rocks and minerals

Question 1

difference between rocks and minerals

Answer 1

minerals- inorganic substances occurring naturally
rocks - consilated materials composed of grains

Question 2

define igneous rocks

Answer 2

rocks formed when magma is being ejected

Question 3

difference between intrusive rocks and extrusive

Answer 3

intrusive- when magma cools and solidifies
extrusive- when lava solidifies on the earths surface

Question 4

write 3 types of rocks and give examples

Answer 4

ingenous- formed wwhen magama iks being ejected
sedimentary-when particles or other rocks are hidden
metaphoric

Question 5

what is weathering

Answer 5

mechanical breakdown or chemical decay of rocks

Question 6

explain the 3 types of weathering

Answer 6

physical weathering-effects of changing temperature
chemical weathering- caused by rain water reacting with minerals
biographical weathering- living organisms contribute to weathering

Question 7

name the 4 agents of weathering

Answer 7

weathering
plant
animals
people

Question 8

what is rock cycle

Answer 8

representation of changes between the 3 rocks

Question 9

write the 5 significance of rocks

Answer 9

rocks weather to form soil which is important in agriculture
they are tourist attraction
coal is used as fuel foe heating
source of building materials
pumice is used for scrubbing stones

Question 10

name the 2 types of physical weathering

Answer 10

exfolition- the peeling of rockss due to heating and cooling
freeze-thaw - occurs when water continually seeps into cracks