Class 5 Science Living things and their environment – Notes Question Answers
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1.) What is the term for all the living and non-living things in a particular area?
a) Habitat
b) Ecosystem
c) Community
d) Population
Answer: b) Ecosystem
2.) The transfer of energy from organisms to another in a series is called:
a) Food web
b) Food chain
c) Energy cycle
d) Trophic level
Answer: b) Food chain
3.) What is the primary source of energy in most ecosystems?
a) Wind
b) Sunlight
c) Geothermal heat
d) Fossil fuels
Answer: b) Sunlight
4.) Which of the following is a major cause of disappearing species all over the world?
a) Overpopulation
b) Habitat destruction
c) Natural selection
d) Increased genetic diversity
Answer: b) Habitat destruction
5.) The process of planting new trees to replace those that have been cut down for urban use in a forest is?
a) Reforestation
b) Deforestation
c) Forestation
d) Desertification
Answer: a) Reforestation
6.) Which of the following is a decomposer?
a) Rabbit
b) Owl
c) Earthworm
d) Grasshopper
Answer: c) Earthworm
7.) Which is not a part of a food chain?
a) Producer
b) Consumer
c) Decomposer
d) Precipitation
Answer: d) Precipitation
8.) Which human activity is a major cause of habitat destruction?
a) Recycling
b) Planting trees
c) Deforestation
d) Nature conservation
Answer: c) Deforestation
9.) Which animal is an example of herbivore animal?
a) Lion
b) Owl
c) Deer
d) Eagle
Answer: c) Deer
10.) What is a primary consumer in a food chain?
a) An organism that eats other consumers
b) An organism that eats producers
c) An organism that eats decomposers
d) An organism that doesn’t eat
Answer: b) An organism that eats producers
11.) Which of the following is a predator?
a) Grass
b) Rabbit
c) Sunflower
d) Wolf
Answer: d) Wolf
12.) In a food chain, which organism occupies the third trophic level?
a) Herbivores
b) Secondary consumer
c) Producer
d) Carnivores
Answer: d) Carnivores
13.) Why is it important to protect the habitat of an endangered species?
a) To increase their population
b) To keep them as pets
c) To maintain biodiversity
d) To control their reproduction
Answer: c) To maintain biodiversity
14.) A network of interconnected food chains in an ecosystem is known as?
a) Food group
b) Food chain
c) Food pyramid
d) Food web
Answer: d) Food web
15.) What is conservation of nature means?
a) Using resources without limit
b) Protecting and preserving natural resources
c) Wasting resources intentionally
d) Harming the environment
Answer: b) Protecting and preserving natural resources
State True/False in the following sentences (5*1=5)
1.) A food chain always begins with a producer.
Answer: True
2.) Endangered species are animals or plants that are abundant and not at risk of extinction.
Answer: False
3.) Biodiversity is the variety of lives on Earth, including different types of plants and animal.
Answer: True
4.) Overfishing can lead to the decline of marine species and disrupt the ocean food chains.
Answer: True
5.) Climate change has no impact on the habitats and survival of plant and animal species.
Answer: False
Short answer questions (10*1=10)
1.) What is a food chain?
Answer: A food chain is the systemic transformation of energy and nutrients from one organism to another in a series sequence.
2.) Give an example of a producer in a food chain.
Answer: Grass is an example of a producer in a food chain.
3.) What is a carnivore?
Answer: A carnivore is an animal that primarily eats other animals for energy and nutrients. Example: lions, tigers, sharks etc
4.) What is a decomposer in an ecosystem?
Answer: Decomposers are organisms that break down dead plants and animals into nutrients and return them back to environment.
5.) What are some reasons for species disappearing from an ecosystem?
Answer: Reasons behind disappearing species are: habitat destruction, global warming, pollution, climate change, overhunting, fishing etc.
6.) How can humans help in protecting forest?
Answer: We can help in protecting forests by reducing paper and wood consumption, using less tree oils, using more recycled products etc.
7.) What is an endangered species, and how can we help to protect them?
Answer: Endangered species are the organisms that are at risk of extinction. We can help by supporting conservation methods, reducing hunting, not using products made from these species, etc.
8.) What is a food web?
Answer: A food web is a network of interconnected food chains in an ecosystem.
9.) Give an example of a disappearing species and explain why it’s endangered.
Answer: The royal Bengal Tiger is endangered due to habitat loss and climate change and human hunting activities.
10.) Explain how planting native plants can help in protecting habitats.
Answer: Native plants provide food and shelter for local wildlife which further helps in protecting habitats.
Descriptive answer questions (5*2=10)
1.) What is deforestation, and why is it harmful for the environment?
Answer: Deforestation is the process of decreasing forests for farming or urban use. It’s harmful because it leads to habitat loss, reduces biodiversity, and contributes to climate change.
2.) How climate change affects biodiversity in ecosystems?
Answer: Climate change can alter temperature and precipitation patterns, can cause draught, global warming which leads to extinction of species within ecosystems.
3.) Differentiate between a food chain and a food web.
Food chain Food web
Food chain is a linear path of transformation of energy. Food web is a complex network of flowing of energy.
It has maximum four-five trophic levels of different species. It includes numerous trophic level.
Answ
4.) What is shifting cultivation?
Answer: Shifting cultivation is an agricultural process of growing crops in a land temporarily and abandoning the land in fallow for reverting its natural vegetation and shifting the cultivation practice to another land and this process get repeated.
5.) Explain two reasons of how human population affects habitat?
Answer: As human population increases food demand increases as a result there is habitat destruction, deforestation, extraction of natural resources everything increases and affects habitats of so many species.
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