Div. uttrykk

Question 1

NO₃⁻

Answer 1

Nitrate

Question 2

Nitrate

Answer 2

NO₃⁻

Question 3

NO₂⁻

Answer 3

Nitrite

Question 4

Nitrite

Answer 4

NO₂⁻

Question 5

HNO₃

Answer 5

Nitric acid

Question 6

Nitric acid

Answer 6

HNO₃

Question 7

SO₄²⁻

Answer 7

Sulfate

Question 8

Sulfate

Answer 8

SO₄²⁻

Question 9

H₂SO₄

Answer 9

Sulfuric acid

Question 10

Sulfuric acid

Answer 10

H₂SO₄

Question 11

HSO₄⁻

Answer 11

Bisulfate

Question 12

Bisulfate

Answer 12

HSO₄⁻

Question 13

HCO₃⁻

Answer 13

Bicarbonate

Question 14

Bicarbonate

Answer 14

HCO₃⁻

Question 15

CO₃²⁻

Answer 15

Carbonate

Question 16

Carbonate

Answer 16

CO₃²⁻

Question 17

PO₄³⁻

Answer 17

Phosphate

Question 18

Phosphate

Answer 18

PO₄³⁻

Question 19

Soil texture

Answer 19

Distribution of particle sizes (sand, silt, clay)

Question 20

What does soil texture affect?

Answer 20

• Permeability
• Water retention
• Suitability for different plants
• CEC

Question 21

Bulk density

Answer 21

the mass of soil per unit volume, including both the solid particles and the pore spaces

Question 22

Particle density

Answer 22

The density of the solid particles that make up the soil

Question 23

Pore-size distribution

Answer 23

Percentage of pore sizes

Understanding pore-size distribution helps in soil management, irrigation practices, and predicting soil behavior under various conditions.

Question 24

Wilting point

Answer 24

The soil moisture level at which plants can no longer extract water

represents the lower limit of available water for plants.

Question 25

- Adhesion forces

Answer 25

The **attraction between water molecules and solid surfaces**, such as soil particles. **Water molecules are attracted to the charged surfaces of soil particles**, leading to the adhesion of water to the soil matrix.

Question 26

- Cohesion forces

Answer 26

The attraction between water molecules themselves. This is due to hydrogen bonding.

Question 27

- Capillary action

Answer 27

Water moves upward through the soil against gravity, supplying moisture to plant roots.

Question 28

What forces causes water film around soil particles?

Answer 28

Adhesion forces

Question 29

Which forces contribute to capillary action?

Answer 29

Ad-/cohesion forces

Question 30

Volatility

Answer 30

The **tendency of a substance to vaporize or evaporate** Volatile compounds have a **high vapor pressure** at a given temperature, meaning they **can evaporate quickly**

Question 31

10¹⁵

Answer 31

SI prefix: **Peta (P)** *Standard form: 1 000 000 000 000 000 Name: **One quadrillion (Billiard)** (million x million = 1000 x trillion)*

Question 32

Peta (P)

Answer 32

10¹⁵

Question 33

10¹²

Answer 33

SI prefix: **Tera (T)** *Standard form: 1 000 000 000 000 Name: **One trillion (billion)** (1000 x million)*

Question 34

Tera (T)

Answer 34

10¹²

Question 35

10⁹

Answer 35

SI prefix: **Giga (G)** *Standard form: 1 000 000 000 Name: **One billion (milliard)***

Question 35

Giga (G)

Answer 35

10⁹

Question 36

10⁶

Answer 36

SI prefix: **Mega (M)** *Standard form: 1,000,000 Name: **One million***

Question 37

Mega (M)

Answer 37

10⁶

Question 38

10⁻³

Answer 38

SI prefix: **Milli (m)** *Standard form: 0.001 Name: One thousandth 1/1000*

Question 39

milli (m)

Answer 39

10⁻³

Question 40

10⁻⁶

Answer 40

SI prefix: micro (µ) *Standard form: 0.000 001 Name: One millionth 1/million*

Question 41

micro (µ)

Answer 41

10⁻⁶

Question 42

10⁻⁹

Answer 42

SI prefix: **Nano (n)** *Standard form: 0.000 000 001 Name (English): one billionth*

Question 43

Nano (n)

Answer 43

10⁻⁹

Question 44

10⁻¹²

Answer 44

SI prefix: **Pico (p)** *Standard form: 0.000000000001 Name: One trillionth*

Question 45

Pico (p)

Answer 45

10⁻¹²

Question 46

H₂CO₃ (HCO3)- (CO3)2-

Answer 46

Carbonic acid Bicarbonate Carbonate