Physical or Chemical
Molten Iron.
Physical.
H
What is Hydrogen?
H2O
What is water?
It's nicknamed the ISS, which is an acronym of it's name. (It's in orbit right now)
Rusted hinge.
Chemical.
C
What is Carbon?
O2
What is oxygen?
What is the Hubble Space Telescope? (+100 What did Hubble's first images expose?)
Unbendable.
Physical.
N
What is Nitrogen?
CO2
Carbon Dioxide
The shuttle that exploded during take off in 1986?
What was the Challenger Space Shuttle? (+200 What grade was Mr. Atchison in?)
It built the extended structure of yesterday's slime.
Chemical reaction.
Pu
What is Plutonium?
NaCl (Sodium Chloride)
Table salt
The scientist that popularized science and did NOT coin the phrase, "Billions and Billions" but is known for it.
Who was Carl Sagan? (+300 What TV series did Mr. Atchison watch, as a child, that Mr. Sagan starred in?)