Crossbeds and current ripple marks can both indicate the direction of a current. Explain how crossbeds and current
ripple marks differ and the types of environments you would expect to find them in. Fill in the blank(s) with the appropriate word(s).
Current ripple marks can be formed by wind or water and they are SMALL-scale features.
They are found in fluvial, desert, and tidal environments.
Crossbeds can also be formed by wind or water, however they are LARGER-scale features
found in fluvial, but mostly desert environments.
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The second phase of European expansion was external and also known as colonialism
Indicate whether this statement is true or false.
The opening of large fissures that swallow people is a significant source of danger created by
earthquakes. Indicate whether the statement is true or false.
The North Pole remains pointed towards the sun at all times, regardless of where the Earth is in its orbit
Indicate whether the statement is true or false
During a ________ year period starting at about 4.5 billion years ago, bits and pieces of metal-rich particles, rocks, and ices accumulated to form the Earth.
A. 10-300 billion B. 3-10 million C. 30-100 million D. 1-10 million