The zoologist watched the gorilla
They were exploring the ocean floor
She's always loved travel
They launched the rocket
The scientists sent a rocket to space
The investigation
By observing student behavior,
lasted for six weeks.
on a small, hanheld monitor.
straight up to the sky.
teachers can decide how to plan their lessons.
to study Earth's atmosphere.
and exploration.
when they came across a giant crab.
Natural resources
Too much rainforest is being lost-
Tigers
Currently, there are more than 1,500
Don't use up all the milk-
The surface of the table
I want to have cereal for breakfast tomorrow.
we have to do a better job to preserve it!
are an endangered species.
satellites orbiting Earth.
was badly scratched.
like oil and gas are an important part of the economy.