PASSIVE vs ACTIVE VOICE

1. Physicists study the behavior of matter and energy in the universe.

• PASSIVE VOICE

• ACTIVE VOICE

1. Biologists ____________ (explore) ecosystems to understand biodiversity.

PASSIVE VOICE vs ACTIVE VOICE

present

Chemists ___________ new materials for sustainable energy solutions.

• research

• is researched

• are researched

• researches

1. Marine biologists ________ (study) marine life to conserve ocean ecosystems.

ACTIVE VOICE vs PASSIVE VOICE

present

1. Organic chemists ____________ compounds for pharmaceutical applications.

• 1. are synthesized

• 1. is synthesized

• 1. synthesize

• 1. synthesizes

1. DNA is analyzed to study inherited traits by geneticists.

• ACTIVE VOICE

• PASSIVE VOICE

The effects of climate change on coral reefs ________ (study) by marine biologists.

• studies

• are studied

• is studied

• study

1. Edward Jenner developed the first successful smallpox vaccine in the 18th century.

• ACTIVE VOICE

• PASSIVE VOICE

1. The first successful smallpox vaccine ____________ (develop) by Edward Jenner in the 18th century.

2. PASSIVE VOICE vs ACTIVE VOICE

   simple past
   

The equations of electromagnetism ______ (formulate) by James Clerk Maxwell in the 19th century.

PASSIVE VOICE vs ACTIVE VOICE
simple past