Terrestrial Unit Review 2022

Where can plants get ALL of their essential nutrients from?

• Air

• Water

• Soil

• Photosynthesis

What is responsible for converting most of the nitrogen used by plants into usable form?

• Lightning

• Bacteria

• Synthetic Fertilizer

• Fungi

Legumes are plants that house special _______________-fixing bacteria!

• Phosphorus

• Calcium

• Carbon

• Nitrogen

The smallest soil particle is:

• Sand

• Loam

• Clay

• Silt

True or False. Sand-based soils require high levels of nutrient application.

• True

• False

True or False. Soils with small particle sizes and pores have the lowest water holding capacity

• True

• False

Weathering is the breaking down of parent materials (ex: rocks)…

• True

• False

What role does pH play in soil and plant health?

• Causes erosion

• Affects the uptake of nutrients

• Causes decomposition

50% of soil is…

• Water & Air

• Inorganic Matter

• Organic Matter

• Insects

The “O” in O Horizon (Litter Layer) stands for…

• Organisms

• Over

• Organic

• Overgraze