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Chemistry, Biology, Science
10th
grade
Environmental Factors Affecting Plant Growth
21 questions
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- 1. Multiple Choice
Which layer of soil contains lots of roots and minerals for growing plants?
Topsoil
Subsoil
Bedrock
Parent Material
- 2. Multiple Choice
True or False: The layers of soil go in this order: Topsoil, bedrock, subsoil.
True
False
- 3. Multiple ChoiceIdentify the soil horizon:
Consists of topsoil (mostly sand and some clay) rich in humus (O horizon) and leached soil deficient in humus and minerals.O horizonA horizonB horizonC horizon - 4. Multiple Choice
Peter wants to grow some sweet peppers in his garden. He tests the pH of the soil and finds that the pH is very low. What can he do to increase the pH?
Add Fertilizer
Add Manure
Add Limestone
Water the soil
- 5. Multiple Choice
True or False: A pH of 14 would be too basic for a plant to survive.
True
False
- 6. Multiple Choice
What is the best pH range for plants to grow in?
1-7
5.5 – 7.5
7-10
10+
- 7. Multiple ChoiceSoil is made ofweathered rocks and mineralsdead plants and animalsair and waterall of the above
- 8. Multiple Choice
What do we call the layers of soil?
Deposits
Horizons
Minerals
Rocks
- 9. Multiple Choice
The very top layer of soil is mostly made of
Solid rock
Clay and mineral deposits
A mixture of minerals and organic material
Mostly organic material (OM)
- 10. Multiple ChoiceWhat does weathering mean?To form or create newTo build upTo break downTo completely destroy
- 11. Multiple Choice
Which horizon is made up of partially weathered rocks?
Horizon A
Horizon B
Horizon C
Bedrock
- 12. Multiple Choice
Duncan went to buy some fertilizer for his lettuce crop. The shopkeeper told him that he should buy a fertilizer high in Nitrogen (N). Why did the shopkeeper recommend this?
Lettuce is a leafy crop and leafy crops require more Nitrogen (N)
Nitrogen (N) is important for flowering crop and lettuce is a flowering crop
Nitrogen (N) is important for root development and lettuce is a root crop
Nitrogen is the most important nutrient
- 13. Multiple Choice
Soil is formed from..........
The weathering of rocks or parent material
From the eruption of volcanoes
From the dust in the air as it settles on the earth
From material brought down from the mountains
- 14. Multiple Choice
The three different types of weathering are .....
Man made, Natural and Synthetic
Physical, Mechanical and Chemical
Chemical, Physical and Biological
Water, Air and Plant
- 15. Multiple Choice
Three agents of Physical Weathering are.....
Temperature, Abrasion by water/wind/ice, Plants & Animals
Water, Wind, Plants
Man, Waves, Sand
Carbonation, Hydrolysis, Oxidation
- 16. Multiple Choice
Which Chemical weathering process produces "Rust" in the soil?
Hydrolysis
Carbonization
Hydration
Oxidation
- 17. Multiple Choice
Three types Chemical Weathering are..........
Nitrogen, Potassium, Phosphorus
Wind, Water, Ice
Oxidation, Carbonization, Hydrolysis
Biological, Physical, Chemical
- 18. Multiple Choice
N:P:K stands for......
Nutrient , Physical, Portion
Nutrient , Partition , Phase
Nitrogen, Parameter , Placement
Nitrogen , Phosphorus, Potassium
- 19. Multiple Choice
Farmer Akeem has a Cassava crop, he uses a fertilizer that is high in Phosphorus. Why is this so?
Because cassava is a root crop and phosphorus helps with root development
Because Phosphorus is the cheapest of all fertilizers
Phosphorus will help the cassava grow fastest
Phosphorus will help the leaves develop
- 20. Multiple Choice
Nitrogen, Phosphorus and Potassium are called Macronutrients because?
They help the plant grow
Plants need them in high amounts
Plants need them in low amounts
Plants don't need them
- 21. Multiple Choice
Farmer Alex has a tomato crop that is ready to flower then fruit , another farmer Kim advises him to use a fertilizer high in Potassium, why does she say this?
Potassium is relatively cheap
Potassium is important in the formation of flowers and fruits
Potassium is a Macro Nutrient
Potassium is an important nutrient
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