Astro-
Aud/Audi-
Bene/Bon-
Bio-
100

What does the root word Astr/Astro mean?

Space, stars

100

What does the root word Aud/Audi mean?

to hear

100

What does the root word bene/bon mean?

Good, well

100

What does the root word Bio mean?

life

200

Astronaut

Neil Armstrong was one of the first astronauts who landed on the moon.

A person trained to travel to space.

200

Audience

The audience stood up and clapped at the end of the performance.

A group of people who gather together to listen or watch something.

200

Bonus

I received a bonus on my last paycheck.

Something in addition to what is expected

200

Biology

We dissected a cat in biology class to learn about its anatomy.

Science that deals with things that are alive such as plants and animals

300

Asteroid

What would happen if a giant asteroid hit the earth?

a small rocky planet that circles around the sun

300

Auditorium

We gathered in the auditorium to watch the school play.

A large room or building where people gather to watch or listen to a performance.

300

Beneficial

The study group after school was beneficial to my learning.

Producing good or helpful results

300

Biography

I read an inspiring biography about Helen Keller. 

The story of a real person's life written by someone else.

400

Astronomer

The astronomer discovered the four moons of Jupiter


A person who studies stars, planets, and outer space.

400

Audition

I auditioned for the role of Peter Pan in the school play.

A short performance to show the talents of someone.

400

Benign

Doctors removed the tumor and discovered it was benign

Not causing death or serious injury; not cancerous

400

Biologist

My brother was interested in human genetics so he became a biologist.

A person who specializes in the field of biology/living organisms. 

500

Asterisk

The words on the page were followed by an asterisk.


A symbol used in printed text to tell someone to read a note at the bottom of the page.

500

Audio

Our teacher played an audio recording of several famous speeches.

Sound that is heard on the radio or a recording

500

Bountiful

Since we had a bountiful harvest this year, we were able to donate a good portion of our crops to the local soup kitchen. 

We live by the ocean and have bountiful supply of fresh lobster.


large amount; many desired things

500

Biodegradable

I threw my banana peel out the window when I was driving because the peel is biodegradable. 

Capable of being slowly destroyed and broken down into very small parts by natural processes. 

600

Astronomical

The electricity bill was astronomical in December because we hung so many Christmas lights.

Extremely large; or relating to science

600

Audiology

My sister who is deaf got me interested in the field of audiology

The study of hearing, balance, and related disorders.

600

Benevolent

The benevolent company donated millions of dollars to education. 

kind and generous

600

Antibiotic

The doctor prescribed an antibiotic for the boy's infection. 

A drug that is used to kill harmful bacteria and to cure infections.

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