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Chapter 8
Plate Tectonics
22
Science
6th Grade
03/12/2010

Additional Science Flashcards

 


 

Cards

Term
climate
Definition

Climate is the usual weather

conditions in a place over

a long period of time.

Term
gravity
Definition

Gravity is the force the objects apply on

each other because of their mass.

 

Term
density
Definition

Density is the measurement giving mass per unit of volume of a substance.

Term

hypothesis

 

Definition

A hypothesis is a possible explanation for something that can be tested in some way.

Term
mantel
Definition

Mantel is an  

area of hot rock that

flows beneath the surface

Term
mid ocean ridge
Definition

A mid-ocean ridge is a  

long, underwater mountain range.

Term
tectonic plate
Definition

Tectonic plates are 

slabs of rock that make

up Earth’s crust.

Term
lithosphere
Definition

The lithosphere is  

all of Earth’s crust and

some of the liquid rock

beneath it.

 

(think about an egg)

Term
core
Definition

The core is a 

ball of hot metals at

Earth’s crust.

Term
Pangaea
Definition

Pangaea is the ancient landmass that

included all the continents

joined together.

 

Term

What are four type of evidence

that plates move?

 

 

Definition

·       Climate

·       Fossils

·       Rock types

·       Mid-ocean ridges

Term

How do plates move to form

mountains on land?

 

 

 

Definition

Plates move past each other

or on top of each other.  When

they do, they move in a jerking

way causing earthquakes.

Term

How does hot rock near mid-ocean

ridges cause late to move?

 

Definition

Rising liquid rock breaks thorough

Earth’s crust and pushes the plates.

 

Term

What causes plate motion?

 

 

 

Definition
Continental drift causes plate motion.
Term

 

At what boundary do plates

move away from each other?

Definition
They move from each other at divergent boundaries.
Term

What are the three main

layers of Earth?

 

Definition

·       Crust

·       Mantel

·       Core

Term

What are two types of

evidence that support

the tectonic plate theory?

 

Definition

·       Shape of the continents

·       Location of volcanoes

Term

How long did it take the

Earth’s surface to change?

 

Definition
It took millions of years for the earth's surface to change.
Term

What are the pieces of

the lithosphere called?

 

 

Definition
The pieces of the lithosphere are called tectonic plates.
Term

What are mid-ocean ridges?

 

Definition

Mid-ocean ridges are underwater

mountain ranges.

Term

Where is the youngest rock found?

 

Definition
The youngest rock is found at mid-ocean ridges.
Term

How far do tectonic plates

move each year?

 

Definition
Tectonic plates only move a few centimeters a year.
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