CLASS 3 SCIENCE: OUR ENVIRONMENT

What is the term for a living thing?

What are bacteria, fungi, and algae examples of?

What defines a population?

What is the size of a population?

What is formed when many organisms live together in the same habitat?

What is the natural place where a group of organisms live called?

Which of the following is an example of a habitat?

What do all the populations living in a habitat depend on one another for?

What does a food chain describe?

What do all food chains begin with?

What is the environment of an organism made up of?

What do plants need to make food?

Why is soil important for plant growth?

What are harmful substances released into the air, water, and land called?

Which option is a way to control pollution?

Why is the concept of a 'community' broader than that of a 'population'?

In what way does the interdependence between plants and animals demonstrate a cycle within an environment?

How does the removal of a keystone species, such as a top predator, impact a food chain?

Imagine a scenario where a new housing development is built near a forest. What might be a direct consequence on the forest habitat?

If a farmer excessively uses fertilizers on their crops, what could be a potential downstream effect on a nearby aquatic habitat?

How might a drought in an area primarily affect the interactions within a community?

How does planting trees help in controlling air pollution?

Consider a scenario where a factory releases chemical waste into a local river. Which of the following is the most likely consequence for organisms in that river?

How does using public transportation over personal vehicles help control pollution?

In a balanced ecosystem, what role do decomposers (like bacteria and fungi) play?

What distinguishes a micro-organism from other organisms?

What is the effect of pollutants released into the air?

How can humans reduce packaging waste to control pollution?

What is a primary reason that soil is crucial for many land-based plants?

A population of deer lives in a forest. If a large number of trees are cut down, what is the most likely immediate effect on the deer population?

Plants, animals, and human beings are called organisms.

A population is a group of different kinds of organisms living together.

The number of organisms in a population is called the size of the civilization.

A community is formed when many different populations share a habitat.

A habitat provides living things with only food and water to survive

Organisms in a habitat are independent and don't rely on each other.

All food chains begin with plants.

The environment of an organism includes only living organisms.

Plants do not need carbon dioxide.

Pollution occurs when harmless substances are released into the environment.

A community consists of multiple populations sharing the same habitat.

Populations in a habitat are independent of each other for survival.

A food chain illustrates the transfer of nitrogen from one organism to another.

Microorganisms exclude bacteria, fungi and algae.

The environment of an organism includes only non-living factors like air and water.

The size of a population refers to the geographic area it occupies.

The arctic region is a typical habitat for earthworms.

Plants depend on animals for oxygen during photosynthesis.

Reusing old items can help exacerbate pollution.

Smoke from cigarettes contains substances harmful only to smokers.

Plants, animals and human beings are also called ______.

A ______ is a group of organisms of the same kind that live together at the same time in a particular place.

Many organisms that live together in the same habitat form a ______.

The place where a group of organisms live is called a ______.

All the populations living in a habitat ______ on one another to survive, and are interdependent.

A ______ chain shows how each living thing gets its food.

All food chains begin with ______.

The environment of an organism includes all living organisms and air, water, and land ( ______ ).

Our environment becomes ______ when harmful substances are released into the air, the water, and the land.

To control pollution each of us should plant as many ______ and other plants as possible in our gardens, parks and schools.

A(n) ______ is defined as any living thing, whether it's a massive elephant or a microscopic bacterium.

A ______ is a group of organisms of the same species living together in a particular place, with its size determined by the number of individuals.

A ______ is formed when various populations of different species share the same environment, indicating a complex web of interactions.

The natural environment where a group of organisms lives, providing essential elements like air, water, food, shelter, and protection, is called a ______.

[Blank] among organisms occurs because all populations in a habitat rely on each other for survival.

A ______ illustrates how energy and nutrients are transferred from one organism to another, starting with plants.

The ______ consists of all the biotic and abiotic factors surrounding an organism, which collectively influence its survival

[Blank], a mixture of gases with water droplets and dust, is essential for the survival of both plants and animals.

[Blank] is vital for organisms because plants use it to make food, and animals need it to quench their thirst.

When harmful substances are released into the air, water, and land, our environment becomes ______.

What is a group of organisms of the same kind living together in the same place called?

Name one thing that all living things need to survive.

What is the place where a group of organisms lives called?

What do we call harmful substances released into the environment that cause pollution?

What is the mixture of gases surrounding the Earth called?

What process do plants use to make food?

Give an example of a micro-organism.

What do food chains always begin with?

What do plants and animals need to breathe?

What is it called when populations in a habitat depend on each other to survive?

Explain how the removal of a keystone species from a community can drastically alter the habitat and affect the interdependence of the remaining organisms.

Describe the potential long-term consequences of introducing a non-native species into an environment with a stable, interconnected food web.

Explain how deforestation contributes to both air and soil pollution, detailing the specific mechanisms involved.

Discuss the complex relationship between human activities and the increasing levels of pollutants in different ecosystems, focusing on specific examples.

Analyze how climate change can exacerbate the effects of existing environmental pollutants on vulnerable ecosystems.

Describe the role of decomposers in an ecosystem and explain what would happen if decomposers disappeared.

Explain how the concept of biomagnification impacts the organisms at the top of a food chain.

Explain how the introduction of a new predator can affect the population of other organisms in a habitat. Provide an example.

Contrast the impact of biodegradable and non-biodegradable pollutants on ecosystems and propose solutions for managing each type of pollution.

Describe how a symbiotic relationship can affect how species responds to changes in their environment, like pollution or climate change.

Explain how the removal of a keystone species, such as a top predator, can drastically alter an ecosystem's structure and function, providing a specific example.

Describe the process of biomagnification and explain why top predators are most vulnerable to the effects of persistent pollutants such as mercury or DDT?

How does habitat fragmentation impact gene flow within a population, and what are the potential consequences for the long-term survival of the species?

Explain the difference between primary and secondary ecological succession, highlighting the conditions necessary for each to occur.

Describe how the concept of carrying capacity relates to population growth, and what factors can cause a population to exceed its carrying capacity?

Explain how the introduction of an invasive species can disrupt established food webs and potentially lead to the decline or extinction of native species.

Describe the role of decomposers in an ecosystem, and explain why they are essential for nutrient cycling and maintaining soil fertility?

Explain how climate change is affecting species distributions and community composition, providing examples of observed or predicted changes.

How does deforestation contribute to climate change and biodiversity loss, and what are some potential strategies for mitigating these impacts?

Differentiate between density-dependent and density-independent factors that regulate population size, providing examples of each and explaining how their effects vary with population density.