20 questions
What probably caused the patterns in this rock?
Flowing water or wind deposits
Alternating lava and volcanic ash deposits
Evaporating salt water
Avalanches of soil and rock
A group of students wants to make a map of a small lake, showing its depth at various points. They plan to row their boat all around the lake and measure the depth at different locations. What other information besides depth should they record at each location in order to have enough data for constructing the map?
The tempemture at the surface of the water at each location The position of each depth measurement relative to fixed points on the shore
The time of day the depth was measured at each location
The relative humidity at each location
The accumulated salts in seawater make the seawater much more dense than fresh water
One of the characteristics of salt water is that it has
higher levels Of dissolved oxygen than fresh water
a lower freezing point than fresh water
decrease buoyance for swimmers
ninety elements that are easily extracted from seawater
Moist air from the Pacific Ocean rises and cools as it passes from west to east over the Sierra Nevada Mountains. Once it is over the mountain range, the air descends and warms on the other side. What is the result of the air ascending, then descending over the mountains?
Desert on the west side of the mountains and heavy rains on the east side
Heavy rains on the west side of the mountains and deserts on the east side
Heavy rains on the west side of the mountains and year-round snow on the east side
Desert on the east side and west sides of the mountains and heavy rains on top of the mountains
How are stars distributed in space?
Evenly distributed in space with no significant clumping
In clumps that are evenly distributed in space, with scattered stars in between
In clumps that are themselves evenly distributed in space
In clumps that are themselves unevenly distributed in space
The folding and faulting found in the rocks of the Blue Ridge Mountains of Virginia were created by -
collisions of continental plates
wave action of prehistoric ocean
the Coriolis effect
heating and cooling of the prehistoric atmosphere
Which type of rock appears to be the most easily eroded by the river in this area?
Limestone
Shale
Basalt
Sandstone
Because granite cools below the surface of the Earth, it is -
an igneous extrusive rock
an igneous intrusive rock
a sedimentary rock
a metamorphic rock
In karst regions, caves are carved by the flow of water through limestone bedrock. How do the stalagmites and stalactites in the caves develop?
They are carbonate deposits formed by dropping water in air-filled cavities.
They are granite intrusions that remain behind after water dissolves the surrounding limestone.
They are crystals that grow as water hollows out the cavern.
They are carvings made in limestone by the swirling water as it hollows out the cavern.
The label L indicates an area of low -
temperatures
pressure
altitude
rainfall
Which body in the solar system has an orbit so eccentric that it crosses the orbit of neptune?
Mars
Mercury
Jupiter
Pluto
A student hypothesizes that water from infrequently used school faucets contains more chemical impurities than the water from frequently used faucets. At the same time of day, the student uses a water test kit to measure the water impurities from the different faucets. Which is the manipulated variable in this investigation?
The chemicals used to test the water
The amount of water per sample
The time of day when water is collected
The locations of water collection
Wetlands are more prevalent in which physiographic province of Virginia?
Coastal Plain
Piedmont
Blue Ridge
Appalachian Plateau
In the first picture, the sphere is in a beaker with 100 mL of water. In the second picture, the dry sphere is being massed. Which of the values listed is closest to the density of the black sphere?
0.5 g/mL
0.7 g/mL
1.4 g/mL
2.1 g/mL
What process has occurred when atoms combine to form a new element and release energy?
Fusion
Fission
Hydrogenation
Ionization
The mineral in the above table that has a blue color and will scratch garnet is -
pyrite
garnet
magnetite
topaz
In order to protect aquifers near landfills, material is placed under the soil to prevent pollution. Which property must the protectvive material possess?
High porosity
Low permeability
High reflectivity
Low conductivity
At which range of altitude is air pressure closest to 40 kPa based on these data?
Between 4.5 km and 6.0 km
Between 6.0 km and 7.5 km
Between 7.5 km and 9.0 km
Between 9.0 km and 10.5 km
At star might be much brighter than it appears to be. This is called the star's absolute magnitude. The difference in apparent magnitude and absolute magnitude is due primarily to the star's -
surface temperature
motion through the universe
diameter
distance from earth
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Rock layers tell a story about their past. What is the basic assumption that is made when reading this story?
The composition of the Earth's atmosphere has been constant.
The Earth's crust cooled and then remelted before rock layers began to form.
The processes in the rock cycle were the same in the past as they are today.
Chemical reactions in the past were slower than they are today.
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