Geography. Class 7 True Or False

The statement correctly defines the barter system as a trade where goods are exchanged without the use of money. In a barter system, individuals or parties directly exchange goods or services for other goods or services, eliminating the need for currency. Therefore, the answer "True" accurately reflects the definition provided.

The gravitational force of the earth is responsible for holding the atmosphere around it. This force attracts the gases in the atmosphere towards the earth's surface, preventing them from escaping into space. Without the gravitational force, the gases in the atmosphere would disperse into space, leading to the loss of the atmosphere and making life on earth unsustainable. Therefore, it is true that the gravitational force of the earth holds the atmosphere around it.

The statement "No life can exist in the biosphere" is incorrect because the biosphere is the zone on Earth where life exists. It includes all ecosystems and living organisms, such as plants, animals, and microorganisms. Therefore, life does exist in the biosphere, making the correct answer "False".

Landforms are not found only over continents. Landforms can also be found in other areas such as underwater, on islands, and even on the ocean floor. Landforms are natural features that are shaped by various geological processes, including erosion, deposition, and tectonic activity. These processes can occur in both terrestrial and aquatic environments, resulting in the formation of landforms such as mountains, valleys, canyons, plateaus, and ocean trenches. Therefore, the statement that landforms are found only over continents is false.

The given statement is false. The abiotic environment refers to the non-living components of an ecosystem, such as temperature, sunlight, water, soil, and air. It does not include living organisms, which are part of the biotic environment.