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    which best explains the effect of reforestation on land? it allows crops to grow in wide steps along slopes. it turns land slowly into desert. it turns habitable land uninhabitable. it restores trees to areas where they once grew.

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    Earth's Resources: Human Impact on Resources Flashcards

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    Earth's Resources: Human Impact on Resources

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    Which activities are ways to reduce the negative impacts humans have on Earth's resources? Select two options.

    eroding river banks

    moving to urban settings

    monitoring air quality

    burning fossil fuels

    building marine refuges

    Click card to see definition πŸ‘†

    monitoring air quality

    building marine refuges

    Click again to see term πŸ‘†

    Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly. This decreases the amount of oxygen in the water, which can cause organisms that depend on it, like fish, to die.

    Which statements describe the impact of the use of fertilizers? Select two options.

    It improves the growth of crops.

    It provides more food for fish.

    It causes erosion and washes away soil.

    It causes the death of crops.

    It harms organisms that live in the oceans.

    Click card to see definition πŸ‘†

    It improves the growth of crops.

    It harms organisms that live in the oceans.

    Click again to see term πŸ‘†

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    Terms in this set (32)

    Which activities are ways to reduce the negative impacts humans have on Earth's resources? Select two options.

    eroding river banks

    moving to urban settings

    monitoring air quality

    burning fossil fuels

    building marine refuges

    monitoring air quality

    building marine refuges

    Commercial fertilizers, which are made by humans, are used to enrich soil for healthier crops. However, erosion may carry the fertilizer chemicals to the oceans. The presence of these chemicals may cause certain kinds of algae to reproduce rapidly. This decreases the amount of oxygen in the water, which can cause organisms that depend on it, like fish, to die.

    Which statements describe the impact of the use of fertilizers? Select two options.

    It improves the growth of crops.

    It provides more food for fish.

    It causes erosion and washes away soil.

    It causes the death of crops.

    It harms organisms that live in the oceans.

    It improves the growth of crops.

    It harms organisms that live in the oceans.

    The best action humans can take to decrease the effect of harmful growth and reproduction of algae is to:

    ban the use of fertilizers.

    decrease crop production.

    control the use of fertilizers.

    use other chemicals.

    control the use of fertilizers.

    Sand dunes protect beaches against erosion and flooding due to storms.

    Which human activity would have the most negative impact on dune grasses and the coast?

    driving vehicles along the beach

    building houses near the beach

    walking on the dunes of the beach

    allowing kids to play on the beach

    building houses near the beach

    Oil is a fossil fuel used to run cars, heat up homes, and produce electricity. Oil can be removed from the bottom of the ocean through drilling. Drilling machines dig deep down into the Earth. When oil is found, pipes carry it to the surface. Sometimes, accidents happen that cause the oil to spill into the oceans. The oil can not only kill marine organisms, but when it reaches the surface of the water, some chemicals evaporate, become part of the atmosphere, and pollute the air.

    Based on the passage, which resources and organisms are affected by oil spills? Select three options.

    air land water birds in the air trees on land organisms in water air water organisms in water

    An artificial reef is a human-made structure that is designed to mimic a natural coral reef. Artificial reefs may be created by sinking structures such as ships and oil rigs. Algae and corals attach to the sunken surfaces, forming the artificial reef. These reefs provide habitats for marine life and can also be beneficial in preventing beach erosion. Artificial reefs provide economic benefits by attracting divers and tourists. Some scientists worry that artificial reefs can damage the natural ecosystem if the sites and materials are not chosen carefully and monitored closely.

    Which statements describe the benefits of artificial reefs? Select three options.

    They can attract marine organisms.

    They can form on top of existing reefs.

    They can prevent beach erosion.

    They can damage the natural ecosystem.

    They can attract tourists to the area.

    They can attract marine organisms.

    They can prevent beach erosion.

    They can attract tourists to the area.

    Which statement explains how smog forms?

    - Volcanoes erupt and release ash into the sky.

    - Strong storms pick up soil and mix it with fog.

    - Sunlight and heat react with gases in the atmosphere.

    - Gases move high into the atmosphere and then fall to Earth in rain.

    Sunlight and heat react with gases in the atmosphere.

    Why is urbanization contributing to pollution?

    - People in urban areas strip the soil of nutrients and make it difficult to grow crops.

    - People in urban areas consume more energy, food, and water.

    - People in urban areas remove minerals and metals from the ground, which increases erosion.

    Source : quizlet.com

    Reforestation

    Reforestation

    From Wikipedia, the free encyclopedia

    Jump to navigation Jump to search

    This article is about natural or intentional restocking of existing or former forests and woodlands. For the establishment of a forest or stand of trees in an area where there was no previous tree cover, see Afforestation. For reforestation and afforestation, see Forestation.

    Tropical tree nursery at Planeta Verde ReforestaciΓ³n S.A.'s plantation in Vichada Department, Colombia

    A 15-year-old reforested plot of land

    A 21-year-old plantation of red pine in Southern Ontario

    Reforestation (occasionally, reafforestation) is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation,[1] but also after clearcutting.

    Reforestation can be used to undo and rectify the effects of deforestation and improve the quality of human life by absorbing pollution and dust from the air, rebuilding natural habitats and ecosystems,reducing global warming via biosequestration of atmospheric carbon dioxide,[2] and harvesting for resources, particularly timber, but also non-timber forest products. Since the beginning of the 21st century, significant attention has been given to reforestation as a technique for reducing climate change as one of the best methods to do it.[3][4] To this end, the international community has agreed on Sustainable Development Goal 15, which promotes implementation of sustainable management of all types of forests, stop deforestation, restore degraded forests and increase afforestation and reforestation.[5]

    Though net loss of forest area has decreased substantially since 1990, the world is unlikely to achieve the target set forth in the United Nations Strategic Plan for Forests[6] to increase forest area by 3 percent by 2030. While deforestation is taking place in some areas, new forests are being established through natural expansion or deliberate efforts in others. As a result, the net loss of forest area is less than the rate of deforestation and it too is decreasing: from 7.8 million hectares per year in the 1990s to 4.7 million hectares per year during 2010–2020. In absolute terms, the global forest area decreased by 178 million hectares between 1990 and 2020, which is an area about the size of Libya.[7]

    Contents

    1 Management 2 For harvesting

    3 For climate change mitigation

    4 Methods

    4.1 Using existing trees and roots

    4.2 Financial incentives

    5 Implementation 5.1 Global

    5.2 Sub-Saharan Africa

    5.3 Costa Rica 5.4 Canada 5.5 China 5.6 Germany 5.7 India 5.8 Ireland 5.9 Israel 5.10 Japan 5.11 Lebanon 5.12 Pakistan 5.13 Philippines 5.14 Turkey 5.15 United States 5.16 Organizations 6 Related concepts 7 Criticism

    7.1 Competition with other land uses

    7.2 Environmental risks

    7.3 Effects on biodiversity

    7.4 Carbon stocks 8 See also 9 References 10 Sources 11 Further reading 12 External links

    Management[edit]

    A debated issue in managed reforestation is whether or not the succeeding forest will have the same biodiversity as the original forest. If the forest is replaced with only one species of tree and all other vegetation is prevented from growing back, a monoculture forest similar to agricultural crops would be the result. However, most reforestation involves the planting of different selections of seedlings taken from the area, often of multiple species.[8] Another important factor is the natural regeneration of a wide variety of plant and animal species that can occur on a clear cut. In some areas the suppression of forest fires for hundreds of years has resulted in large single aged and single species forest stands. The logging of small clear cuts and/or prescribed burning actually increases the biodiversity in these areas by creating a greater variety of tree stand ages and species.

    For harvesting[edit]

    See also: Harvesting

    Reforestation is not only used for recovery of accidentally destroyed forests. In some countries, such as Finland, many of the forests are by the wood products and pulp and paper industry. In such an arrangement, like other crops, trees are planted to replace those that have been cut. The Finnish Forest Act from 1996 obliges the forest to be replanted after felling.[9] In such circumstances, the industry can cut the trees in a way to allow easier reforestation. The wood products industry systematically replaces many of the trees it cuts, employing large numbers of summer workers for tree planting work. For example, in 2010, Weyerhaeuser reported planting 50 million seedlings.[10] However replanting an old-growth forest with a plantation is not replacing the old with the same characteristics in the new.

    Source : en.wikipedia.org

    Energy Unit Test Reivew

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    QUIZ

    Energy Unit Test Reivew

    Energy Unit Test Reivew 62%

    28 8th Science Emily Warren 1 year

    25 Qs

    1. Multiple-choice 30 seconds Q.

    Which of the following is an example of thermal energy?

    answer choices

    Energy is stored in the bonds of an atom

    Energy from the sun is transferred via electromagnetic waves

    Someone touches a hot mug of cocoa, energy is transferred from the surface of the mug to her hand. What kind of energy is this?

    The energy stored in the chemical bonds between atoms

    2. Multiple-choice 30 seconds Q.

    Why is urbanization contributing to pollution?

    answer choices

    People in urban areas log forests and mine, which causes climate change

    People in urban areas strip the soil of nutrients and make it difficult to grow crops

    People in urban areas consume more energy, food, and water

    People in urban areas remove minerals and metals from the ground, which increases erosion

    3. Multiple-choice 30 seconds Q.

    Which is occurring when work is being done?

    answer choices

    Energy is being reverted

    Energy is being decreased

    Energy is being increased

    Energy is being transferred

    4. Multiple-choice 30 seconds Q.

    Which two terms are affected by velocity and height respectively?

    answer choices

    Nuclear and potential energy

    Radiant and chemical energy

    Kinetic and potential energy

    Electrical and thermal energy

    5. Multiple-choice 30 seconds Q.

    If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

    answer choices

    Total energy increases

    Stored energy decreases

    Energy of motion decreases

    Total energy decreases

    6. Multiple-choice 30 seconds Q.

    Which best explains the effect of reforestation on land?

    answer choices

    It allows crops to grow in wide steps along slopes

    It turns land slowly into desert

    It turns habitable land uninhabitable

    It restores trees to areas where they once grew

    7. Multiple-choice 1 minute Q.

    The table shows information about four students who are running around a track.

    Which statement is supported by the information in the chart?

    answer choices

    Hannah has more kinetic energy than Sam

    Larry has less kinetic energy than Hannah

    Monique has more kinetic energy than Larry

    Sam has less kinetic energy than Monique

    8. Multiple-choice 30 seconds Q.

    Tom is wanting to find the potential energy of a ball. He already knows the height the ball reaches, what other information does he need?

    answer choices

    The volume and mass of the ball

    The volume and shape of the ball

    Acceleration due to gravity and the mass of the ball

    Acceleration due to gravity and the shape of the ball

    9. Multiple-choice 30 seconds Q.

    Which two types of potential energies would be types of mechanical energies?

    answer choices

    Electrical and kinetic

    Nuclear and Chemical

    Radiant and Thermal

    Elastic and gravitational

    10. Multiple-choice 30 seconds Q.

    What forms when sunlight and heat react with gases in the atmosphere

    answer choices Acid Rain Desertification Smog Urbanization 11. Multiple-choice 30 seconds Q.

    Joules is a measure of:

    answer choices Force Speed Energy Acceleration 12. Multiple-choice 30 seconds Q.

    Which BEST describes work?

    answer choices

    When a roller coaster goes down a hill, the energy changes from potential to kinetic

    A person standing on top of hill having all potential energy

    An ball has mass

    A book is a certain height off the ground

    13. Multiple-choice 30 seconds Q.

    What is one way dams positively affect natural resources?

    answer choices

    By planting trees where they once existed

    By renewing ecosystems that were once destroyed

    By creating reservoirs, providing water for irrigation, and preventing flooding

    By removing toxins from the air

    14. Multiple-choice 30 seconds Q.

    Which of the following will need to consider the expensive startup costs associated with building machines that harvest energy from clean sources?

    answer choices

    Reducing air pollution

    Regulating deforestation

    Introducing new farming methods

    Protecting ocean reefs

    15. Multiple-choice 30 seconds Q.

    What is mechanical energy?

    answer choices

    The rate at which work is done

    The energy stored in the bonds of atoms

    The energy of an object because of its potential and kinetic energies

    The energy of an object due to its height above a surface

    16. Multiple-choice 1 minute Q.

    A car is moving at 4m/s and has a mass of 200kg. What is the kinetic energy of the car? Use the formula:

    KE=\frac{1}{2}\left(m\right)\times V^2

    KE= 2 1 ​ (m)Γ—V 2 answer choices 800 J 1600 J 400 J 80,000J 17. Multiple-choice 30 seconds Q.

    A roller coaster is going down a hill. If someone were to measure the energy and work being done by the roller coaster by going down the hill which statement would best describe the measurements?

    Source : quizizz.com

    Do you want to see answer or more ?
    James 11 month ago
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