1. To a scientist, a river is a kind of stream. True or False.
2. All streams carry sediment. T/F.
3. A delta keeps growing. T/F.
4. Heavy rain always cause flooding. T/F.
5. A river bank is at the end of a river. T/F.
1. To answer whether a river is a kind of stream, we need to understand the definitions of both terms. A stream is a general term for a body of flowing water, which includes rivers, creeks, and brooks. On the other hand, a river is a large, flowing body of water that usually flows into another river, lake, or ocean. Considering this, we can say that a river is indeed a type of stream. Therefore, the statement is True.
2. To determine whether all streams carry sediment, we can consider the definition of sediment. Sediment refers to particles of solid material that are transported and deposited by flowing water. While most streams do carry some amount of sediment, there are cases where some streams may not carry any significant amount of sediment. For instance, streams in arid regions or those with steep slopes may have limited sediment or none at all. Thus, the statement is False.
3. When it comes to whether a delta keeps growing, we can examine the formation and characteristics of a delta. A delta is a landform that forms at the mouth of a river as it flows into a larger body of water, like a lake or an ocean. Deltas are formed due to the accumulation of sediment carried by the river, which gradually builds up land over time. Therefore, it is generally true that a delta keeps growing as the river continues to deposit sediment at its mouth. Thus, the statement is True.
4. Whether heavy rain always causes flooding depends on various factors. While heavy rain is often associated with an increased risk of flooding, it does not necessarily guarantee flooding in all situations. Several factors play a role, such as the duration and intensity of rainfall, the capacity of the river or stream, the geography of the area, and existing drainage systems in place. In some cases, heavy rain may be absorbed by the ground or effectively drained away, reducing the likelihood of flooding. Therefore, the statement is False.
5. In terms of the position of a river bank, it is not necessarily strictly at the end of a river. A river bank refers to the land located on either side of a river, which helps contain the water within the river channel. It runs alongside the river rather than marking its endpoint. The start and end of a river are generally referred to as the source and mouth respectively. Thus, the statement is False.