Dinosaur Sizes · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

How Big Were Dinosaurs?

Science · Dinosaurs & Paleontology · ages 5-7
Name ______________________   Date ____________

  1. Some dinosaurs were as small as a chicken.

    Circle one:   True   False

  2. Which dinosaur was bigger, Compsognathus or Brachiosaurus?

    • Brachiosaurus
    • Compsognathus
    • They were the same size

  3. Compsognathus was a tiny dinosaur. Which animal was about the same size?

    • An elephant
    • A chicken
    • A horse

  4. Which dinosaur grew as tall as a house?

    • Brachiosaurus
    • a small lizard
    • Compsognathus

  5. A school bus is long. Which word compares Brachiosaurus to a bus?

    • shorter than
    • longer than
    • the same size as

  6. Look at the bars. Which one is the shortest bar?

    Chicken2Bus5Brachiosaurus8
    • Bus
    • Brachiosaurus
    • Chicken

  7. Look at the bars. They show height in meters. How many meters tall was Brachiosaurus?

    Compsognathus1House6Brachiosaurus12

    Answer: ______________

  8. Which sentence is right?

    • Brachiosaurus was taller than a house.
    • A house was taller than Brachiosaurus.
    • Brachiosaurus and a house were the same height.

  9. Sam says, 'Compsognathus was the biggest dinosaur of all.' What is wrong with that?

    • Nothing, it really was the biggest
    • Compsognathus was one of the smallest dinosaurs
    • Compsognathus was not a dinosaur

  10. A house is taller than a chicken. Brachiosaurus was taller than a house. So which was taller, Brachiosaurus or a chicken?

    • A chicken
    • You cannot tell
    • Brachiosaurus
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Answer key

For grown-ups. Fold this page away before handing over the rest.

How Big Were Dinosaurs? W1-mt_u0TeRwRII_-s1

  1. True · Yes. Compsognathus was about as small as a chicken, so some dinosaurs really were tiny.
  2. Brachiosaurus · Brachiosaurus was a giant and Compsognathus was tiny, so Brachiosaurus was bigger.
  3. A chicken · Compsognathus was about as small as a chicken.
  4. Brachiosaurus · Brachiosaurus was a giant dinosaur, tall enough to peek over a house.
  5. longer than · Brachiosaurus was much longer than a school bus.
  6. Chicken · The chicken bar is the shortest, so the chicken is the smallest of the three.
  7. 12 · The Brachiosaurus bar reaches 12, so Brachiosaurus was about 12 meters tall.
  8. Brachiosaurus was taller than a house. · Brachiosaurus was about 12 meters tall, taller than a house at about 6 meters.
  9. Compsognathus was one of the smallest dinosaurs · Compsognathus was one of the smallest dinosaurs, about the size of a chicken. It was not big at all.
  10. Brachiosaurus · Brachiosaurus was taller than a house, and a house is taller than a chicken, so Brachiosaurus was much taller than a chicken.
Worksheet · LightMySky