Earth's Climate History

What most likely caused the ice ages? the size of tree rings and the amount of pollen grains solar flares and gassy ejections from the Sun the tilt of the Earth's axis and the shape of its orbit the temperatures of the Sun and moon

not a

In what type of climate do trees produce narrower rings? cool and dry warm and wet cool and wet warm and dry

not b

What is one cause of long-lasting climate change? volcanic activity Earth's elliptical orbit Earth's rotation the Sun's elliptical orbit

not c

Pollen grains help scientists identify plants and make assumptions on past climate conditions. understand tree growth and make assumptions on past climate conditions. understand how Earth was shaped and make assumptions on past climate conditions. identify major ice ages and make assumptions on past climate conditions.

a

What is a fossil? the remains of an animal or plant preserved within a layer of rock a large body of compacted ice formed over thousands of years the energy radiated from the Sun a change in the structure of Earth's surface

a

What is the relationship between Earth's temperature and the number of sunspots that occur? An increased number of sunspots causes an increase in Earth's temperature. A decreased number of sunspots causes an increase in Earth's temperature. An increased number of sunspots causes Earth's temperature to remain constant. A decreased number of sunspots causes Earth's temperature to remain constant.

a

What should scientists consider when studying tree rings to understand the variations in the local climate? patterns in their width, their density, and their composition odor from the wood, patterns in their width, and their density their composition, odor from the wood, and patterns in their width their density, composition, and location

a

Which factors of Earth's position would contribute to long-term climate change? its elliptical orbit and the tilt on its axis its distance from other planets and the tilt on its axis the tilt on its axis and its distance from the moon its distance from the moon and its elliptical orbit

a

What do glaciers deposit that helps scientists study ancient climates? plants that produce pollen grains rocks formed from lava sediment that contains fossils animals that migrate

c

Which played a major role in altering wind patterns and ocean currents? volcanic eruptions ice ages movement of continents solar flares

c