Test: Life in the Tropical and the Subtropical Regions - Class 7 MCQ

• The main type of vegetation found in the Amazon basin is the rainforest.
• Rainforests are lush forests with tall trees and a variety of plants.
• They are important because they provide oxygen for us to breathe and are home to many animals like monkeys, birds, and insects.
• It's like a big green blanket covering the area, keeping it cool and full of life.

The Amazon basin is located in northern South America within the tropical region, which means it has a warm climate with lots of rain and sunshine. This area is known for its rich biodiversity and lush rainforests.

• Indigenous groups in the rainforest often use a method called slash and burn agriculture. This means they clear a small part of the forest by burning trees and then use the ashes to help the soil for farming.
• This method has been used for a long time to grow food like plantains, pineapples, sweet potatoes, and cassava.

Indigenous groups in the rainforest use slash and burn agriculture to cultivate crops. This means they clear a part of the forest by burning trees and use the ash to make the soil better for growing plants.

• Human activities like logging, farming, mining, and settlement have caused deforestation in the Amazon rainforest.
• This means that trees are being cut down in large numbers, which damages the forest's ecosystems where plants and animals live.
• It's important to protect forests so that animals have homes to live in and the environment stays healthy for everyone.

In the mountainous and foothill areas of this region, you can find different types of forests. Tropical evergreen forests, deciduous forests, and coniferous trees like pine, cedar, deodar, and fir are found there. So, all of these options are correct!

The Sundarbans in the delta region is known for being the world's largest mangrove forest. Mangrove forests are special because they can grow in both fresh and salty water, making them unique and important for the environment.

• The Ganga-Brahmaputra Plain is densely populated mainly because it has a lot of rivers in the region.
• These rivers provide water for farming and transportation, making it easier for people to live and work there.
• Rivers help in growing crops and allow people to travel from one place to another easily.
• That's why many people choose to live in this area.

The Ganga-Brahmaputra Plain is densely populated because it has very rich and good soil that helps farmers grow a lot of food easily. This makes many people want to live there because they can grow food and have good jobs too.

• The Ganga-Brahmaputra region faces challenges like deforestation and clearing of forests.
• This means cutting down trees and removing forests, which harms the environment.
• Trees are important for clean air and to provide homes for animals.
• We should protect trees and forests to keep our environment healthy and green.

Kolkata is a vibrant city in the Ganga-Brahmaputra Plain, known for its rich historical, cultural, and religious heritage. It is one of the important cities in the region.

• The Sundarbans delta and the people living there are in danger because the sea levels are going up.
• This means that the water from the sea is coming into the land more than before, which can flood the area where farmers and fisherfolk live and work.
• It's important for us to take care of our Earth so that places like the Sundarbans can be safe for everyone.

Global warming is when the Earth heats up (the temperature rises). It happens when greenhouse gases (carbon dioxide, water vapor, nitrous oxide, and methane) trap heat and light from the sun in the Earth’s atmosphere, which increases the temperature.

• The environment in each region affects how people dress. This means the weather and surroundings can decide what type of clothes people wear.
• For example, in hot places, people might wear light and breathable clothes, while in cold places, they might wear warm and cozy clothes to stay comfortable.

The chapter talks about two specific regions: the Amazon basin and the Ganga-Brahmaputra basin. These are areas with different environments and cultures.

The Amazon basin has a hot and humid climate all year round. This means it is usually warm and sticky with lots of rain. So, if you were in the Amazon, you would feel warm and probably a bit sweaty because of the humidity.

In the Amazon rainforest, you can find tall broadleaf hardwood trees. These trees are very big and have wide leaves. They are special because they create a thick canopy that blocks a lot of sunlight from reaching the ground. This is why the lower parts of the forest are dark and moist.

The Amazon rainforest is filled with tall broadleaf trees that make a thick cover at the top. "Broadleaf" means the trees have wide leaves, not narrow ones.

• Indigenous groups in the rainforest clear land for farming by burning trees and using the ash. This helps to make the soil better for planting crops.
• Burning the trees also makes space for them to grow food like plantain, pineapples, sweet potato, and cassava.
• It's like making a clean space in the forest to grow yummy fruits and vegetables.

Indigenous groups in the rainforest live in traditional huts made from natural materials like wood, leaves, and vines. These materials are found in the forest and are used to build their homes.

• Humans doing things like cutting down trees and building roads in the Amazon rainforest are causing harm to the environment.
• This can hurt the animals and plants that live there.
• It's important to protect the rainforest so that it can stay healthy and provide a home for many different species.

A carbon sink is like a big sponge that soaks up carbon dioxide, a gas that can make the Earth warmer. The Amazon rainforest is like a very big sponge that helps keep the Earth's climate in balance by taking in carbon dioxide and giving out oxygen.

• Coniferous forests are the type of forests found in mountainous and foothill areas like Uttarakhand and Arunachal Pradesh.
• These forests are special because they have trees like pine, cedar, deodar, and fir.
• These trees are very important because they provide shelter to many animals and help keep the soil stable with their strong roots.

The Sundarbans in the delta region is known for being the world's largest mangrove forest. Mangrove forests grow in salty water and help protect coastlines from erosion and storms. They are home to various plants and animals adapted to live in brackish water.

Rice is the main crop grown in the plains because it needs a lot of water to grow well.

• When waste from towns and industries is dumped into rivers, it causes pollution.
• This is not good for the environment because pollution can harm plants, animals, and people.
• It's important to keep our rivers clean by not throwing garbage into them so that everything can stay healthy and happy.

Pollution means that harmful substances are released into the environment. In the Ganga-Brahmaputra region, waste from towns and industries is dumped into the rivers, causing pollution that harms the environment.