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