You need to use your head to solve this problem.

Liquid nitrogen is very cold, so care must be taken when handling it.

Liquid oxygen is often used as rocket fuel.

I wash my hands with liquid soap every day.

These test results are showing unexpected outcomes.

We analyzed the data of the experimental group.

He has a deep interest in empirical science.

The experimenter analyzed the data in detail.

Animal experiments are necessary for the advancement of science, but there are also ethical issues.

Nuclear tests pose a great threat to world peace.