Some companies think they will be able to ______ tourists into space within the next few years., launch, monitor, The researchers want to ______ the natural beauty of the ocean., use up, preserve, Some experts are worried that humans will ______ the Earth’s supply of oil one day., use up, come across, I bought a telescope so I can ______ the stars at night., preserve, observe, The equipment used to ______ the ocean floor is very expensive., monitor, come across, Underwater vehicles are often used for ocean ______., atmosphere, exploration, Sometimes, ______ are used to predict the weather., satellites, resources, Scientists are continuing their ______ into why the rocket exploded upon take-off., investigation, resources, Too much pollution can create a dirty and unpleasant ______., atmosphere, species, The ocean contains many useful ______ , such as salt, sand, copper, and oil., resources, investigations, Many ______ that live in the ocean are still being studied by scientists., satellites, species, The tourists didn’t ______ any rare type of fish on their boat trip., come across, launched, I love to float on the ______ of the water. It’s so relaxing., surface, atmosphere

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