Unit Test - Waste and Our World

Which of the following is an example of organic waste?

• Metal

• Plastic

• Food scraps

• Glass

Answer explanation

Food scraps are considered organic waste because they are biodegradable materials that come from living organisms. In contrast, metal, plastic, and glass are inorganic materials that do not decompose naturally.

Which type of waste is the most biodegradable?

• Liquid Waste

• Organic Waste

• Recyclable Waste

• Hazardous Waste

Answer explanation

Organic waste is the most biodegradable type of waste as it consists of natural materials like food scraps and yard waste, which decompose easily through microbial activity, unlike liquid, recyclable, or hazardous waste.

Which of the following living things are decomposers?

• Worms

• Mice

• Trees

• Birds

Answer explanation

Worms are decomposers as they break down organic matter, returning nutrients to the soil. Mice, trees, and birds do not primarily perform this role in the ecosystem.

Which of the following is an example of flammable hazardous waste?

• Gasoline

• Batteries

• Vinegar

• Metals

Answer explanation

Gasoline is a flammable liquid, making it a clear example of flammable hazardous waste. In contrast, batteries, vinegar, and metals do not fall under this category.

An apple core is an example of which type of waste?

• Hazardous waste

• Recyclable Waste

• Liquid Waste

• Organic Waste

Answer explanation

An apple core is considered organic waste because it is biodegradable and comes from a natural source. Unlike hazardous or liquid waste, organic waste can decompose and be composted, making it environmentally friendly.

Why is human waste usually worse than plant and animal waste?

Answer explanation

Human waste typically contains higher levels of pathogens and harmful bacteria compared to plant and animal waste, making it more hazardous to health and the environment.

Why is it important for us to understand how packaging affects our environment?

Answer explanation

Understanding how packaging affects our environment is crucial for reducing waste, conserving resources, and minimizing pollution. It helps us make informed choices that promote sustainability and protect ecosystems.

Which materials should not be thrown in the garbage and recycled instead?

Answer explanation

Materials like plastics, glass, metals, and paper should be recycled instead of thrown in the garbage. Recycling these items helps reduce waste and conserves resources, making it essential for environmental sustainability.

Why is it important for us to decrease the amount of waste we produce?

Answer explanation

Decreasing waste is crucial to protect the environment, conserve resources, and reduce pollution. It helps mitigate climate change and promotes sustainability, ensuring a healthier planet for future generations.