Team 1
0
Team 2
0
Teams
Name
Score
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Loading
15
×
Where does sea-floor spreading happen?
Mid-ocean trenches
Oops!
Check
Okay!
Check
15
×
What is sea-floor spreading?
The process that adds more crust to the ocean floor by continually adding new material
Oops!
Check
Okay!
Check
25
×
What causes subduction?
Cool, dense oceanic crust collides with less dense continental crust. The oceanic crust sinks because it is more dense.
Oops!
Check
Okay!
Check
15
×
What may happen to an ocean with very few trenches?
It may grow larger because subduction occurs in fewer places.
Oops!
Check
Okay!
Check
15
×
What is subduction?
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle again
Oops!
Check
Okay!
Check
15
×
What are two processes that can change the shape and size of the oceans?
Sea-floor spreading and subduction
Oops!
Check
Okay!
Check
15
×
What is a mid-ocean ridge?
Long chains of mountains that rise up from the ocean floor
Oops!
Check
Okay!
Check
15
×
What is sonar?
A device that uses sound waves to measure the distance to an object
Oops!
Check
Okay!
Check
15
×
Where does subduction occur?
Deep-ocean trenches
Oops!
Check
Okay!
Check
15
×
How often is the ocean floor renewed?
Every 200 million years
Oops!
Check
Okay!
Check
×
thief
Give points!
5
10
15
20
25
×
gift
Win 20 points!
Okay!
×
gift
Win 25 points!
Okay!
×
banana
Go to last place!
Oops!
15
×
What forms the longest mountain chains on Earth?
Mid-ocean ridges
Oops!
Check
Okay!
Check
15
×
What happens to older strips of rock as new material is added to the ocean floor?
They move outward from either side of the mid-ocean ridge
Oops!
Check
Okay!
Check
15
×
What is a deep-ocean trench?
Underwater canyons where subduction occurs
Oops!
Check
Okay!
Check
×
trap
No points!
Oops!
×
magnet
Take 5 points!
Okay!
×
shark
Other team loses 25 points!
Okay!
×
banana
Go to last place!
Oops!
×
seesaw
Swap points!
Oops!
×
magnet
Take 25 points!
Okay!
×
fairy
Take points!
5
10
15
20
25
×
baam
Lose 5 points!
Oops!
×
Restart
Review
Join for Free
;
Your experience on this site will be improved by allowing cookies.
Allow cookies