# Glencoe Earth Science

## Chapter 7: Weathering and Soil

### Calculate Percentages

 1 Horizons are the top layer of soil that form a soil profile. The A Horizon is known as topsoil. The B Horizon has less organic matter than the layer above it. And the C Horizon is the lowest level of soil containing partially weathered rock. Use the circle graph to calculate the percentage of A Horizon found in the sample. (2.0K) A) 43.75% B) 25% C) 18.75% D) 56.25% 2 Horizons are the top layer of soil that form a soil profile. The A Horizon is known as topsoil. The B Horizon has less organic matter than the layer above it. And the C Horizon is the lowest level of soil containing partially weathered rock. Use the circle graph to calculate the percentage of B Horizon found in the sample. (2.0K) A) 18.75% B) 25% C) 56.25% D) 43.75% 3 Horizons are the top layer of soil that form a soil profile. The A Horizon is known as topsoil. The B Horizon has less organic matter than the layer above it. And the C Horizon is the lowest level of soil containing partially weathered rock. Use the circle graph to calculate the percentage of C Horizon found in the sample. (2.0K) A) 56.25% B) 18.75% C) 25% D) 43.75% 4 Horizons are the top layer of soil that form a soil profile. The A Horizon is known as topsoil. The B Horizon has less organic matter than the layer above it. And the C Horizon is the lowest level of soil containing partially weathered rock. Use the circle graph to calculate the percentage of A and B Horizon found in the sample. (2.0K) A) 56.25% B) 18.75% C) 25% D) 43.75% 5 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of phosphorus in the sample. (3.0K) A) 12.5% B) 37.5% C) 25% D) 9.375% 6 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of potassium in the sample. (3.0K) A) 12.5% B) 25% C) 37.5% D) 45% 7 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of sulfur in the sample. (3.0K) A) 25% B) 12.5% C) 37.5% D) 45% 8 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of calcium in the sample. (3.0K) A) 37.5% B) 12.5% C) 25% D) 9.375% 9 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of magnesium in the sample. (3.0K) A) 25% B) 9.375% C) 12.5% D) 3.125% 10 Plants use nutrients like nitrogen, phosphorus, potassium, sulfur, calcium, and magnesium to grow. These nutrients are present in soil at different levels. A soil chemist analyzed a soil sample to determine the weights of each nutrient. Use the circle graph to determine the percentage of nitrogen in the sample. (3.0K) A) 37.5% B) 25% C) 12.5% D) 9.375%