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Water 3
6th Grade Science: Unit 4 - Rivers & Icebergs
| Question | Answer |
|---|---|
| What is a waterspout? | A waterspout is a funnel-shaped column of air and water mist that forms over water |
| What happens when a tornado hits water? | A tornado moves over land and when it hits water, it becomes a "waterspout." |
| How many icebergs form every year from Greenland? | About 40,000 |
| What percent of an iceberg is visible? | 10% - The majority of an iceberg's volume is below the waterline |
| What percent of an iceberg is submerged below the waterline? | 90% |
| What part of an iceberg is a danger to ships? And why? | The underwater part of an iceberg is a danger to ships because it is often much larger than the visible part of the iceberg |
| When was the International Ice Patrol (IIP) established? | after the sinking of the Titanic in 1912 |
| What does the International Ice Patrol (IIP) do and how do they do it? | They track icebergs in the North Atlantic, follow and predict their drift, and issue warnings to ships in the vicinity They use planes equipped with radar that can detect icebergs |
| How does water move on Earth’s surface? | Water moves on Earth's surface primarily through: 1- runoff (flowing across land), 2- streamflow (moving in rivers and streams), 3- snowmelt (water from melting snow), and 4- infiltration (soaking into the ground) |
| What happens to precipitation that falls on Earth’s surface? | Precipitation falls on Earth's surface and can: infiltrate into the Earth, meaning it soaks into the ground and becomes groundwater |
| What does the rain do to the rocks & soil? | rain can erode the rocks and soil, which forms a stream or creek |
| What is a tributary? | A tributary is a smaller stream that feeds into a river and eventually into a river system |
| What is a watershed? | A watershed is the area of land that is drained by a river system |
| What contribute water to a watershed? | Streams, rivers, flood plains, lakes, ponds, wetlands, and groundwater all contribute water to a watershed |
| What is a drainage divide? | Watersheds are separated from one other by a ridge or an area of higher ground called a drainage divide |
| What is the largest watershed in the United States? | The Mississippi River watershed - It has hundreds of tributaries. |
| How far does the largest watershed in the US extend? | The Mississippi River watershed extends from the Rocky Mountains to the Appalachian Mountains |
| Name 3 factors that affect the flow of water in a watershed | 1 - Vegetation cover 2 - Porosity and permeability of rocks and sediment 3 - Slope of the land |
| How does vegetation cover affect the flow of water in a watershed? | Vegetation cover slows runoff and reduces erosion. |
| How does porosity and permeability of rocks and sediment cover affect the flow of water in a watershed? | Porosity and permeability of rocks and sediment determine how much water can seep down into the ground. |
| How does slope of the land affect the flow of water in a watershed? | Slope of the land affects how fast water flows over a watershed. |
| Define gradient / slope. | Gradient (slope) is a measure of the change in elevation over a certain distance |
| What is river discharge? | A river’s discharge is the amount of water that moves through the river channel in a given amount of time |
| Define stream load. | Stream load is the term for the materials carried by a stream |
| Describe the stream load for faster streams. | Faster streams can carry larger particles -- a larger stream load |
| Where do streams eventually deposit their stream loads? | Streams eventually deposit their stream loads where the speed of the water decreases (in a lake or ocean) |
Created by:
Engle Family
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