WorksheetsSoil
Total questions: 16
Worksheet time: 9mins
Soil is important because...
is a medium for plant growth.
serves as a filter for water.
is a habitat for living organisms.
serves as a filter for pollutants.
The major nutrients that plants need are..
Nitrogen, Potassium, Calcium
Nitrogen, Carbon dioxide, Oxygen
Nitrogen, Potassium, Phosphorus
Phosphorus, Titanium, Nitrogen
In the presence of plenty of oxygen..
aerobic decay occurs and nitrogen is converted into nitrate ions
anaerobic decay occurs and nitrogen is converted into nitrate ions.
aerobic decay occurs and nitrogen is converted into ammonium ions then to nitrate ions.
aerobic decay occurs and nitrogen is converted into ammonium ions.
If insufficient oxygen is present..
anaerobic decay occurs forming nitrate ions.
aerobic decay occurs forming ammonium ions.
anaerobic decay occurs forming ammonium ions.
aerobic decay occurs forming nitrate ions.
A hardpan is..
soil that is rich in nutrients and clay
hardened impervious soil layer
a pan made out of hard chemicals.
the fancy name of cracked soils
Why does the available form of nitrogen readily leach from the soil?
Plants do not need as much.
Animals consume nitrogen more than they need.
The form of nitrogen present is not always soluble.
The form of nitrogen present is not held on by the soil.
What can effect the nutrient uptake in plants?
Sufficient quantities of nutrients available in the soil.
Adequate soil moisture.
A well developed root system.
Soil temperature not too hot or not too cold.
How is lime used to regulate pH?
Makes the soil more acidic
It increases the pH
It decreases the pH
Makes the soil more alkaline
What causes eutrophication?
no sunlight
low oxygen
Algae
excess nutrients in water
Why is excess growth of algae is a problem?
It blocks the sunlight.
It smells
It can be used as a food resource for other organisms
It uses the nutrients needed for plants underwater
Which of these is a source of nutrients flowing into the water sources?
Sewage
Agriculture
Industrial waste
Animal waste
Water pollution that leads to eutrophication is caused by..
zeolites
fertilizers
deterents
DDT
What is the main source of Nitrogen?
Ocean
Organisms
Atmosphere
Soil
What is the name of the process that fixes Nitrogen into Ammonia?
Nitrification
Denitrification
Nitrogen Fixation
Ammonia Fixation
Which of the following plays a role in Nitrogen Fixation?
Waterfalls
Rocks
Hurricane
Lightning
Nitrogen makes up..
78% of the atmosphere.
90% of the atmosphere.
71% of the atmosphere.
53% of the atmosphere.
