Mitchell, McCormick, and Salk

Jonas Salk will always be remembered as a great

• scientist
• President
• bike racer

What is a vaccine?

• an x-ray
• a bottle of lotion
• a game
• a shot to help you fight a disease

What did Dr. Salk's vaccine do?

• raised money for the war
• killed the polio virus using a person's immune system
• helped people move from cities
• caused trains to stop

Who discovered the vaccine for polio?

• Charles Darwin

• Elizabeth Blackwell

• Jonas Salk

• Charles Drew

What discovery made Maria famous?

• Being a woman. 
• Her storytelling. 
• Scanning the skies for planets.
• A telescopic comet. 

Maria Mitchell Was the First Woman _____.

• To have Encephalopathy

• To be an Astronaut

• To be an Astronomer

• To be from NASA

What did Cyrus McCormick develop?

• a comet

• a wheat fertilizer

• a tractor

• the mechanical reaper

Who discovered a comet?

• Bill Gates

• Cyrus McCormick

• Maria Mitchell

• Jonas Salk

McCormick's new machine combined many steps involved in harvesting what?

• crops

• space

• candy

• animals

Cyrus' invented a horse-drawn reaper that used what?

• telescopes

• men working in the field

• back and forth cutting blades

• wind to run the machine