NCERT Class 7 Geography Water

....................... is an artificial enclosure for keeping small houses plants

• Terrarium
• Greenhouse
• Planter
• Flowerpot

Major Sources of freshwater sources are ....................

• rivers, lakes, glaciers, groundwater
• oceans
• deserts
• swamps

........... is the amount of salt in 1000 grams of water

• Salinity
• Ocean water

• Dissolution
• Saline

............... of earth surface covered by water

• 25%

• 95%

• 4/5

• 3/4

Salt which is present in ocean water

• Potassium chloride (KCl)
• Calcium carbonate (CaCO3)
• Magnesium sulfate (MgSO4)
• Sodium chloride (NaCl)

Types of ocean movements

• tsunamis
• floods
• Waves, tides, currents

• whirlpools

Choose the correct one

• Saline water in ocean is 96.3%

• Freshwater is 2.7%

• The process by which water continually changes its forms and circulates between ocean , atmosphere and land is known as water recycle

• River is the most resource for freshwater

Choose the correct one

• March 23 is celebrated as World Water Day

• The stronger the wind blows the bigger the tide becomes

• Earthquake can shift large amount of ocean water and cause waves

• Tsunami means Harbour city in latin word

What is run off ?

• Runoff is the process of water evaporating from the soil.
• Runoff refers to the absorption of water by plants.
• Runoff is the collection of water in underground reservoirs.
• Runoff is the flow of water , that moves across the land and into water bodies.

What are tides ?

• Tides are the periodic changes in sea level caused by the gravitational pull of the moon and sun.
• Tides are changes in sea temperature due to weather patterns.
• Tides are the result of ocean currents moving in circles.
• Tides are caused by underwater volcanic activity.