Earth and Human Activity

Water conservation means using water wisely so we don’t waste it or run out. Freshwater is limited, and agriculture uses the most, often inefficiently

Groundwater is the water located beneath Earth's surface in soil pore spaces and in the fractures of rock formations. It plays a crucial role in the h

Aquifers are underground layers of water-bearing permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt) from which ground

Most of Earth’s water is salty and stored in oceans, making it unusable for drinking, farming, or daily needs. Freshwater, the kind we can use, is onl

Water is always on the move, changing from one form to another and cycling through Earth’s systems. This process, called the water cycle, is powered b

Water is always moving through a continuous journey called the water cycle. It travels between different reservoirs, including oceans, glaciers, river

Natural resources are materials found in nature that people use for survival, comfort, and building things. These include water, sunlight, air, soil,

Natural resources are divided into two main types: renewable and nonrenewable. Renewable resources can naturally replenish over time, like sunlight, w

Renewable resources naturally restore themselves, such as sunlight, wind, and trees, so we can use them again and again. Nonrenewable resources, like

An ore is a rock that contains enough valuable minerals to be mined for profit. Not all rocks with minerals are ores, only those that are rich enough

Mining is the process of extracting valuable minerals or metals from the Earth. Before any digging starts, studies are done to see if the ore is profi

Underground mining is used to extract valuable ores found deep beneath Earth’s surface. Unlike surface mining, miners cannot dig straight down from th

Earth has a natural greenhouse effect that traps heat from the Sun to keep the planet warm. But burning fossil fuels like coal, gas, and oil releases

Global warming is the long-term rise in Earth’s average temperature. It is mostly caused by human activities, like burning fossil fuels (coal, oil, an

Global warming is the long-term increase in Earth’s average temperature, mostly caused by human activities like burning fossil fuels and cutting down

Greenhouse gases like carbon dioxide, methane, and nitrous oxide trap heat in Earth’s atmosphere and contribute to global warming. These gases come ma

Air quality describes how clean or polluted the air is in a particular place. Poor air quality happens when harmful particles or gases build up in the

Air pollution is the presence of harmful substances in the air that can affect the health of people, animals, plants, and even the environment. These