Soils

Question 1

Sandy Soils

Answer 1

• range from about 0.15 to 0.30 mm in diameter
• air spaces are quite large
• can be tested b taking a handful of soil and squeezing all together. If it crumbles and falls, it’s a sign that it is sandy.

Question 2

Clay soils

Answer 2

• 0.002 mm in diameter
• air gaps are extremely small
• sticky feature
• formed in a ‘sausage’ shape

Question 3

Loam soil

Answer 3

• midway in size between sand and clay

- air gaps are sufficiently small to hold water long enough to allow plant root systems to absorb it.

Question 4

Universal Indicator

Answer 4

• determines whether the liquid is an acid, alkali or neutral.

Question 5

pH scale

Answer 5

• pH (potential hydrogen)

- numeric scale that measures acidity

Question 6

Numbers that indicate strong and weak acids, neutral and strong and weak alkali.

Answer 6

• 1 2 and 3 - Strong acids
• 4 5 and 6 - Weak acids
• 7 is neutral
• 11 12 13 and 14 - Strong alkali
• 8 9 and 10 - Weak alkali