1.
What are the soil layers called?
Correct Answer
C. Soil Horizons
Explanation
Soil horizons are the different layers of soil that are formed over time due to various processes such as weathering and decomposition. Each horizon has distinct characteristics and properties, including color, texture, and organic matter content. These horizons, such as topsoil, subsoil, and bedrock, play a crucial role in determining the fertility and composition of the soil. Therefore, the correct answer is "Soil Horizons."
2.
Which word means to "filter down through the soil horizons"?
Correct Answer
D. Percolate
Explanation
Percolate means to filter down through the soil horizons. It is commonly used to describe the process of water seeping through the layers of soil.
3.
What is the transport of top layers of soil to another place called?
Correct Answer
D. Soil Erosion
Explanation
Soil erosion refers to the process of the top layers of soil being transported from one place to another. This can occur due to various factors such as wind, water, or human activities. It is a natural phenomenon that can have negative effects on the environment, including the loss of fertile soil, increased sedimentation in water bodies, and reduced agricultural productivity.
4.
What is the destruction of forests called?
Correct Answer
D. Deforestation
Explanation
Deforestation refers to the destruction or removal of forests, typically through human activities such as logging, agriculture, or urbanization. It involves the permanent conversion of forested land into non-forested land, leading to the loss of trees, biodiversity, and ecological balance. Deforestation has significant environmental impacts, including habitat destruction, soil erosion, climate change, and the loss of valuable resources.
5.
What word means to degrade naturally?
Correct Answer
A. Biodegrade
Explanation
Biodegrade means to degrade or break down naturally through biological processes. It refers to the ability of a substance or material to be broken down by bacteria, fungi, or other living organisms into simpler compounds, typically carbon dioxide, water, and biomass. This process is important for the environment as it helps to reduce waste and minimize pollution.
6.
What are rocks made from?
Correct Answer
C. Minerals
Explanation
Rocks are made from minerals. Minerals are naturally occurring inorganic substances that have a specific chemical composition and crystal structure. They are the building blocks of rocks and are formed through various geological processes such as cooling and solidification of magma, precipitation from water, or metamorphism. Rocks, on the other hand, are aggregates of minerals or mineraloids. Therefore, minerals are the primary constituent of rocks and provide them with their characteristic properties and appearance.
7.
What molecules in fossil fuels are made from carbon and hydrogen?
Correct Answer
D. Hydrocarbons
Explanation
Hydrocarbons are molecules that are made up of only carbon and hydrogen atoms. Fossil fuels, such as coal, oil, and natural gas, are primarily composed of hydrocarbons. These molecules are formed from the remains of ancient plants and animals that have been subjected to high pressure and temperature over millions of years. Hydrocarbons are highly combustible and release energy when burned, making them a valuable source of energy.
8.
What is water that flows over the ground rather than seeping into it called?
Correct Answer
C. Runoff
Explanation
Runoff refers to water that flows over the ground rather than seeping into it. This occurs when the ground is saturated or unable to absorb any more water, such as during heavy rainfall or snowmelt. Runoff can occur on various surfaces, including roads, sidewalks, and fields, and it eventually makes its way into streams, rivers, lakes, or the ocean. It plays a crucial role in the water cycle by replenishing bodies of water and maintaining the balance of water on Earth.
9.
What is the process that removes salt from sea water?
Correct Answer
C. Desalination
Explanation
Desalination is the process of removing salt from sea water. This process involves various techniques such as reverse osmosis, distillation, and electrodialysis, which effectively separate the salt and other impurities from the water, making it safe for consumption or other purposes. Desalination is commonly used in areas with limited freshwater resources or where there is a high demand for clean water.
10.
What is water treated with to prevent bacteria from growing?
Correct Answer
A. Chlorine
Explanation
Water is treated with chlorine to prevent bacteria from growing. Chlorine is a powerful disinfectant that kills bacteria and other microorganisms in water. It is commonly used in water treatment plants to ensure that the water is safe for consumption. Chlorine effectively destroys harmful bacteria and helps to maintain the quality and safety of the water supply.
11.
What layer in the atmosphere is responsible for filtering out solar radiation?
Correct Answer
C. Ozone Layer
Explanation
The ozone layer is responsible for filtering out solar radiation. Ozone molecules in this layer absorb and scatter the majority of the Sun's ultraviolet (UV) radiation, preventing it from reaching the Earth's surface. This filtering process is crucial for protecting living organisms from the harmful effects of excessive UV radiation, such as skin cancer, cataracts, and damage to marine ecosystems.
12.
What acidic precipitation occurs when sulfur dioxides build up in the clouds?
Correct Answer
B. Acid Rain
Explanation
Acid rain occurs when sulfur dioxides build up in the clouds. These sulfur dioxides are released into the atmosphere through the burning of fossil fuels, such as coal and oil. Once in the atmosphere, they react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid. These acids then fall to the ground as acid rain, which can have harmful effects on the environment, including damage to plants, buildings, and aquatic ecosystems.
13.
In what modern-day country did the dog called the Rhodesian Ridgeback originate?
Correct Answer
A. South Africa
Explanation
The Rhodesian Ridgeback originated in South Africa. This breed of dog was developed by the Boer settlers in the late 19th century. They used various breeds, including the African native dogs, to create a versatile hunting dog that could withstand the harsh African climate. The Rhodesian Ridgeback is known for its distinctive ridge of hair along its back, which grows in the opposite direction from the rest of its coat. It is a strong and agile breed, originally used for tracking and holding down lions until the hunters arrived. Today, the Rhodesian Ridgeback is a popular companion and show dog.
14.
A vine disease caused by a fungus that attacks the green part of the vine is called?
Correct Answer
C. Black Rot
Explanation
Black Rot is a vine disease caused by a fungus that specifically attacks the green parts of the vine. This disease can cause significant damage to the vine, including the leaves, shoots, and fruit. It is characterized by black, necrotic lesions on the affected parts of the plant. The fungus responsible for Black Rot is called Guignardia bidwellii. It spreads through spores and can survive in plant debris, making it important to practice good sanitation and cultural practices to prevent and manage this disease.
15.
What natural disaster is said to be 100 times greater than an atomic bomb?
Correct Answer
D. Volcano Eruption
Explanation
A volcanic eruption is said to be 100 times greater than an atomic bomb because of the immense amount of energy and destruction it can cause. Volcanic eruptions release large amounts of ash, lava, and gases into the atmosphere, which can lead to widespread devastation. The force of a volcanic eruption can cause massive explosions, create pyroclastic flows, and trigger tsunamis. The energy released during a volcanic eruption is far greater than that of an atomic bomb, making it a highly destructive natural disaster.