A1.1 HL only Flashcards
saltwater
water that contains a high concentration of dissolved salts, primarily sodium chloride (NaCl)
freshwater
water that occurs naturally on Earth’s surface and has low concentrations of dissolved salts and other solids
closed system
a set of interconnected parts that form a cohesive whole that do not allow matter to enter or leave its boundaries
meteors
space rocks that enter Earth’s atmosphere at high speeds and burn up, creating a streak of light in the sky
asteroids
small objects, rocky in nature, that orbit the Sun
comets
icy bodies made of frozen gases, dust, and rock that orbit the sun
deuterium isotope
a stable, nonradioactive isotope of hydrogen that contains one proton, one neutron, and one electron
gravity
an attractive force that pulls objects towards the center of a celestial body, such as the Earth or the moon
astrobiology
Astrobiology is a branch of biology that studies the origin, evolution, distribution, and future of life in the universe.It also examines the possibility of life in other parts of our solar system and beyond, and whether Earth is habitable
ATP
a molecule found in all living organisms that stores and transfers energy in the form of phosphate bonds
enzymes
proteins that act as catalysts to speed up chemical reactions in living organisms
The Goldilocks Zone
the distance from a star that allows liquid water to exist on a planet’s surface
Europa
one of Jupiter’s four Galilean moons and the sixth-largest moon in our solar system. It’s the sixth-closest moon to Jupiter and is slightly smaller than Earth’s moon
geothermal activity
a series of natural heat transfer processes that occur on the Earth’s surface due to excess heat in the subsurface
