Chemistry4 8H Rocks Flashcards

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1
Q

What will happen to the mass of a non-porous rock (interlocking grains) when placed in water?

A

It will stay the same.

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2
Q

What will happen to the mass of a porous rock when placed in water?

A

It will increase.

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3
Q

Name one type of sedimentary rock.

A
  • Sandstone
  • Limestone
  • Mudstone
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4
Q

Name one type of metamorphic rock.

A
  • Slate
  • Gneiss
  • Schist
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5
Q

Name the 4 layers of the Earth.

A
  • Inner core
  • Outr core
  • Mantle
  • Crust
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6
Q

What is the difference between magma and lava?

A

Magma is molten rock stored in the Earth’s crust.

Lava is molten rock that has reached the surface.

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7
Q

What type of rock does magma and lava form?

A

Igneous rock

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8
Q

What is the main feature of igenous rocks?

A

They have crystals.

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9
Q

What is an “ore”?

A

Rock that is mined so that metal can be extracted.

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10
Q

Name the three types of weathering.

A
  • Biological weathering
  • Physical weathering
  • Chemical weathering
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11
Q

Describe how igneous rocks are formed.

A

Igneous rocks are formed when magma/lava cools.

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12
Q

Describe how sedimentary rock is formed.

A

Sediment is deposited in layers. Pressure causes the grains to cement together.

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13
Q

Describe how metamorphic rock is formed.

A

Sedimentary and igneous rock under the surface is put under heat and pressure.

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14
Q

Which types of rock have interlocking grains?

A

Igneous and Metamorphic

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15
Q

Which type of rock has rounded grains?

A

Sedimentary rock

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16
Q

Igneous rocks can form below or above the surface of the Earth. Describe the size of crystal for both types.

A
  • Rocks formed below the surface have LARGE crystals.
  • Rocks formed above the surface have SMALL crystals.
17
Q

In which type of rock are fossils found?

A

Sedimentary rock

18
Q

Why are fossils not found in Igneous or Metamorphic rock?

A

There is too much heat.

19
Q

What type of rock is this? How do you know?

A

Metamorphic. The layers have been distorted.

20
Q
A