Name:_________________________________________________#__________Date:________________________
Science Study Guide
Chapter 4
Test Date: __________________________________________________
Parent Signature: __________________________________________
Directions: Write T for true and F for false. Correct false statements.
1.______
The ancient continent that contained all the landmasses was called Gondwana.
2. ______
Wegener believed that the continents originally broke apart about 200 million years ago.
3.______
The hypothesis that continents have slowly moved to their current locations is called
continental drift.
4.______
Glomar is a fossil plant that helps support the theory of continental drift.
5. ______
The presence of the same fossils and rocks on several continents supports the hypothesis
of continental drift.
Directions: Fill in the blank: surface, youngest, molten, mid-ocean, rock, fossils
6. Matching _____________________ structures on different continents are evidence for
continental drift.
7. ___________________, rocks and mountain ranges, and ancient climate records provide evidence of
the theory of continental drift.
8. Sea-floor spreading takes places at _________________ ridges.
9. Sea-floor spreading occurs because _______________ material beneath Earth’s crust rises to the
___________________.
10. The _______________________ oceanic crusts are located at mid-ocean ridges.
Directions: Match the correct word with its definition.
11._____
Drives sea floor spreading inside Earth
a. Magnetic field
12._____
Has reversed itself several times in the past
b. Oceanic and Continental
13._____
Occur where the edges of plates run into each other
c. Density
14._____
The two types of lithosphere
d. Convection currents
15._____
Causes hot, plastic like rock in the asthenosphere
e. Earthquakes and Volcanoes
to rise toward the Earth’s surface.
Directions: Use the drawings below to answer questions 16 and 17.
16.
Which letter shows the location of the oldest rock? _______
Which letter shows the location of the youngest rock? ________
17.
Which letter shows where hot, molten rock is forced upward toward the seafloor ? ____
Which letter shows new seafloor moving away from the ridge and becoming cool, more
dense, and sinking? ______
Directions: Circle the choice of the best answer.
18. The alignment of iron minerals in rocks when they are formed reflects the fact that Earth’s
_________ has reversed itself several times in the past.
a. magnetic field
b. core
c. gravity
19. Earthquakes and ______ occur where the edges of plates run into each other.
a. ridges
b. volcanoes
c. rivers
20. What are the two types of lithosphere?
a. continental and oceanic
b. oceanic and sulfuric
c. sulfuric and continental
21. Differences in _____ cause hot, plastic like rock to rise towards the Earth’s surface.
a. velocity
b. viscosity
c. density
22. The continental lithosphere is ___
a. thick
b. thin
c. soft
23. ____ provides matter and energy for plate motion.
a. the Sun
b. the weather
c. convection
24. Which description best matches the rate at which tectonic plates move?
a. a race car on race day
b. the growth of a fingernail
c. speed of a bicycle