WorksheetsEvidences of Plate Movement
Total questions: 10
Worksheet time: 5mins
Examine the figure on the left, which two are the best examples of different continental positions in the past?
North America – South America
North America – Africa
South America – Asia
South America – Africa
In the Mid-1900s, scientists mapped mid-ocean ridges using what?
satellites
moons
stars
sonars
Early observers thought continents might have been joined based on what observation?
rocks and fossils
magnetism
earthquakes
coastline
Wegener suggested that coal beds discovered in Antarctica indicated that this continent was _____
always frozen
once underwater
near the equator
part of Africa
Peer scientists reviewing Wegener's hypothesis of continental drift rejected his notion because____________.
his evidence was too few to make a valid conclusion
he did not explain how continents move and what moves them
his evidence was not clear in showing how continents were joined
he lied by including false evidence.
If there are MORE mid-ocean ridges than subduction zones, what happens to the ocean?
it gets larger
it gets smaller
it sinks
nothing will chnage
What do ancient glacier scars found in rock surfaces in Africa tells about its climate in the past?
The continents have not moved
Africa has always been near the equator
Africa was once in an area of the Earth that had a very cold climate
Africa was once covered with ice sheets but did not move ever since.
Which of the following increases with distance from the mid-oceanic ridge?
The age of oceanic lithosphere
The thickness of the lithosphere
The density of oceanic lithosphere
All (A,B,&C)
The Seafloor Spreading Theory states that ________________.
all continents are drifting
ages of rocks near a ridge are older than the ones far from it
fossils of plants and animals are found in almost all continents
hot and less dense material from below the Earth's crust rises towards the surface at the mid-oceanic ridge.
The idea proposed by Alfred Wegener to explain the continental shapes and positions is known as _____.
Pangaea
Plate Tectonics
Continental drift
seafloor spreading
