Question

which human activity has the least impact on natural resources? *
open-pit mining
deforestation
urban sprawl
sustainable fishing practices

what is the term for the boundary between two different air masses? *
isobar
front
isotherm
jet stream

which of the following is not a form of precipitation? *
dew
sleet
hail
snow

Explanation:

First Question:

• Open - pit mining: Involves removing large amounts of earth, which disrupts habitats and uses natural resources, having a significant impact.
• Deforestation: Clears large areas of forests, affecting biodiversity, soil, and water resources, with a major impact.
• Urban sprawl: Expands cities, consuming land, water, and other resources, and disrupting ecosystems.
• Sustainable fishing practices: Are designed to harvest fish in a way that maintains fish populations and the marine ecosystem, so they have the least negative impact on natural resources.

• Isobar: Lines on a weather map connecting points of equal atmospheric pressure, not related to air - mass boundaries.
• Front: The boundary between two different air masses with different properties (temperature, humidity, etc.).
• Isotherm: Lines on a map connecting points of equal temperature, not for air - mass boundaries.
• Jet stream: A fast - flowing, narrow air current in the atmosphere, not a boundary between air masses.

• Sleet: A form of precipitation (frozen raindrops or a mix of rain and snow).
• Hail: Precipitation in the form of balls or irregular lumps of ice.
• Snow: Precipitation in the form of ice crystals or flakes.
• Dew: Forms when moisture in the air condenses on cool surfaces, it is not precipitation (precipitation falls from clouds to the ground, while dew forms on the ground - level surfaces).

Answer:

D. Sustainable fishing practices

Second Question: