Survival
People cannot _______ without air, water, and food.
live
It is difficult for humans to survive in ___________ environments, such as very hot or very cold places.
extreme
All animals and plants are examples of ____________.
life forms
Humans can _________ for about three days without water.
survive
The necessary __________ for human life are oxygen, food, and water.
elements
Humans need ___________ to breathe.
oxygen
Camels, lizards, and snakes are ________ animals of the desert.
typical
A _______________ is a device to see tiny objects that humans can’t see.
microscope
Polar bears live in the cold ______________ of the Arctic with windy winters and few species of plants and animals.
environment
An ______________ is a tiny creature that lives in an extreme environment.
extremophile
Animals survive if they __________ to changes in their environment.
adapt
Last school year ended _____________, and I passed to the next grade with honors.
successfully
Scientists study extremophiles under a microscope in a _________.
laboratory
Many small animals can live in extreme ___________, such as very low temperatures or a lot of rain.
conditions
Few animals can survive a long-term __________ water, food, or oxygen.
lack of
Extreme conditions such as very hot/cold temperature and unstable habitat are not considered __________ for most animals.
livable
The pig-nosed frog is a ________ animal that isn't often seen in the wild.
rare
Scientists study extremophiles under a microscope in a __________.
laboratory
After one week without water, the plant was still ________!
alive
Camels are able to __________ the extreme heat of the desert.
handle