1.
The main sources of freshwater are:
Correct Answer(s)
A. Rivers
B. Lakes
E. Glaciers
Explanation
Rivers, lakes, and glaciers are the main sources of freshwater. Rivers are bodies of water that flow from higher areas to lower areas, carrying freshwater with them. Lakes are large bodies of water that hold freshwater. Glaciers are massive ice formations that store freshwater in the form of ice. Oceans, on the other hand, contain saltwater and are not a source of freshwater. Tap water, although it comes from various sources, is typically treated to remove impurities and is not considered a natural source of freshwater.
2.
Water that is fit for drinking is called ________ water.
Correct Answer(s)
Potable
Explanation
Potable water refers to water that is safe and suitable for drinking. It is free from harmful contaminants and meets the necessary quality standards. The term "potable" is used to describe water that is suitable for consumption by humans without causing any health risks.
3.
Wise utilization of water is called water utilization.
Correct Answer
B. False
Explanation
The given statement is incorrect. Wise utilization of water is not called water utilization. It is called water conservation or water management. Water utilization refers to the process of using water for various purposes such as drinking, irrigation, industrial use, etc. Water conservation, on the other hand, emphasizes the wise and responsible use of water to minimize waste and ensure its sustainability for future generations.
4.
Which of the following leads to water scarcity?
Correct Answer
D. Increase in population
Explanation
The increase in population can lead to water scarcity because as the population grows, the demand for water increases. This puts pressure on the available water resources, leading to a shortage of water for everyone. With more people needing water for drinking, cooking, sanitation, and other daily activities, the existing water sources may not be able to meet the demand. This can result in water scarcity, where there is not enough water to meet the needs of the growing population.
5.
Human-made resources are classified into ________ and ________.
Correct Answer
Structures
Monuments
Explanation
Human-made resources are classified into structures and monuments. Structures refer to man-made objects or constructions that serve a particular purpose or function, such as buildings, bridges, roads, and dams. These structures are designed and built by humans to meet various needs, such as shelter, transportation, and infrastructure. On the other hand, monuments are human-made objects or structures that hold historical, cultural, or symbolic significance. Monuments are often created to commemorate or honor a person, event, or idea and are considered important landmarks or symbols of a particular place or time.
6.
The process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure is called?
Correct Answer
B. Evaporation
Explanation
Evaporation is the correct answer because it refers to the process of a substance in a liquid state changing to a gaseous state due to an increase in temperature and/or pressure. This process occurs when the molecules of a liquid gain enough energy to escape into the surrounding atmosphere, forming a gas. It is an essential part of the water cycle and plays a crucial role in the Earth's climate system.
7.
Which of the following is biodegradable?
Correct Answer(s)
A. Egg shells
B. Leaves
D. Cotton cloth
Explanation
Egg shells, leaves, and cotton cloth are all biodegradable materials. Biodegradable means that these substances can be broken down naturally by microorganisms such as bacteria or fungi, eventually returning to the environment as organic matter. This process is important for the recycling of nutrients and the sustainability of ecosystems. On the other hand, plastic is not biodegradable and can persist in the environment for hundreds of years, causing pollution and harm to wildlife.
8.
Choose the source of energy which is different from these:
Correct Answer
B. Crude oil
Explanation
Crude oil is the only non-renewable source of energy among the options given. Solar energy is derived from the sun and is a renewable source. Plants and vegetable refuse are biomass sources of energy, which can be replenished through natural processes. However, crude oil is a fossil fuel formed from the remains of ancient plants and animals, and it takes millions of years to form. Once it is extracted and used, it cannot be replaced within a human lifespan, making it a finite and non-renewable source of energy.
9.
Plastic when consumed by animals, leads to damage in the intestines.
Correct Answer
A. True
Explanation
When animals consume plastic, it can cause damage to their intestines. This is because plastic is not digestible and can get stuck in the digestive system, leading to blockages, tears, or other injuries. These injuries can be harmful and even fatal to the animals. Therefore, the statement "Plastic when consumed by animals, leads to damage in the intestines" is true.
10.
Damages caused by coal:
Correct Answer(s)
A. Emission of carbondioxide
D. Flooding in coastal regions
E. Melting of ice bergs
Explanation
The damages caused by coal include the emission of carbon dioxide, which contributes to climate change and global warming. Additionally, coal mining often leads to deforestation, destroying natural habitats and disrupting ecosystems. The burning of coal also releases pollutants that can contribute to air pollution and respiratory problems. Flooding in coastal regions can be caused by the melting of ice bergs, which are a result of rising global temperatures. These damages highlight the negative environmental impacts of coal and the urgent need to transition to cleaner and more sustainable energy sources.
11.
A ________ was sent to coal companies that coal would cause great damage to the earth when it was founded.
Correct Answer(s)
Warning note
Explanation
The given sentence states that a [Blank] was sent to coal companies warning them about the potential damage caused by coal. The term "warning note" perfectly fits in this context as it accurately describes a written message sent to alert someone about a potential danger or harm.
12.
Global warming is:
Correct Answer
C. Increase in temperature of the earth
Explanation
Global warming refers to the long-term increase in the average temperature of the Earth's atmosphere and oceans. It is caused by the accumulation of greenhouse gases, primarily carbon dioxide, in the atmosphere. This increase in temperature has various consequences, including rising sea levels, melting polar ice caps, and extreme weather events. The given answer accurately describes global warming as the increase in temperature of the Earth, distinguishing it from the other options that refer to specific instances or localized effects.
13.
Water is a compound of?
Correct Answer
C. Hydrogen and Oxygen
Explanation
Water is a compound composed of hydrogen and oxygen. The chemical formula for water is H2O, which means it consists of two hydrogen atoms bonded to one oxygen atom. This combination of elements forms a stable molecule with unique properties, such as its ability to dissolve many substances and its role as a universal solvent.
14.
There are plastics that are biodegradable.
Correct Answer
A. True
Explanation
Plastics that are biodegradable are designed to break down naturally over time through the action of microorganisms, such as bacteria and fungi. Unlike traditional plastics, which can persist in the environment for hundreds of years, biodegradable plastics can decompose into natural elements, such as water, carbon dioxide, and biomass. These types of plastics offer a more sustainable alternative as they reduce the accumulation of plastic waste and minimize the environmental impact.
15.
Electricity can be obtained from the following renewable resources.
Correct Answer(s)
A. Solar energy
C. Wind
D. Water
Explanation
The correct answer includes three renewable resources that can be used to obtain electricity. Solar energy refers to the conversion of sunlight into electricity using solar panels. Wind energy involves harnessing the power of wind through wind turbines to generate electricity. Water energy, also known as hydropower, utilizes the force of flowing or falling water to produce electricity. Oxygen, on the other hand, is not a direct source of electricity generation. It is a component of air and is not typically used as a renewable resource for electricity production.