Class 10 Science Chapter 13 Our Environment
Question: Substances that cannot be broken down by biological processes are called ………. substances.
Answer: Non-biodegradable
Question: In a food chain, plants are called ………. because they produce their own food.
Answer: Producers
Question: The process by which green plants convert sunlight into chemical energy is called ……….
Answer: Photosynthesis
Question: A network of interconnected food chains in an ecosystem is called a ……….
Answer: Food web
Question: The top-level carnivores in a food chain are called ……….
Answer: Apex predators
Question: The removal of an organism from a food chain can disturb the ………. of the ecosystem.
Answer: Balance
Question: The percentage of energy transferred from one trophic level to the next in a food chain is approximately ……….
Answer: 10%
Question: The gradual accumulation of harmful chemicals in organisms through a food chain is called ……….
Answer: Biomagnification
Question: Non-biodegradable substances like plastics can remain in the environment for ……….
Answer: Hundreds of years
Question: Organisms that break down dead organic matter into simpler substances are called ……….
Answer: Decomposers
Question: The maximum energy in a food chain is available at the ………. trophic level.
Answer: Producer
Question: Biodegradable substances include ………. and ……….
Answer: Vegetable peels, paper
Question: Decomposers play an essential role in recycling ………. in the ecosystem.
Answer: Nutrients
Question: Energy flow in an ecosystem is ………., not cyclic.
Answer: Unidirectional
Question: Pesticides like DDT accumulate in the bodies of organisms because they are ………. soluble.
Answer: Fat
Question: Plastic bags are an example of ………. waste.
Answer: Non-biodegradable
Question: The conversion of biodegradable waste into compost is an example of ………. waste management.
Answer: Recycling
Question: Excessive use of fertilizers and pesticides leads to ………. pollution.
Answer: Soil
Question: Deforestation can disrupt the ………. in an ecosystem.
Answer: Food chain
Question: A pyramid showing the number of organisms at each trophic level is called a ……….
Answer: Pyramid of numbers
Question: The layer of the atmosphere that protects living organisms from harmful UV radiation is the ………. layer.
Answer: Ozone
Question: Chlorofluorocarbons (CFCs) are harmful because they cause depletion of the ………. layer.
Answer: Ozone
Question: Human activities such as burning fossil fuels increase the levels of ………. in the atmosphere, leading to global warming.
Answer: Carbon dioxide
Question: The excessive growth of algae in water bodies due to nutrient pollution is called ……….
Answer: Eutrophication
Question: Sustainable development ensures the use of resources without compromising the needs of ………. generations.
Answer: Future
Question: An example of an ecosystem with high biodiversity is a ……….
Answer: Rainforest
Question: Garbage should be segregated into ………. and ………. waste before disposal.
Answer: Biodegradable, non-biodegradable
Question: Using cloth bags instead of plastic bags helps in reducing ………. waste.
Answer: Non-biodegradable
Question: Planting more trees helps in reducing the amount of ………. in the atmosphere.
Answer: Carbon dioxide
Question: Food chains always begin with ……….
Answer: Producers
Question: The elimination of carnivores from an ecosystem can lead to an increase in the population of ……….
Answer: Herbivores
Question: Herbivores obtain energy directly from ……….
Answer: Plants
Question: In a food web, an organism that eats both plants and animals is called an ……….
Answer: Omnivore
Question: Bacteria and fungi are examples of ………. in an ecosystem.
Answer: Decomposers
Question: The trophic level of a lion in a food chain is ……….
Answer: Secondary or tertiary consumer
Question: Reusing materials like glass and metal helps in conserving ……….
Answer: Natural resources
Question: Composting kitchen waste is an example of ………. waste management.
Answer: Biodegradable
Question: Paper recycling reduces the demand for ……….
Answer: Trees
Question: Excessive hunting of herbivores can lead to starvation for ……….
Answer: Carnivores
Question: The non-living components of an ecosystem, like water and soil, are called ………. factors.
Answer: Abiotic
Question: The living components of an ecosystem are called ………. factors.
Answer: Biotic
Question: The decomposition of organic waste by microbes generates a useful gas called ……….
Answer: Methane
Question: A food chain always ends with ……….
Answer: Decomposers
Question: Pollutants that do not break down easily are called ………. pollutants.
Answer: Persistent
Question: The practice of using natural predators to control pests is known as ……….
Answer: Biological control
Question: Excessive use of non-biodegradable materials causes ……….
Answer: Environmental pollution
Question: Proper waste management is essential to reduce the burden on ………. sites.
Answer: Landfill
Question: Reducing the use of plastic is an example of the ………. principle.
Answer: Reduce
Question: ………. is the process of turning waste materials into new products.
Answer: Recycling
Question: Wetlands are important ecosystems that act as ………. for pollutants.
Answer: Filters
Question: The variety of life forms in a particular habitat is referred to as ……….
Answer: Biodiversity
Question: Using renewable energy sources helps in reducing ………. pollution.
Answer: Air
Question: The excessive release of carbon dioxide in the atmosphere causes ……….
Answer: Global warming
Question: The primary source of energy for all ecosystems is ……….
Answer: Sunlight
Question: Humans are at the ………. of the food chain.
Answer: Apex
Question: Excessive use of fossil fuels contributes to the formation of ……….
Answer: Acid rain
Question: Saving water by fixing leaking taps is an example of ………. resource management.
Answer: Sustainable