Structure of earth (changes on the surface of earth)

Question 1

thick slabs of tectonic plate. are called?

Answer 1

lithosphere

Question 2

tectonic plates are always _____.

Answer 2

always moving

Question 3

what are the 3 type of tectonic boundaries?

Answer 3

1.convergent (plates move into one another)

2.divergent (plates move apart)

3.transfer (plates move sideway to each other)

Question 4

gradual break down of rocks into a smaller piece. caused by wind, air, rain, living organism

Answer 4

weathering

Question 5

How many group as a weathering and what are those?

Answer 5

(2)
1. Mechanical weathering
2. Chemical weathering

Question 6

________ weathering is the break down of rocks without changing their chemical composition.

Answer 6

Mechanical weathering

Question 7

______ weathering is break down of rocks by rain water.

Answer 7

chemical weathering

Question 8

Rain water is naturally ____

Answer 8

acidic

Question 9

Why rain water is acidic?

Answer 9

because carbon dioxide

and sulfur dioxide in the air dissolve in the water in clouds.

Question 9

the removal and transportation of weathered materials from one place to another by natural agents. what are they called?

Answer 9

Erosion

Question 10

How many type of erosion? and what are those?

Answer 10

(3)
1.erosion by water
2. erosion by gravity
3. erosion by rainwater

Question 11

erosion by _____ occurs when water in rivers, canals and streams wash away soil and rocks around the banks.

Answer 11

erosion by water

Question 12

erosion by ______ occurs as gravity pulls objects toward the center of earth.

Answer 12

erosion by gravity.

Question 13

erosion by rainwater ______ occurs after chemical reaction.

Answer 13

erosion by rain water

Question 14

erosion by rainwater occurs after chemical reaction between what and what?

Answer 14

acid rain and rocks

Question 15

for example of “erosion by rain water” when rain water goes through cracks in a limestone cave, it will dissolve what? and to form what? to accumulates to form new rocks.

Answer 15

dissolve calcium carbonate and form calcium bicarbonate.

Question 16

If calcium bicarbonates accumulates from the ceiling, it is called?

Answer 16

stalactite

Question 17

If it accumulates from the floor it is called?

Answer 17

stalagmite.