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Celsius


a scale for measuring temperature; -35 degrees Celsius is the same as -31 degrees Fahrenheit

trekked


traveled, especially slowly or with difficulty

frostbite


an injury to the body caused by extreme cold

glacier


a huge slab of ice that covers a large area of land

sledge


a sled

tentacles


long, flexible body parts of animals like octopus and squid

prey


an animal that is hunted by another animal for food

dissected


cut apart a dead body to study it

texture


the look and feel of something, such as bumpy or smooth

marine biologist


a scientist who studies the ocean