Shared Flashcard Set

Details

Convetion Currents
Test
21
Science
6th Grade
01/12/2012

Additional Science Flashcards

 


 

Cards

Term
Heat Transfer
Definition
Movement of energy from a warm object to a cooler object
Term
Radiation
Definition
Transfer of energy through empty space Ex) Sunlight, heat around a flame
Term
Conduction
Definition
Heat Transfer by direct contact of particles of matter Ex) Spoon left in a pan of soup heating
Term
Convection
Definition

Heat transfer by the movement of a heated fluid (Liquids and gases)

Caused by difference of temperature and density within a fluid

Term
Density
Definition
Measure of how much mass there is in a volume of a substance
Term
Convection Current
Definition
The flow that transfers heat within a fluid
Term
Convection current is set into motion by:
Definition

1. Heating and cooling of the fluid

2. Changes in the fluid's density

3. Force of gravity

Term

Convection Currents flow into the 1.__________ due to heat from the 2.____ and 3._______

 

Definition

1.asthenosphere

2.core

3.mantle

Term
What are Convection Currents and what causes them?
Definition
Convection currents are set into motion by the heating and cooling of the fluid, changes in the fluid's density and the force of gravity combine to set them in motion
Term
State the hypothesis of the Continental Drift
Definition

All the continents had once been joined together in a singe landmass and have since drifted apart

 

Term
Why did most geologists reject the idea of Wegener's idea of the Continental Drift?
Definition
Wegener could not provide a satisfactory explanation for the force that pushes and pulls the continents
Term
Name 3 types of evidence Wegener used to support his hypothesis of the Continental Drift and give an example of each.
Definition

1. Evidence from landforms- Mountain ranges of South America and Africa line up

2.Evidence from fossils-Fossils of the plant Glossopteris in rocks widely seperated landmasses Ex) Africa, S.America, Australia, India, Antartica

3. Evidence from climate- Scratches in rocks made by glaciers found in South Africa

Term
Fossil
Definition
Any trace of an ancient organism that has been preserved in rock
Term

German scientist who hypothesized about Continental Drift

 

Definition

Alfred Wegener

 

Term
A super continent that broke apart about 200 millions years ago
Definition
Pangaea
Term
Give an example of Convection
Definition
A boiling pot of water
Term
Give an example of Radiation
Definition
The sun heating a pool
Term
Give an example of Conduction
Definition
Hot Tea on the stove (steam)
Term
T/F: The transfer of energy through open space is called convection
Definition
False-radiation
Term
The movement of energy from a warmer object to a cooler one is called heat transfer
Definition
True
Term
Conduction is heat transfer by  direct contact of particles of matter
Definition
True
Supporting users have an ad free experience!