Dive in! (Check Your Knowledge).

Name: --

Scientists know more about the moon than Earth's deep ocean zones. How much do you know about the planet's vast water world? Circle the correct answer.

1. The oceans contain what percentage of Earth's-water?

a. 48
b. 50
c. 82
d. 97

2. A group of jellyfish is
called a

a. wiggle.
b. smack.
c. pod.
d. virus.

3. The pressure at the
lowest point in the ocean
would make a person feel as
if bench-pressing this many
jumbo jets:

a. 18.
b. 20.
c. 36.
d. 48.

4. The word cephalopod
means

a. flexible skeleton.
b. having tentacles.
c. boneless blob.
d. head-foot.

5. The Humboldt squid's beak and radula (tooth-like
structure) can pulverize a tuna fish in minutes.

a. true
b. false

6. An octopus has approximately how many
suction cups on each tentacle?

a. 240
b. 120
c. 60
d. 32

7. Invertebrate with the largest and most
complex brain:

a. octopus
b. squid
c. sperm whale
d. Portuguese man-of-war

8. Scientists estimate approximately what
percentage of the oceans have been explored?

a. 5
b. 7
c. 10
d. 12

ANSWER

1. d 2. b 3. d 4. d 5. a 6. a 7. a 8. a