When did Pachycephalosaurus live?

Late Cretaceous, about 70 to 66 million years ago

What do scientists debate about the dome?

Whether it was used for head-butting, flank-butting or display

What did Pachycephalosaurus mainly eat?

Plants, possibly some other foods

Which famous dinosaurs shared its time and place?

Spinosaurus and Carcharodontosaurus

Pachycephalosaurus Quiz: The Dome-Headed Dinosaur

The name means thick-headed lizard, and scientists still argue about what that bony dome was for, as this Pachycephalosaurus quiz explains. Play an interactive set of 10 questions on Hell Creek, head-butting versus flank-butting, the spiky knobs, Dracorex and Stygimoloch as possible juveniles, its leaf-shaped teeth and its neighbors T. rex and Triceratops.

Start Pachycephalosaurus Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Name
What does Pachycephalosaurus mean?
Dome
Roughly how thick could the skull dome be?
When
When did Pachycephalosaurus live?
Where
In which region have its fossils been found?
Debate
What do scientists debate about the dome?
Knobs
What surrounded the dome?
Juveniles
Which two dinosaurs may be younger forms of Pachycephalosaurus?
Diet
What did Pachycephalosaurus mainly eat?
Walking
How did Pachycephalosaurus walk?
Neighbors
Which famous dinosaurs shared its time and place?

Explanations: answer key for all 10 questions

Q1: What does Pachycephalosaurus mean?
Answer: Thick-headed lizard
The name refers to its domed skull.
Q2: Roughly how thick could the skull dome be?
Answer: About 25 centimeters
Solid bone made it one of the thickest skulls known.
Q3: When did Pachycephalosaurus live?
Answer: Late Cretaceous, about 70 to 66 million years ago
It lived until the mass extinction.
Q4: In which region have its fossils been found?
Answer: Western North America
Fossils come from rocks such as the Hell Creek Formation.
Q5: What do scientists debate about the dome?
Answer: Whether it was used for head-butting, flank-butting or display
Studies of injuries suggest some combat.
Q6: What surrounded the dome?
Answer: Bony knobs and small spikes
They may have helped in display.
Q7: Which two dinosaurs may be younger forms of Pachycephalosaurus?
Answer: Dracorex and Stygimoloch
Jack Horner and Mark Goodwin proposed the idea in 2009.
Q8: What did Pachycephalosaurus mainly eat?
Answer: Plants, possibly some other foods
Its small leaf-shaped teeth suited plant food.
Q9: How did Pachycephalosaurus walk?
Answer: On two legs
It was a bipedal ornithischian.
Q10: Which famous dinosaurs shared its time and place?
Answer: Tyrannosaurus and Triceratops
They lived in the same Late Cretaceous ecosystems.

Pachycephalosaurus Quiz – The Dome-Headed Dinosaur

Pachycephalosaurus, the thick-headed lizard, lived in western North America about 70 to 66 million years ago. Its skull dome could be around 25 centimeters thick, ringed by bony knobs and small spikes.

Scientists debate how the dome was used. Some think it was used for head-butting, others for flank-butting or display. Injuries on some skulls suggest real combat. Dracorex and Stygimoloch may be younger growth stages of the same animal.

Pachycephalosaurus walked on two legs and mainly ate plants with small leaf-shaped teeth. It shared its world with Tyrannosaurus rex and Triceratops.

What This Quiz Teaches

Dinosaur fans will enjoy these questions.

What the name means
How thick the dome was
How the dome may have been used
What it ate
Which dinosaurs lived nearby

Did You Know?

Most fossils are skulls rather than full skeletons.
It was about 4.5 meters long.
Pachycephalosaurs had stiff backbones.
The dome changed shape as animals grew.
It appears in several Jurassic Park films.