حل ورقة عمل Effects of the Biosphere في العلوم باللغة الإنجليزية للصف الخامس (2)

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Effects of the Biosphere

الأسئلة الموضوعية MCQ -

Q 1: what fraction of wildfires in the United States are started by humans?

A. Four out of every five B. Three out of every five C. Two out of every five D. One out of every five

Q 2: Which term refers to the removal of large areas of trees, which can force animals to leave their habitats?

A. Extinction B. Conservation C. Deforestation D. Sustainability

Q 3: How do invasive species primarily affect an environment? A. They provide balance to all of Earth's systems in that habitat. B. They always help native plants grow faster. C. They have a serious impact by potentially bringing disease or affecting the soil. D. They are only harmful if they are larger than the native animals.

Q 4: Why are scientific models, such as the one used in the overfishing

simulation, useful for studying Earth's systems?

A. They are always easier to read than written reports.

B. They allow us to observe potential harmful effects without causing actual harm to living things.

C. They can predict the future with 100% accuracy.

D. They eliminate the need for field data collection.

Q 5: Which of the following is considered a renewable resource? A. Coal B. Oil C. Sunlight D. Natural Gas

Q 6: An animal species that is at risk of dying out completely is classified as:

A. Extinct B. Endangered C. Native D. Invasive

Q 7: Which of the following human actions is a way to help protect Earth's natural

resources?

A. Disposing of trash by burning it in open fields.

B. Planting trees that are native to the area.

C. Using chemical fertilizers for all plant beds.

D. Driving a car for all short-distance trips.

Q 8: how do plants interact with the atmosphere?

A. They take in carbon dioxide and release oxygen.

B. They consume oxygen and release carbon dioxide.

C. They have no effect on the atmosphere.

D. They trap nitrogen in the soil.

Q 9: What is a primary reason a population of animals might increase or decrease

over time?

A. Changes in their food, water, or shelter.

B. Changes in the color of the local rocks.

C. Changes in the amount of gravity in the area.

D. Changes in the name given to the species by humans.

Q 10: which animal is currently extinct? A. Mountain gorilla B. Golden toad C. Leatherback sea turtle D. Whitefin dolphin

Q 11: Define "natural resource" and distinguish between renewable and nonrenewable resources.

Answer: A natural resource is a material found in nature that humans use. Renewable resources (like water or sunlight) can be replaced in nature, while nonrenewable resources are found in limited amounts and will eventually run out.

Q 12: Explain one negative environmental impact of using chemical fertilizers on lawns and flower beds.

Answer: When it rains, chemicals from fertilizers can be carried by runoff into nearby water sources, potentially polluting them and harming aquatic ecosystems.

Q 13: Why is deforestation considered a threat to biodiversity?

Answer: Deforestation destroys large areas of habitat, forcing animals to move. If they cannot find new habitats with the resources they need to survive, they may become endangered or extinct.

Q 14: How can planting native plants help protect an environment?

Answer: Native plants provide balance to the local ecosystem. They can support local wildlife without introducing diseases or negatively altering the soil, unlike some non-native or invasive species.

Q 15: How does the biosphere (living things) interact with the geosphere (land)?

Answer: Animals use the land to create habitats, while plants require space in the ground (soil) to grow. Additionally, humans use the land to build roads and structures.