Show:
Astronomy
Astronomy
Astronomy
Geology
Geology
100
A day on Saturn takes about 10 Earth hours. Which fact would best explain this short day?
Saturn is much farther from the Sun than Earth.
100
A student models an impact crater on the Moon by dropping a marble from a known height onto a pan of smooth flour. Before reaching any conclusions about the results of this simple experiment, the student repeats the activity several times so that
differences produced by standard variability in conditions become clear.
100
How are the planets of the solar system formed?
They formed from a nebular cloud of dust and gas.
100
In an area where a river has cut deep into Earth, there are several layers of very different rock exposed. The oldest rock layer is most likely to be the layer that is
below the other layers.
100
Evidence suggests that Earth is about 4.6 billion years old, even though no Earth rocks have been found that can be dated at more than 4 billion years old. This discrepancy is most likely caused by Earth’s original crust being
subject to extensive erosion.
200
Which planet was formed from the light gases of the outer solar nebula? A) Mars B) Mercury C) Venus D) Uranus
Uranus
200
What is the source of energy for the Sun?
Hydrogen fusion
200
Early telescopes showed stars as only points of light, while the planets appeared to be much larger, providing evidence that stars must
be much farther from Earth than planets.
200
What is the best evidence that Earth’s continents were once in vastly different positions than they are today?
Fossils of tropical plants are found in Antarctica.
200
Cracks in rocks widen as water in them freezes and thaws. How does this affect the surface of the Earth?
It exposes rocks to increased rates of erosion and weathering.
300
Fusion is a form of nuclear reaction resulting in an enormous release of heat energy. The fusion of hydrogen to helium is a reaction that commonly occurs in
They do not maintain fixed positions relative to other planets or stars.
300
The surfaces of planet Mercury and our moon contain some very large craters that are most likely the result of
asteroid impacts
300
As part of the modern theory of the origins of the elements, it is hypothesized that before the formation of the stars, most of the matter in the universe consisted of what atoms?
hydrogen and helium
300
How can urbanization affect a local area?
It can increase the risk of flooding in an area.
400
Stars begin their life cycle in
nebula
400
The clouds that surround Venus are so thick that the planet actually absorbs less sunlight than the Earth. Nevertheless, Venus has a surface temperature of more than 400οC. Which of these best explains this high surface temperature?
The thick clouds in the atmosphere prevent heat from escaping.
400
What natural phenomenon occurs as a result of Earth rotating on its axis?
day and night
400
What is a farming technique that could improve the soil and the environment?
creating undisturbed layers of mulch in the soil
400
Subsurface ocean currents continually circulate from the warm waters near the equator to the colder waters in other parts of the world. What is the main cause of these currents?
differences in density of ocean water
500
A community decides to upgrade its water purification and management systems. What lasting impact could this have on available freshwater?
It could cause an increase in the freshwater supply.
500
What storm most likely develops as air masses interact with the warm water in the northwest Pacific Ocean?
typhoon
500
Which is associated with an increase of chlorofluorocarbons in the environment?
an increase in health risks associated with UV radiation
500
What is most responsible for the presence of groundwater in an area?
the movement of surface water and precipitation through soil and rock
500
Which is the most common contamination source for freshwater resources?
runoff