Questions and Answers
What observation would lend support to the conclusion that a very bright star in the sky might be the planet Venus?
After a month, its position relative to the Earth changes insignificantly.
What approximate amount of the element remains after 3 half-lives have elapsed?
Which of the following probably did not contribute to the decline in populations of the order Catacea?
What is the reason the mountain shown is still increasing in elevation?
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Which city sits on exposed bedrock that is the same age as the rock in Bristol?
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Why will a boat float higher in the Atlantic Ocean than in the Potomac River?
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What does the area immediately below a water table describe?
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What do these minerals have in common?
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How would Jupiter and its moons appear on February 7 as seen through a telescope?
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Which type of rock appears to be the most easily eroded by the river in this area?
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What season takes place in the Southern Hemisphere when the Earth is at its greatest distance from the sun and its Northern Hemisphere is tilted toward the sun?
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Which layer of the soil profile would be affected the most by weathering and erosion?
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Which planet is often called 'Earth's twin' due to its similar mass and diameter?
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Dramatic variations in the polar ice caps most likely suggest changes in what?
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Which location has the oldest exposed bedrock in Virginia?
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Which image below best represents our galaxy?
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Based on the charts above, which is a valid conclusion about meteorites?
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Why does ground fog form in the low areas near the Shenandoah River on clear nights in late summer and early fall?
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Which property refers to the colored powder resulting from rubbing a mineral against a harder surface?
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Which of the following rocks represents an igneous intrusion?
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Why do stars appear to change position during the night?
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How much limestone was worn away between Day 1 and Day 2?
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What is the major disadvantage of using solar panels to generate electricity?
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What is a possible cause of the destruction of ozone in the upper atmosphere?
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When viewed from the Equator, what happens to the pole star, Polaris?
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At what point will the trail be the steepest?
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What is one of the main pollution problems associated with sinkholes?
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What best describes the area shown in this aerial photograph?
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What would explain the change in the direction of air movement from daytime to night?
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Study Notes
Celestial Observations
- A bright star thought to be Venus can be confirmed if its position changes relative to other stars over time.
Radioactive Decay
- After three half-lives, approximately 12.5% of a radioactive isotope remains.
Marine Conservation
- Declines in the populations of whales, dolphins, and porpoises (order Catacea) are linked to factors excluding the greenhouse effect.
Geological Activity
- Mountain ranges near tectonic plate boundaries experience increased elevation due to colliding tectonic plates.
Geological Ages
- Harrisonburg, Virginia is situated on exposed bedrock that matches the age of the bedrock in Bristol.
Density of Water
- Ocean water has a greater density than river water, causing boats to float higher in the Atlantic than in the Potomac River.
Groundwater Zone
- The zone immediately below the water table is termed the zone of saturation.
Mineral Composition
- Certain minerals can be grouped together due to their common feature of containing an oxygen ion.
Planetary Observations
- In early February 1996, Jupiter's visible moons included Ganymede, Europa, Io, and Callisto.
Erosion Resistance
- Sandstone is the rock type most easily eroded by river activity in the specified area.
Seasonal Changes
- When Earth is farthest from the sun and the Northern Hemisphere tilts towards the sun, it is summer in the Northern Hemisphere and winter in the Southern Hemisphere.
Soil Weathering
- The top layer of the soil profile is most affected by weathering and erosion.
Earth's Twin
- Venus is often referred to as "Earth's twin" due to its similar mass and diameter.
Climate Indicators
- Dramatic variations in polar ice caps indicate changes in Earth's climate.
Geological Mapping
- Hightown Valley has the oldest exposed bedrock among the locations indicated on the map of Virginia.
Galaxy Appearance
- A shuriken-like shape is often used to represent our galaxy.
Meteorite Composition
- Charts show that achondrites contain a greater amount of feldspar compared to chondrites.
Ground Fog Formation
- Ground fog in the Shenandoah Valley forms when cool, descending air interacts with moist air in low areas near the river.
Mineral Properties
- The property called "streak" refers to the colored powder produced when a mineral is rubbed against a harder surface.
Igneous Intrusion
- Granite is an example of an igneous intrusion among rock types.
Stellar Movement
- Stars appear to change position overnight due to Earth's rotation on its axis.
Limestone Erosion Measurement
- Limestone erosion measured between Day 1 and Day 2 amounted to 0.2 grams.
Solar Energy Limitations
- Solar panels face efficiency issues related to cloud coverage and varying day lengths.
Environmental Concerns
- The release of chlorofluorocarbons (CFCs) is linked to the destruction of ozone in the upper atmosphere.
Observing Polaris
- From the North Pole, Polaris is overhead; from the equator, it appears on the horizon.
Trail Steepness
- The steepest point of a trail is marked as point X.
Sinkhole Pollution Issues
- Sinkholes pose pollution risks as they can create direct connections to the water table.
Aerial Geography
- The area depicted in the aerial photograph shows a mix of forest and farmland.
Air Movement Changes
- Shifts in air movement from day to night can be explained by changes in land temperature.
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Description
Test your knowledge of Earth science concepts with these flashcards. This quiz covers topics such as celestial observations, radioactive decay, and marine life classification. Perfect for students looking to reinforce their understanding of key scientific principles.
