Teacher Aldo stands in the lab.

Teacher Aldo is in his thirties, with short curly black hair and a shadow of a goatee. He wears glasses and a blue Homework Zone T-shirt.

He says WELCOME TO THE
HOMEWORK ZONE.
I'M TEACHER ALDO AND I'M HERE
TODAY TO TALK TO YOU ABOUT
GRAVITY.
DID YOU KNOW EVERYTHING ON THE
EARTH'S SURFACE IS ATTRACTED TO
ITS CENTER AT THE SAME RATE?
9.8 METRES PER SECOND SQUARED.
THAT'S CALLED GRAVITY.
IF WE WERE TO TAKE ANY TWO
OBJECTS ON THE SURFACE OF THE
EARTH AND RELEASE THEM AT THE
SAME TIME, THEY HIT THE EARTH AT
EXACTLY THE SAME MOMENT.

He drops a small ball and a big ball on the table and they hit the table at the same time.

He says 9.8 METRES PER SECOND SQUARED.
I'M TEACHER
ALDO AND THAT'S GRAVITY.