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Earth Science (7th Grade)
What is unconformity?
Which layers of the Grand Canyon eroded first?
Earth Science (7th Grade)
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Earth History (7th Grade)
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Answers
1
Which layers of the Grand Canyon eroded first?
The limestone layers
The bottom layers
The sandstone layers
The top layers
2
What is unconformity?
A gap in the rock column
Two of the same layers right next to each other
A lack of limestone
Overlapping rock layers
3
Which of the following does NOT indicate a sand dune or desert environment?
Reptile tracks
Crossbedding
Palm leaves
Sandstone
4
Which two things are true of an igneous rock with large crystals?
Cooled quickly; extrusive
Cooled quickly; intrusive
Cooled slowly; intrusive
Cooled slowly; extrusive
5
What explains how igneous, metamorphic, and sedimentary rocks change from one to the other?
Acid Testing
Rock Cycle
Rock Column
Geological Time Scale
6
How could granite change into sandstone?
It can't
Weathering, erosion, and deposition
Heat and Pressure
Melting
7
What type of rock forms when magma cools below Earth's surface?
Metamorphic
Extrusive Igneous
Intrusive Igneous
Sedimentary
8
Which of the following is NOT true about the geological time scale?
Describes the history of Earth in millions of years
It arranges geological events in order from oldest-youngest
It is a scale used to measure diameter of rocks
Shows geological time divided into eras, periods, and epochs
9
How was the Grand Canyon different 6 million years ago?
There were cities of people there
All layers were there (none had eroded)
It did not exist
All of the rock was limestone
10
How do sedimentary and igneous rocks change into metamorphic rocks?
Erosion and Deposition
Evaporation
Melting
Heat and Pressure
11
Calcium in seawater combines with carbon dioxide produced by living organisms to form _________
Shale
Magma
Oxygen
Calcium Carbonate
12
Which of the following is NOT a question asked by geologists?
How wide is the canyon?
Are there fossils that can help determine the age of layers?
How old are these rock formations?
Do these formations match formations in other areas?
13
Which type of rock forms from rocks changing by heat and pressure?
Metamorphic
Igneous
None of the above
Sedimentary
14
What is an inference?
conclusion based on observation and experience
An educated guess
an experiment
Information gathered from 5 senses
15
Which is NOT true of a tilted rock layer that has coral fossils and fizzes with acid?
It formed on a flat layer
It formed in deep water
It formed in shallow water
It contains calcite
16
Which type of rock CANNOT change into another over time?
None of the above
Metamorphic
Igneous
Sedimentary
17
Which type of rock forms from layers of sediment that have been cemented with a matrix?
Metamorphic
Sedimentary
Igneous
None of the above
18
What is an observation?
Info gathered directly using 5 senses
Only the things that we see
An educated guess
Our past experiences
19
How do igneous and metamorphic rocks change into sedimentary rocks?
Evaporation
Heat and Pressure
Melting
Erosion and Deposition
20
Which of the rocks below is a sedimentary rock?
Granite
Basalt
All of the above
Limestone
21
How can you determine which rock layer is older?
The thicker the layer, the older it is
The lower the layer, the older it is
The higher the layer, the oldest it is
The thinner the layer, the older it is
22
Fossils that help geologists determine the age of rock layers are called...
Prehistoric fossils
Paleozoic fossils
Index fossils
Ancient fossils
23
How do sedimentary and metamorphic rocks change into igneous rocks?
Evaporation
Erosion and Deposition
Melting
Heat and Pressure
