Science - 2018-19
6.5 c-f - Properties of Water
The student will investigate and understand the unique properties and characteristics of water and its roles in the natural and human-made environment. Key concepts include
c) the action of water in physical and chemical weathering;
d) the ability of large bodies of water to store thermal energy and moderate climate;
e) the importance of water for agriculture, power generation, and public health; and
f) the importance of protecting and maintaining water resources.
Bloom's Levels: Analyze; Understand
- Water plays an important role in the ecosystem, weathering, climate, and supporting human life.
- Both human activities and natural events can have major impacts on the environment.
- I can design a statue that will withstand weathering damage caused by water.
- I can plan a vacation to the beach with the warmest ocean temperature during a certain time of the year.
- I can create a layout of a new town so that water resources are used to their full potential.
- I can develop a water conservation plan in case of a drought in the area.
UNDERSTANDING THE STANDARD
- Water is able to absorb thermal energy without showing relativel large changes in temperature. Large bodies of water act to moderate the climate of surrounding areas by absorbing thermal energy in summer and slowly releasing that energy in the winter. For this reason, the climate near large bodies of water is slightly milder than areas without large bodies of water
- Water (rain, ice, snow) has shaped our environment by physically and chemically weathering rock and soil and transporting sediments. Freezing water can break rock without any change in the minerals that form the rock (physical weathering). This usually produces small particles and sand. Water with dissolved gases and other chemicals causes the minerals in rocks to be changed, leading to the deterioration of the rock (chemical weathering).
- Water is essential for agriculture. Crops watered by reliable irrigation systems are more productive and harvests more dependable.
- Water is an important resource used in power generation. Hydroelecric power plants make use of the kinetic energy of water as it flows through turbines. Water is also heated in power plants and turned to steam. The steam is used to turn turbines, which generate electricity.
- In the past, streams and rivers were often used to dispose of human waste, and open sewers were common. During the mid-1800's, public health officials recognized the connection between disease outbreaks and contamination of public wells and drinking water. Advances in water treatment and sanitary sewers have helped eliminate diseases associated with human waste.
- Due to water's importance in power generation, agriculture, and human health, it is important to conserve water resources.
In order to meet this standard, it is expected that students will
design an investigation
to model the action of freezing water on rock material.
design an investigation to model the action of acidified water on building materials such as concrete, limestone, or marble.
chart, record, and describe evidence of chemical weathering in the local environment.
d) analyze and explain the difference in average winter temperatures among areas in central and western Virginia and cities and counties along the Chesapeake Bay and Atlantic coast.
e) design an investigation to determine the presence of water in plant material (e.g., a fruit).
infer how the unique properties of water are key to the life processes of organisms.
explain the role of water in power generation.
f) describe the importance of careful management of water resources.