Its thick CO2 atmosphere traps so much heat it's hotter than Mercury, despite being farther from the Sun.
CO2 and other gases trap just enough heat to keep temperatures suitable for life.
Just right for liquid water.
Holds an atmosphere, without crushing life.
Shields us from UV rays.
Deflects cosmic rays and solar wind.
Gases for breathing, the greenhouse blanket.
All of Earth's water.
The solid Earth — rocks, soil, minerals.
All living things and their homes.
One parent, exact copies — vegetative propagation, binary fission.
Two parents, a mix of traits — pollination, fertilisation, animal mating.
Gametes meet outside the body, usually in water — fish and frogs.
Gametes meet inside the body — birds lay fertilised eggs; most mammals develop the embryo internally.
Burning fossil fuels releases greenhouse gases, warming the planet.
Habitat destruction disrupts food chains and ecosystems.
Air, water, and soil pollution harm health, crops, and wildlife.
Ozone-depleting substances.
Environment and development.
Greenhouse gas reduction.
Limiting warming below 1.5°C.
Distance from a star where water stays liquid.
Heat trapped by atmospheric gases.
Gases around Earth / all its water.
The solid Earth / all living things.
One parent, exact copies / two parents, mixed traits.
Pollen transfer / gametes fusing.
Climate change, biodiversity loss, pollution.