

Answer 21

if it has a strong smell, there are more nutrients (from dead plants and animals)

Question 22

what are some characteristics of top soil?

Answer 22

darker, easily washed away by water, between 5 cm-20 cm thick, contains nutrients

Question 23

what is soil erosion

Answer 23

when topsoil is lost

Question 24

how can topsoil be lost? (how does erosion happen?)

Answer 24

when wind blows it away or water washes it away

Question 25

why should we take care of topsoil?

Answer 25

it takes long to form

Question 26

where does the topsoil come from?

Answer 26

from rocks broken down into tiny particles over a long period of time, mixed with dead plant parts

Question 27

what 3 main soil types are there?

Answer 27

sand, clay, loam

Question 28

say something about sandy soil

Answer 28

loose, coarse big particles, rough. cannot be rolled into a ball. light in color. lets water through

Question 29

say something about clayey soil

Answer 29

small, fine particles, smooth, thick texture. easy rolled into a ball. Does not let water through, very dark brown

Question 30

say something about loam

Answer 30

mixture of sand, clay and other particles so mixes sizes, let some water through, medium dark brown,

Question 31

allowing water to pass through

Answer 31

drainage

Question 32

do page 209 with mom

Answer 32

……

Question 33

do page 215 with mom

Answer 33

……

Question 34

Do page 216 with mom

Answer 34

……

Question 35

How can you increase humus in soil and make it more fertile

Answer 35

spread animal poo or dead plant material onto the soil

Question 36

what is the word for the process when the body/plant breaks down into smaller parts?

Answer 36

decompose

Question 37

Study page 14 on worksheet (name soils)

Answer 37

….

Question 38

What do you call it when we use resources carefully so they last?

Answer 38

conserve