Fill in the blank. 1. The buildup of sediment where a river empties into a slow-moving or non-moving body of water is known as a/an .

2. A type of soil made almost entirely of windblown sediment is called .

3. The in soil comes from decaying plants and animals and their waste products.

4. , which is made up of tiny particles and drains water very poorly, is one of the main components of soil.

5. A type of soil called peat is most likely to form in a/an .

6. Water helps in the development of soil by carrying and nutrients from upper layers to lower layers.

7. The of nutrients from soil is common in wet environments, like rain forests.

8. Quartz-rich parent material leads to the development of soils.

9. The layers of soil composed mainly of organic matter are known as the and horizon.

10. A layer of soil in which clay, iron, and other elements from the overlying soil accumulates is known as the horizon, or subsoil.

Energy derived from hot rocks and fluids beneath the earth’s surface is

1. the passing of is the basis of heredity. 2. our encode the instructions that define our traits. 3. each of us has thousands of genes, which are made of and reside in our chromosomes. 4. in addition to our genes, the we live in also define our traits. 5. humans have two complete sets of chromosomes. 6. when parents conceive a child, each parent contributes set of chromosomes. 7. every child receives of its chromosomes from the mother and half from the father. 8. this transfer takes place at when the father’s sperm joins the mother’s egg. 9. while most cells in our bodies have two sets of chromosomes, or a total of egg and sperm each have chromosomes. 10. when egg and sperm unite they create a single cell called a 11. each parent contributes complete set of chromosomes to their child. 12. since the parents contribute the chromosomes to each new child, every child inherits a unique set of chromosomes. 13. as a result, every baby will have a combination of traits.

Match the types of competition to their descriptions