Year 8 Chemistry - Earth Flashcards
Global Warming, The carbon cycle, climate change, extracting metals, recycling
How is the increase in greenhouse gases has increased the temperature on earth?
The increase in greenhouse gases traps heat in Earth’s atmosphere, leading to a rise in temperature
Name two greenhouse gases?
Carbon dioxide and methane
State the names and percentages of the gases that make up the earths atmosphere
78% nitrogen, 21% oxygen, 1% argon and 0.04% carbon dioxide
What is it meant by global warming?
The graduial heating of the earth. The increase of temperature.
What are the processes that recycle carbon naturally?
photosynthesis, respiration, decomposition, and the carbon cycle
Using the carbon cycle how is carbon recycled?
photosynthesis and respiration
State on cause of global warming that scientists have evidence for?
Burning fossil fuels, Deforestation
How have human activities affect the carbon cycle?
burning fossil fuels and deforestation,
How does global warming impact the climate and local weather patterns?
causing more extreme weather events, changes in rainfall patterns, and shifts in temperatures
What is an ore?
a rock containing enough mineral elements to be extracted
How are the earths resources extracted?
Mining, drilling, and harvesting, digging
How do you choose the extraction method for a metal based on its reactivity data?
more reactive metals are extracted using electrolysis, while less reactive ones use reduction
What factors are there to consider when extracting metals?
reactivity, amount, energy needed, environmental impact, cost
Why are certain natural resources run out?
Some natural resources run out because we use too much and don’t manage them sustainably
Why is recycling some materials important
save resources, reduce waste, minimize pollution, and reduce environmental impact
