If you are a student of class 7th and searching for Model Activity Task Geography part 5 then we are here to help you. In this article, we have prepared all questions and answers for Model Activity Task Class 7 Geography Part 5.
Model Activity Task Class 7 Geography Part 5
All answers are given below one by one
Answer the following questions
Q No: 1 What is precipitation?
Answer: Precipitation refers to the process by which water in the atmosphere falls back to the Earth’s surface. It occurs when the tiny water droplets or ice crystals in clouds combine and become too heavy to stay in the air. Examples of precipitation include rain, snow, sleet, and hail.
Q No: 2 What is the water cycle?
Answer: The water cycle, also known as the hydrological cycle, is the continuous movement and exchange of water between the Earth’s surface, atmosphere, and underground. It is a natural process that involves several steps. First, the sun’s heat causes water from oceans, lakes, and rivers to evaporate and form water vapor in the atmosphere. This vapor then condenses to form clouds through a process called condensation. When the clouds become saturated, they release moisture in the form of precipitation, such as rain or snow.
Q No: 3 What are the factors affecting the height of the waves?
Answer: Several factors can affect the height of waves. The primary factors include wind speed, wind duration, and the fetch, which refers to the distance over which the wind blows. Stronger winds and longer durations can generate larger waves. The fetch, or the distance the wind travels over the water surface, also plays a role, as longer fetches allow waves to build up more energy and height. Additionally, factors like water depth, ocean currents, and local topography can influence wave height in specific areas.
Q No: 4 Which factors affect the movement of ocean water?
Answer: The factors that affect the movement of ocean water include wind, temperature and density, Earth’s rotation, oceanic topography, and salinity.
Q No: 5 What are tides and how are they caused?
Answer: Tides are the regular rising and falling of the Earth’s ocean surface caused by the gravitational pull of the Moon and, to a lesser extent, the Sun. The gravitational forces from these celestial bodies create a tidal bulge on the side of the Earth facing the Moon and on the opposite side. As the Earth rotates, different parts of the planet experience the bulges, resulting in high tide when the water level is elevated, and low tide when it is lower.
Q No: 6 What are ocean currents?
Answer: Ocean currents refer to the continuous flow of water within the Earth’s oceans. These currents are driven by various factors, including wind patterns, temperature differences, salinity variations, and the rotation of the Earth. Ocean currents can be categorized into two main types: surface currents and deep currents.
Give Reasons to the following
Q No: 1 Ocean water is salty.
Reason: Ocean water is salty because of the presence of dissolved salts and minerals. When water from rivers and streams flows into the ocean, it carries along small amounts of minerals and salts. Over time, these minerals accumulate and become dissolved in the ocean water, resulting in its salty nature. Additionally, volcanic activity, weathering of rocks, and underwater hydrothermal vents contribute to the mineral content and salinity of the ocean water.
Q No: 2 The quality of water is deterioting.
Reason: Water quality is deteriorating due to pollution from various sources, including industrial and agricultural activities. These activities release harmful chemicals and toxins into water bodies, contaminating them and reducing their quality. Additionally, factors such as population growth, urbanization, deforestation, climate change, and mismanagement of water resources contribute to the deterioration of water quality.
Tick the correct answer
(i) The process by which water continually changes its form and circulates
between oceans, atmosphere and land
(a) Water cycle (b) Tides (c) Ocean currents
Answer: (a) Water Cycle
(ii) Generally the warm ocean currents originate near
(a) Poles (b) Equator (c) None of these
(iii) The rhythmic rise and fall of ocean water twice in a day is called
(a) Tide (b) Ocean current (c) Wavew
Match the following
(i)Caspian Sea – (a) Largest lake
(ii) Tide – (b) Periodic rise and fall of water
(iii) Tsunami – (c) Strong seismic waves
(iv) Ocean currents – (d) Streams of water moving along definite paths
(v) Water cycle – (e) Continuous process of water changing its form and circulating between oceans, atmosphere, and land
(a) The snake charmer’s bustee, stables where horses are housed, and the piles of wood, all caught fire accidentally. (Hint: Another name for River Brahmputra) – Dhansiri
(b) The conference manager put pad, material for reading and a pencil for each participant. (Hint: A distributary on the Ganga-Brahmputra delta) – Damodar
(c) Either jealousy or anger cause a person’s fall (Hint: Name of a juicy fruit!) – Ravi
(d) Bhavani germinated the seeds in a pot (Hint: Look for her in West Africa) – Niger
(e) “I am a zonal champion now” declared the excited athlete. (Hint: The river that has the biggest basin in the world) – Amazon
(f) The tiffin box rolled down and all the food fell in dusty potholes. (Hint: Rises in India and journeys through Pakistan) – Indus
(g) Malini leaned against the pole when she felt that she was going to faint. (Hint: Her delta in Egypt is famous) – Nile
(h) Samantha mesmerized everybody with her magic tricks. (Hint: London is situated on her estuary) – Thames
(i) “In this neighborhood, please don’t yell! Owners of these houses like to have peace”. Warned my father when we moved into our new flat. (Hint: color!) – Yellow
(j) ‘Write the following words, Marc!’ “On”, “go”, “in”…….. said the teacher to the little boy in KG Class. (Hint: Rhymes with ‘bongo’) – Congo
The above answers are prepared by our expert team and teacher to class 7th students. Model activity task class 7 Geography part 5 are important in order to get the high score in Geography subject.