SoilBy Gavin Thomas / November 30, 2023 Welcome to your Soilwatch video before starting the quiz Name Your teacher's Email Your school 1. What is soil that contains decayed plants and animal matter? horizon topsoil subsoil humus None 2. What is a vertical section of soil that includes all layers from the topsoil to the bedrock? horizon soil profile subsoil porous None 3. You dig a small hole in the soil and the next day it rains. The hole fills with water, but does not empty even after several days of dry weather. What is the soil mostly made of? clay humus sand silt None 4. The texture of soil depends mainly on the types of plants that grow in the soil. the size of the particles in the soil. the color of the soil. the number of worms in the soil. None 5. Many plants cannot grow in sandy soil. Why is this true? Sandy soil does not hold enough water. Oxygen cannot pass through sandy soil. Roots cannot easily push through clay soil. Sandy soil has too many nutrients. None 6. Which plant does not grow well in sandy soil ? carrot pine apple bora cactus None 7. Which type of soil can hold the greatest amount of water? Sand, because it has the biggest particles. Silt, because its particles are smaller than sand. Clay, because its particles are very small. Loam, because it is a combination of different types of soil. None 8. Where do most plants and animals live? Subsoil Topsoil Bedrock Loam None 9. Why is soil so important? because it provides food and habitat for organisms because plants cannot grow without it because it covers earth because animals eat it None 10. Which horizon has humus ? horizon A horizon O horizon B horizon C None 11. Which horizon has dead leaves ? horizon A horizon O horizon B horizon C None 12. Which horizon earthworm lives ? horizon A horizon O horizon B horizon C None 13. This diagram shows soil layers which is the most fertile ? subsoil topsoil bedrock None 14. What can you see in a soil profile?a. Different layers of the soil.b. Different types of rocks.c. Different types of plants.d. Different types of animals. a b c None 15. What is the most useful part of the soil? a. Topsoilb. Subsoilc. Substratumd. Bedrock a b c d None 16. What is the color of the topsoil? a. Darkb. Lightc. Redd. Green a b c d None 17. What is the bedrock? a. The layer of soil just below the subsoil.b. The layer of soil just below the topsoil.c. The layer of soil just below the substratum.d. The solid rock layer beneath the soil. a b c d None Time's up
