Earth Benchmark Flash Cards
Front • Questions
Earth Science Benchmark Flash Cards
Print 2-Sided (Flip on Long Edge) Page 1 of 8
Earth Interior #01 • FRONT
Benchmark Question
What is Earth's outer layer like in physical properties and state of matter?
Think About: The solid crust and uppermost rigid mantle forming the tectonic plates.
Q1 Benchmark Review Answer on Back
Earth Interior #02 • FRONT
Benchmark Question
What is the upper part of the mantle like, and what is it made of?
Think About: The asthenosphere layer directly beneath the rigid lithosphere.
Q1 Benchmark Review Answer on Back
Plate Dynamics #03 • FRONT
Benchmark Question
Which layer of Earth has convection currents that cause the tectonic plates to move?
Think About: Thermal energy transfer from deep within Earth's interior.
Q1 Benchmark Review Answer on Back
Geologic Activity #04 • FRONT
Benchmark Question
Where on Earth do the vast majority of earthquakes & volcanoes occur?
Think About: Global geographic distribution patterns and plate margins.
Q1 Benchmark Review Answer on Back
Plate Boundaries #05 • FRONT
Divergent Boundary
How do plates move at a DIVERGENT boundary, and how do they interact with the mantle?
Plate 1 | Plate 2
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Plate Boundaries #06 • FRONT
Convergent Boundary
How do plates move at a CONVERGENT boundary, and how do they interact with the mantle?
Plate 1 | Plate 2
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Cards 1–6 (Front Side) • Cut along solid borders after printing Duplex Sheet 1 (Side A)
Back • Answers
Benchmark Answer Key (Mirrored)
Reverse side of Sheet 1 Page 2 of 8
Benchmark Key #02 • ANSWER
Correct Answer
Soft, Solid Rock
The upper mantle (asthenosphere) is made of solid rock under immense heat and pressure that is ductile/plastic and able to slowly flow.
Crucial Distinction: It is NOT liquid magma; it is a soft, pliable solid that convects over geologic time.
Verified Benchmark Key Card #02
Benchmark Key #01 • ANSWER
Correct Answer
Hard, Solid Rock
Earth's outermost layer (the crust and uppermost rigid mantle) is made entirely of hard, solid rock that forms the tectonic plates.
Study Tip: Both continental and oceanic crust are hard, solid rock (even under ocean water!).
Verified Benchmark Key Card #01
Benchmark Key #04 • ANSWER
Correct Answer
Along Plate Boundaries
Earthquakes and volcanoes are concentrated tightly along the borders of tectonic plates where plates collide, separate, or slide past one another.
Map Observation: They form linear belts (like the "Ring of Fire") rather than being scattered randomly across continents.
Verified Benchmark Key Card #04
Benchmark Key #03 • ANSWER
Correct Answer
The Mantle
Convection currents circulate in the mantle. Deep geothermal heat warms rock causing it to rise; as it nears the crust it cools and sinks, dragging the tectonic plates above.
Density Rule: Hot mantle rock = less dense (rises). Cool mantle rock = denser (sinks).
Verified Benchmark Key Card #03
Benchmark Key #06 • ANSWER
Correct Answer
Move Towards Each Other (→ | ←)
Plates move towards each other. One denser plate moves underneath the other plate and sinks into the mantle (subduction), recycling old crust.
Direction Arrows: Plates converge: → | ←
Verified Benchmark Key Card #06
Benchmark Key #05 • ANSWER
Correct Answer
Move Away From Each Other (← | →)
Plates move away from each other. Magma rises from the mantle into the fracture and hardens, adding new solid rock to the edges of both plates.
Direction Arrows: Plates diverge: ← | →
Verified Benchmark Key Card #05
Cards 1–6 (Reverse Answer Side) • Perfectly aligns with Page 1 when printed 2-sided Duplex Sheet 1 (Side B)
Front • Questions
Landforms & Boundary Patterns
Print 2-Sided (Flip on Long Edge) Page 3 of 8
Landforms #07 • FRONT
Oceanic Divergent
What type of landform is created at an Oceanic Divergent boundary?
Select from benchmark options:
• Mountains • Trenches • Volcanic mtns • Ridges • Rift Valleys
Q1 Benchmark Review Answer on Back
Landforms #08 • FRONT
Continental Divergent
What type of landform is created at a Continental Divergent boundary?
Select from benchmark options:
• Mountains • Trenches • Volcanic mtns • Ridges • Rift Valleys
Q1 Benchmark Review Answer on Back
Landforms #09 • FRONT
Oceanic / Continental Convergent
What types of landforms are created at an Oceanic / Continental Convergent boundary?
Hint: Multiple features form together:
• Mountains • Trenches • Volcanic mtns • Ridges • Rift Valleys
Q1 Benchmark Review Answer on Back
Landforms #10 • FRONT
Continental / Continental Convergent
What type of landform is created at a Continental / Continental Convergent boundary?
Select from benchmark options:
• Mountains • Trenches • Volcanic mtns • Ridges • Rift Valleys
Q1 Benchmark Review Answer on Back
Earthquakes #11 • FRONT
Multiple Selection
Where do you typically have the MOST earthquakes? (Select all that are correct)
a) Where two plate boundaries meet
b) Where two converging plates meet
c) Where two transform boundaries meet
Q1 Benchmark Review Answer on Back
Data & Maps #12 • FRONT
Scientific Pattern
You are looking at a world map showing earthquakes and volcanic activity. What does the pattern tell you about why they happen?
Observation: Quakes and volcanoes trace identical linear belts around the globe.
Q1 Benchmark Review Answer on Back
Cards 7–12 (Front Side) • Cut along solid borders after printing Duplex Sheet 2 (Side A)
Back • Answers
Benchmark Answer Key (Mirrored)
Reverse side of Sheet 2 Page 4 of 8
Benchmark Key #08 • ANSWER
Correct Landform
Rift Valleys
As thick continental crust stretches and pulls apart, the rock faults and drops down to form a deep fracture basin known as a rift valley.
World Example: East African Rift System. If rifting continues, it can become a new ocean basin!
Verified Benchmark Key Card #08
Benchmark Key #07 • ANSWER
Correct Landform
Mid-Ocean Ridges
When oceanic plates separate, rising magma builds an expansive underwater volcanic mountain chain called a mid-ocean ridge.
Key Process: Seafloor spreading continually creates new oceanic basalt crust at the ridge crest.
Verified Benchmark Key Card #07
Benchmark Key #10 • ANSWER
Correct Landform
Mountains (Folded Mountains)
Both continental plates have low density and cannot subduct deep into the mantle. The collision compresses and thrusts the crust upward into towering mountain chains.
World Example: The Himalayan Mountains formed from the ongoing collision of India and Asia.
Verified Benchmark Key Card #10
Benchmark Key #09 • ANSWER
Correct Landforms
Trenches & Volcanic Mountains
The denser oceanic plate subducts underneath the continental plate, creating a deep ocean trench at the seafloor and melting rock that erupts into volcanic mountains inland.
Highlight Both: On the test, circle both Trenches and Volcanic mountains!
Verified Benchmark Key Card #09
Benchmark Key #12 • ANSWER
Pattern & Cause
Occur At or Near Plate Boundaries
The Pattern: Earthquakes and active volcanoes concentrate in narrow zones along tectonic plate boundaries because that is where plates actively collide, grind, and fracture.
Benchmark Key Sentence: "Earthquakes and volcanic activity occur at or near plate boundaries."
Verified Benchmark Key Card #12
Benchmark Key #11 • ANSWER
Correct Choices
ALL THREE ARE CORRECT (a, b, & c)
You experience high earthquake activity at all of these locations:
- ✔ a) Where two plate boundaries meet
- ✔ b) Where two converging plates meet
- ✔ c) Where two transform boundaries meet
Benchmark Instruction: Highlight or circle ALL THREE options!
Verified Benchmark Key Card #11
Cards 7–12 (Reverse Answer Side) • Perfectly aligns with Page 3 when printed 2-sided Duplex Sheet 2 (Side B)
Front • Questions
Seafloor, GPS & Rock Types
Print 2-Sided (Flip on Long Edge) Page 5 of 8
Seafloor Spreading #13 • FRONT
Benchmark Question
In regards to seafloor spreading, is the oceanic crust farther away from the mid-ocean ridge older or younger?
Think About: Magma continuously erupts at the ridge center and moves outward like a conveyor belt.
Q1 Benchmark Review Answer on Back
Earth Dimensions #14 • FRONT
Benchmark Question
If new crust is constantly being added to the edges of plates at divergent boundaries, why is our Earth not getting any larger?
Think About: What is happening to older crust on the opposite side of tectonic plates?
Q1 Benchmark Review Answer on Back
Geology Tools #15 • FRONT
Benchmark Question
Why do geologists use GPS (Global Positioning System) to monitor plate motion?
Think About: How fast or slow tectonic plates move relative to human vision.
Q1 Benchmark Review Answer on Back
Earth History #16 • FRONT
Two-Part Question
1. What is the name of the ancient Supercontinent?
2. According to the rock record, how old is Earth?
Key Fact: Deep geologic time and continental drift evidence.
Q1 Benchmark Review Answer on Back
Rock Formation #17 • FRONT
Sedimentary Rock
How does Sedimentary rock form from existing rocks and sediments?
Identify the 4 key stages: Breaking down, moving, squeezing, and gluing.
Q1 Benchmark Review Answer on Back
Rock Formation #18 • FRONT
Igneous Rock
How does Igneous rock form?
Think About: The two fundamental physical phase changes involving molten rock.
Q1 Benchmark Review Answer on Back
Cards 13–18 (Front Side) • Cut along solid borders after printing Duplex Sheet 3 (Side A)
Back • Answers
Benchmark Answer Key (Mirrored)
Reverse side of Sheet 3 Page 6 of 8
Benchmark Key #14 • ANSWER
Correct Answer
Subduction Destroys Old Crust
It's not getting larger because subduction (old crust going back into the mantle) is occurring on the other side of the plate.
Dynamic Balance: Crust creation at mid-ocean ridges equals crust destruction at deep ocean subduction trenches!
Verified Benchmark Key Card #14
Benchmark Key #13 • ANSWER
Correct Answer
It is OLDER
Crust is OLDER the farther you get from the mid-ocean ridge. The youngest crust is always directly at the center of the ridge crest where new magma solidifies.
Benchmark Key Sentence: "It is OLDER the farther you get from the mid ocean ridge."
Verified Benchmark Key Card #13
Benchmark Key #16 • ANSWER
Correct Answers
Pangaea & 4.6 Billion Years Old
- • Supercontinent: Pangaea (existed ~250–300 million years ago).
- • Earth's Age: 4.6 Billion years old according to the rock record and radiometric dating.
Watch the Units: Remember 4.6 Billion years old (not million!).
Verified Benchmark Key Card #16
Benchmark Key #15 • ANSWER
Correct Answer
Motion is Too Slow to be Seen
Geologists use GPS because plate motion is too slow to be seen with our eyes. Plates move only 1–10 cm per year.
Technology: Satellites detect minuscule millimeter-scale ground displacement over months and years.
Verified Benchmark Key Card #15
Benchmark Key #18 • ANSWER
Correct Answer
Melt, Then Cool and Harden
Rocks will melt into molten rock (magma or lava) and then cool and harden into solid crystalline rock.
Igneous Roots: "Ignis" is Latin for fire. Formed from cooled magma (intrusive) or lava (extrusive).
Verified Benchmark Key Card #18
Benchmark Key #17 • ANSWER
Correct Answer
Weathering, Erosion, Compaction & Cementation
Weathering and erosion break rock down into sediment, and then sediments get compacted and cemented together.
4-Step Sequence: Weathering → Erosion → Compaction (pressing) → Cementation (mineral gluing).
Verified Benchmark Key Card #17
Cards 13–18 (Reverse Answer Side) • Perfectly aligns with Page 5 when printed 2-sided Duplex Sheet 3 (Side B)
Front • Questions
Rock Cycle, Fossils & Superposition
Print 2-Sided (Flip on Long Edge) Page 7 of 8
Rock Formation #19 • FRONT
Metamorphic Rock
How does Metamorphic rock form from pre-existing rock?
Think About: Deep underground forces that alter rock texture without melting it into liquid magma.
Q1 Benchmark Review Answer on Back
Energy & Cycle #20 • FRONT
Two Energy Sources
What are the 2 energy sources involved in the rock cycle? Name each source and the type of rock it forms.
• Energy Source 1 (External) → Rock Type?
• Energy Source 2 (Internal) → Rock Type?
Q1 Benchmark Review Answer on Back
Sediments & Weather #21 • FRONT
Benchmark Question
How are sediments formed (don't forget to include the role of energy sources)?
Connection: How does solar radiation create the physical forces that break down mountains?
Q1 Benchmark Review Answer on Back
Rock Pathways #22 • FRONT
Yes or No & Explain
Can each type of rock be turned into ANY other type of rock? Explain your answer.
Think About: Is the rock cycle a single, one-way circle, or an interconnected web of transformations?
Q1 Benchmark Review Answer on Back
Fossils & Transformation #23 • FRONT
Two-Part Question
1. What type of rock contains fossils? (Igneous, Sedimentary, or Metamorphic?)
2. What must happen to an igneous rock to transform into metamorphic?
Bonus: What must happen to sediment to become sedimentary rock?
Q1 Benchmark Review Answer on Back
Relative Dating #24 • FRONT
Law of Superposition
In stacked undisturbed rock layers with fossils A (top layer 1), B (layer 2), C (layer 3), and D (bottom layer 4):
Which is the oldest fossil and how do you know?
Layer 1: A Layer 2: B Layer 3: C Layer 4: D
Q1 Benchmark Review Answer on Back
Cards 19–24 (Front Side) • Cut along solid borders after printing Duplex Sheet 4 (Side A)
Back • Answers
Benchmark Answer Key (Mirrored)
Reverse side of Sheet 4 Page 8 of 8
Benchmark Key #20 • ANSWER
Correct Answer
Sun & Earth's Core
- • The Sun's energy: Causes weather → weathering creates sediments → Sedimentary rocks.
- • The Earth's core: Internal heat melts rocks → cooling creates Igneous rocks.
Energy Source Match: External Solar = Sedimentary; Internal Geothermal = Igneous & Metamorphic.
Verified Benchmark Key Card #20
Benchmark Key #19 • ANSWER
Correct Answer
Heat and Pressure
Pre-existing rocks will go through heat and pressure deep underground, which reorganizes their mineral structures into banded or non-banded metamorphic rock.
Critical Boundary: If the rock completely melts into liquid, it becomes magma → which cools into Igneous rock!
Verified Benchmark Key Card #19
Benchmark Key #22 • ANSWER
Correct Answer & Explanation
YES (Any Rock → Any Rock)
Explanation: All types of rocks can become any other types of rock. There is not just one path that rocks can change into.
Rock Cycle Concept: Any rock can melt, weather into sediment, or experience heat and pressure at any time!
Verified Benchmark Key Card #22
Benchmark Key #21 • ANSWER
Correct Answer
Sun's Energy Creates Weathering
The sun's energy will create weather (wind, rain, temperature swings) and surface rocks will go through weathering to break down into sediments.
Benchmark Key Sentence: "The sun's energy will create weather and rocks will go through weathering to become sediments."
Verified Benchmark Key Card #21
Benchmark Key #24 • ANSWER
Oldest Fossil & Reason
D is Oldest (It is on the Bottom)
D is the oldest fossil, and I know because it is on the bottom. (Law of Superposition states oldest layers are deposited first at the bottom).
Relative Age Sequence: Layer 4 (D, oldest) → Layer 3 (C) → Layer 2 (B) → Layer 1 (A, youngest).
Verified Benchmark Key Card #24
Benchmark Key #23 • ANSWER
Correct Answers
Sedimentary & Heat / Pressure
- • Fossils found in: Sedimentary rock (magma incinerates them; metamorphism crushes them).
- • Igneous → Metamorphic: Must go through heat/pressure.
- • Sediment → Sedimentary: Must go through compaction/cementation.
Benchmark Essential: Sedimentary rock is the only rock type that preserves identifiable fossils!
Verified Benchmark Key Card #23
Cards 19–24 (Reverse Answer Side) • Perfectly aligns with Page 7 when printed 2-sided Duplex Sheet 4 (Side B)
