Which radioactive isotope is most often used when determining the age of fossil bones found in sediments deposited during the Holocene Epoch? 1. carbon-14 2. potassium-40 3. uranium-238 4. rubidium-87

2) Every year, people on Mt. Everest find new fossils that were not visible the year before. Some fossil fragments from other sea creatures are now visible that were not visible 100 years ago.What is causing new fossils to be exposed on Mt. Everest? __

7. Each square can then be divided into square . The most recent epoch of the Quaternary period, which is still going on today, is the square epoch.

What do theories hypothesize about the conditions of Earth's early atmosphere? Little to no oxygen Low levels of ultraviolet radiation Protective atmosphere Very cold temperatures

When reading a map explain where you would find latitude and longitude. square

What types of sedimentary rocks are formed from the remains of dead organisms? oxygenated clastic igneous chemical

11. Which of the following describes a mature river? a river that is wide and carries sediment such as pebbles and rocks a river that moves very slowly and only carries silt and clay a river that forms V-shaped valleys and creates a straight path with small curves a river that is surrounded by a large flat floodplain

If Earth was not spinning, there would be no __ A. seasonal cycle B. insolation C. diurnal cycle D. albedo

What do the San Joaquin River and the Friant-Kern Canal both have in common? Mark two answers. They both take water to farmers on the East Side of the San Joaquin Valley They both get their water from groundwater aquifers They both flow out of Friant Dam They both carry surface flow water

Why do humid tropical regions have only small variations in temperature throughout the year? The cloud cover and rain do not allow the temperatures to rise or fall significantly. The winds associated with these systems rapidly redistribute the heat. The location of this climatic region is limited to an area where the solar radiation does not vary significantly. The constant humidity maintains a relatively uniform temperature.

Hot Questions

72. Which eon occurred between 2.5 billion and 570 million years ago? Cambrian Hadean Archean Proterozoic

The solar altitude is the height of the __ Sun above the horizon at different latitudes. vertical noon setting summer winter

- ¿Cómo contribuyeron las diferentes dinastías a la cultura china? __

How many of the five climate types can be found in the US? A. one B. two C. four D. five Please select the best answer from the choices provided A B C D

Granite and gabbro __ have a similar mineral composition have a similar texture are similar in both texture and mineral composition are not similar in either texture or mineral composition

How long after the Earth was formed did it take to achieve the state we recognize now? About 500 millior years. About 1 billion years. About $10-20$ million years. About 100 million years.

Geologists use both color trends and texture to identify and name igneous rocks. True False

In what other specific ways might GPS be useful? Select all that apply. View Available Hint(s) Mapping areas where natural resources occur Recording mountain heights D Determining an exact location D Collecting satellite imagery Analyzing geographic data Charting the distance covered when walking your dog.

The spacing of what feature indicates how steep a slope is? a blue lines b v-shapes C contour intervals d contour lines

The section of highway called The Connector is found in what metropolitan area? 1) New York City 2) Atlanta 3) Washington D.C. 4) Los Angeles