Chapter Test: Water - CTET & State TET MCQ

Salinity is measured by the amount of sodium chloride found in 1,000 grams of water, if there is 1 gram of sodium chloride in 1,000 grams of water solution it is 1 part per thousand.

The Dead Sea is located in Israel. It is a landlocked salt lake bordered by Jordan to the east and Israel and the West Bank to the west. The high salinity of the Dead Sea prevents most aquatic life from thriving in its waters.

The total volume of water on Earth is estimated at 1.386 billion km³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water. Of the fresh water, only 0.3% is in liquid form on the surface.

 The freshwater resources, such as water falling from the skies and moving into streams, rivers, lakes, and groundwater, provide people with the water they need every day to live.

Winds flow in the atmosphere/air above the surface of the earth.

Waves are formed when the water on the surface of the ocean rises and falls alternately. It is formed when winds scrape across the ocean surface. The stronger the wind blows, the bigger the waves become.

The term fresh water possibly includes water in ice sheets, ice caps, glaciers, icebergs, bogs, ponds, lakes, rivers, streams, and groundwater. The basis of almost all freshwater is precipitation from the atmosphere, like mist, rain and snow

The majority of dissolved salt in the ocean is sodium chloride. While other salts like potassium chloride and magnesium chloride contribute to the overall salinity of seawater, sodium chloride is the predominant salt, making up a significant portion of the dissolved salts in the oceans.

World Water Day is an annual UN observance day (always on 22 March) that highlights the importance of freshwater. The day is used to advocate for the sustainable management of freshwater resources. World Water Day is celebrated around the world with a variety of events. These can be educational, theatrical, musical or lobbying in nature. The day can also include campaigns to raise money for water projects. The first World Water Day, designated by the United Nations, was in 1993. Each year many countries celebrate World Water Day.

The largest source of freshwater is ice-caps. Ice-caps, including glaciers and polar ice, store a significant amount of the Earth's freshwater. They contribute to the hydrological cycle by releasing freshwater through melting, which feeds into rivers and ultimately into the oceans. The other options, such as ground water, fresh water lakes, and the atmosphere, represent smaller fractions of the Earth's total freshwater.

A terrarium is like an aquarium, but for plants instead of fish. It is made in just about any glass container. It is planted to look like a miniature garden or forest enclosed in its own little world. For example, you could plant all succulents (including cactus), because they need very little water.