la cr'eme glac'ee
used the sun and stars to guide them
used radio waves to help people to explore
radar set pick up echoes that are bounced back from an object
used radar to relay signals
works by using the echoes of the sound waves
used in the ocean
why did humans have to develop technology before they could explore very cold places?
they had to develop technology to survive
what is a insulator?
an insulator is something that stops heat from leaving
what material are good insulators?
fur, feathers, trapped air,wool,and blubber
why are they good insulators
so they could trap the air
what material is a poor insulator
why is it a poor insulator
its because heat moves away from a warm object
how can people breathe underwater
they used oxygen tanks
how can people control whether they float or sink
float-they breth and fill their lungs
sink-let your air out
what technology is used to control buoyancy
a buoyancy compensator was developed to control buoyancy
how can people survive the water pressure in the deep ocean
to survive water pressure go down in a submersible
what contribution has canada made to ocean exploration
1 newt suit 2 deep worker 3 neptune project
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