#1
#2
#3
#4
#5
100

What are the three layers of the Earth?

Crust, mantle and core

100

Which is the only rock that floats?

pumice

100

How long would it take to walk to the moon?

9 years

100

What is the largest organ in the human body?

skin

100

The U.S. hosted the FIFA World Cup for the first time in 1994. Which country won the game?

Brazil

200

How many elements are on the periodic table?

118

200

How long is the memory of a goldfish?

6 months

200

Which animal did Australia go to “war” with in 1932?

emu

200

What is the heaviest internal organ in the human body?

The liver

200

 Which planet was downgraded to a dwarf planet in 2006?

Pluto

300

How do you determine the age of a tree?

Count its growth rings

300

What is the name of the red pigment found in vertebrates that functions in oxygen transport?

hemoglobin

300

What is the largest mammal in North America?

Bison

300

Where did Albert Einstein live before moving to the United States?

Germany

300

What year did Google launch?

1998

400

How many bones do sharks have?

0

400

What is it called when a solid changes directly into a gas?

sublimation

400

How many bones are in a giraffe’s neck?

7

400

How old was Queen Elizabeth II when she became the queen of England?

25

400

In 1996, a sheep became the first mammal cloned from an adult somatic cell. What was the name of that sheep?

Dolly

500

What does a Geiger counter measure?

Radiation

500

How long does it take our solar system to complete one orbit around the galactic center?

About 230 million years

500

How much water do Americans use at home each day?

About 50 gallons

500

In what year did the Berlin Wall fall?

1989

500

What year did the internet become available to the public?

1993