Test: The Four Domains and Major Landforms - Grade 4 MCQ

The Arctic Ocean is the smallest of the world's oceans, located around the North Pole and characterized by its ice-covered surface throughout the year.

The hydrosphere encompasses all the water on Earth, including rivers, lakes, seas, and oceans. It plays a crucial role in supporting life, as water is vital for all organisms.

A plateau is commonly called "table land" due to its flat top and elevated position, making it distinct from other landforms such as mountains and valleys.

Rivers are crucial components of the hydrosphere, providing freshwater that supports not only aquatic life but also land animals and humans through drinking water and irrigation.

The lithosphere is the hard, outer part of the Earth that consists of rocks, minerals, and soil. This layer provides the land surface we inhabit and is essential for agriculture, construction, and natural resources.

The biosphere encompasses all living organisms and their interactions with the lithosphere, hydrosphere, and atmosphere, creating an environment that sustains life on Earth.

The source of a river is its starting point, often located in highlands or mountainous areas where precipitation collects and flows downward, forming a river.

Deserts are defined by their extremely low rainfall and minimal vegetation. They can exhibit significant temperature extremes, often being very hot during the day and cold at night.

A mountain is defined as a high piece of land with steep sides and a pointed top, often referred to as a peak. Mountains can influence local climates and ecosystems.

A plateau is a high piece of land with a flat top, often referred to as "table land." Its elevated position can provide unique ecological and climatic conditions.

A glacier is not classified as a major landform like mountains, valleys, or plateaus. Instead, glaciers are large masses of ice that can shape landforms through erosion but are not themselves categorized as landforms.

Oxygen is the essential gas in the atmosphere that humans and many other organisms rely on for respiration. It constitutes about 21% of the Earth's atmosphere.

The atmosphere acts as a protective layer of gases that traps heat from the sun, keeping the Earth warm enough to support life. It also plays a critical role in weather and climate.

Asia is the largest continent, covering about one-third of the Earth's total land area. It includes diverse cultures, languages, and geography, making it a unique and significant region.

A lake is a large area of water surrounded by land, and it can contain either fresh or salty water, depending on its location and source of water.

A valley is a low area situated between higher landforms like hills or mountains, often characterized by the presence of rivers or streams that flow through it.

The atmosphere contains the ozone layer, which absorbs and protects the Earth from harmful ultraviolet (UV) radiation from the sun, making it essential for life.

Australia is known as an island continent because it is completely surrounded by water, distinguishing it from other continents that are connected to landmasses.

Oceans are indeed large and deep bodies of saltwater, and they are larger than seas. They play a significant role in regulating the Earth's climate and supporting marine life.

Plains are characterized by flat, low land that often has fertile soil, making them ideal for agriculture and human settlement due to ease of building infrastructure.