Fresh and Salt Water Systems
Alberta Topic D: Fresh and Salt Water Systems.
17 questions, free, marked as you go with a worked explanation on every one.
What this covers
- fresh and salt water systems
The questions
- What percentage of Earth's water is approximately fresh water?
- The area of land that drains into a particular river or lake is called a:
- A place where fresh river water mixes with salt ocean water is called a(n):
- Water that collects and is stored underground is called:
- A river flowing through a watershed carries 2.5 cubic metres of water past a monitoring station every second. How many cubic metres of water flow past the station in one hour?
- Why does ice float on liquid water?
- Which process removes dissolved salt from seawater to make it drinkable?
- A rain barrel collects 45 L of water over 3 days. At the same rate, how many litres would it collect in 30 days?
- Use the table. Where is most of Earth's fresh water actually stored?
- An underground layer of rock or sediment that holds and allows water to flow through it is called a(n):
- A wetland near farmland is found to remove excess nutrients and trap sediment before water reaches a lake. This role of a wetland is best described as:
- In summer, a deep lake often separates into a warm upper layer and a cooler lower layer that do not mix. This layering by temperature is called:
- A family uses 250 L of water per day. At that rate, how many litres does the family use in a 7-day week?
- A town pumps groundwater out of an aquifer faster than rain and snowmelt can refill it. Over many years, this is most likely to cause:
- A water quality test finds a lake's pH is 5.5, while pure water has a pH of 7. Compared to pure water, this lake's water is:
- Permafrost under an Alberta wetland has been thawing, releasing water that used to stay frozen underground. If this adds an extra 15 percent to a stream's usual yearly flow of 400 million cubic metres, how many million cubic metres does the stream carry in that year?
- A lake's fresh surface water sits on top of denser salt water below it, and the two layers barely mix. What causes salt water to settle below fresh water like this?