2161 Unit 1 Vocabulary Review

 Scientific instruments must be carefully _________________ to achieve precise results.

• constant

• calibrated

• accurate

 Environmentalists are concerned about the ____________________ of plastic waste.

• accumulation

• phenomenon

• reside

The use of fossil fuels has greatly _______________________to climate change. 

• contributed

• derivation

• investigated

A significant population of foreigners ______________ in Oman for better employment  opportunities.

• reside

• available

• contribute

These government documents are highly sensitive and are __________________ only  to authorized persons. 

• accessible

• calibrate

• accumulate

Experts continued to _________________ the cause of the plane crash for several months.

• investigate

• contribute

• accumulate

She ______________ great satisfaction from playing the piano.

• derives

• contributes

• investigates

Gravity is a natural _________________ that pulls everything to the earth’s surface.

• phenomenon

• constant

• theory

The man may lack ______________ understanding of science, but he is capable of coming  up with useful practical solutions to day-to-day problems.

• theoretical

• available

• device

McDonald's has closed its business in Russia ________________ because of the ongoing  war and the resulting uncertainty.

• indefinitely

• accurately

• constantly