flashcards

what is the crack in the ocean floor through magma rises?

According to wegener, what happen about 250 million years ago?

tectonic plates are blocks of

at the center of a mid-ocean ridge is a(n)

The composition of Earth's interior affects

Which scale more accurately measures the magnitude of large earthquakes?

If you are in a car during an earthquake, you should

what happens to tsunamis as they move toward shore?

If you are indoors during an earthquake, you should

Which of the following is NOT a cause of tsunamis?

If you ars indoors during an earthquake, you should

How does the structure of Earth' s interior affect seismic waves?

Which of the following are studied to forecast earthquakes?

Why do earthquakes usually occur at plate baundaries?

S waves are also known as

Fault zones form at plate boundaries because

What forms on the ocean floor in a subduction zone?

Volcanic eruptions rnay be signaled by

A large depression formed by the collapse of a volcanic cone is called a

Volcanic ash, dust, blocks, bombs, and lapilli ara all

The eruption of Mount St. Helens was

Three events that might signal a volcanic eruption aro rhanges in earthquake activity, volcano surface bulges, and

Modern oceanography began with

Most mid-ocean ridges form

A piece of sediment collected by drilling is a(n)

The most common compounds in organic sediments are

To calculate the depth of the ocean floor with sonar, scientists measure

The source of most calcium carbonate in biogenic sediment is

Most oxygen enters the ocean from

What is called the foundation of life in the ocean?

The ocean is the main source of the trace minerals

Most offshore oil and petroleum deposits are found

In addition to increased use of toxic chemicals, what has reduced the ocean's ability to renew itself

In addition to limitng the use of leaded gasoline, what has the United States done to reduce ocean pollution?

Trace elements in the ooean are those minerals that are

Volcanic eruptions, chemical weathering of rock on land, ffid chemic,al rcactions between sea water and newly formed searfloor rocks providemost of the raw elements that form this dissolved solid in the ocsan.

Where would a tidal bore occur?

The curving of the path of ocean currents and wind belts is called

The force that causes tides is

Very large waves are usually the result of

In the tropical latitudes, trade-wind belts push currents

Sandbars are formed by

As lower layers of air are warmed,

what air massss generally move eastward, toward Europe?

A large body of air throughout which temperature and moisture content arc similar is a(n)

Continental polar, maritime polar, continental tropical, andmaritime tropical are types of

Doppler radar and satellite images provide information to create

A pattern of meteorological symbols that represent the weather at a particular observing station is a

When air movss slowly, in takes on the temperrture and humidity of its region, becoming a(n)

Lines that, connect points of equal temperature on a weather map are called

An air mass that originates in the Pacific or Atlantic Ocean and brings warm, moist air is called

What weather effsct results when a moving air mass hits a mountain, rises, cools, and loses most of its moisture through precipftrtion?

which of these climates is characterized by dense, lush vegetation; broadleaf plants ; and high biodiversity?

Climate does NOT change as a result of

Which of the following is NOT an impact of climate change?

The average weather conditions for an area over a long period of time is referred to as the area's

Tree rings have been used to measure

What is the name for the climate of a small area?

Which of the following rnay decrease temperatures by reflecting sunlight back into space?

When an air mass encounters a mountain range, the air mass

What do high levels of carbon dioxide in an ice core indicate?

Computer climate models that incorporate millions of pieces of data and help sort complex sets of variables &re called

What do fossils of flower pollen and plants with broad leaves indicate?

What characteristic do the tropical savanna, and tropical rain-forest climates share?

Which climate zone has an annual rainfall of less than 25 cm?

Specific heat is the amount of energy needed to change the temperature of 1 g of substance by

A telescope tha tuses a set of lenses to gather and focus light from distant objects is a

A constellation's change in position over several hours is caused by

The Northern Hemisphere has the most hours of daylight at the

A light -yeat equals

Invisible electromagnetic radiation was discovercd with a

One line of evidence of Earth's revolution around the sun is

What problem is solved by sending telescopes into space?

About 99% of all matter contained in the solar nebula now exists in

The two inner planets most alike in size, mass, and density are

The early atmosphere developed when many volcanic eruptions released large amounts of gases rn a process called

A rotating cloud of gas and dust from which Earth's solar system formed is called a(n)

Uranus's axis

When fast-moving planets pass slow-moving planets in their orbits, why does it appear as though planets that orbit more slowly than Earth are moving backward?

The asteroid belt can be found between which two planets?

Small bodies from which planets ongrnated during the early formation of the solar system are called

An engineer examining photos discovered volcanoes on

Many comets in the Kuiper belt are the result of

Characteristics of Ganymede and Callisto are, respectively,

Where is the Kuiper belt located?

Most of the sun's energy is a result of

Auroras ars frequently seen

Which of the following is NOT a solar ejection?

Sunspots vary in a cycle that lasts about

Einstein's equation E = mc2 helps scientists understerd the sun's energy because the equation

Scientists break up the sun's light rrto a spectrum using a device called a

Magnetic fields on the sun are produced by the sun's uneven rotation and

Hcw long would a star with the sun's mass stay on the main sequence?

After its temperature rises to 10,000,000"C, a protostar becomes a star when

What is a quasar?

What is apparent magnitude?

An elliptical galaxy

Astronomers believe that cosmic background radratron formed

The big bang occurred about

The temperature of cosmic background radiation is