What is an atom?

How thick is a human hair in terms of carbon atoms?

• • 500

• • 500,000

• • 5 million

• • 5 billion

If an atom were the size of a marble, how big would a fist full of atoms be?

• • The size of the Hearth

• • The size of a stadium

• • The size of Earth

• • The size of a building

What subatomic particles are found in the nucleus of an atom?

• • Protons and electrons

• • Electrons only

• • Neutrons and electrons

• • Protons and neutrons

What are protons and neutrons made of?

• • Quarks and gluons

• • Molecules

• • Atoms

• • Electrons

Which particle orbits the nucleus of an atom? Write it in capital letters!

If all spaces were removed from the atoms in the Empire State Building, its size would be about the size of a:

• • Basketball

• • Pebble

• • Grain of rice

• • Marble

How many elementary particles are needed to create all elements? Write in capital letter.

Which combination creates a helium atom?

• • Two protons and two neutrons

• • Two protons and one electron

• • One proton and one neutron

• • One proton and two neutrons

The hydrogen in your body is the same as the hydrogen in the: ___ Write in capital letters!