Why can the moon eclipse the sun on occasion? (Select all that apply) Sometimes they line up in a straight line.
When the sun is furthest from the Earth it is small enough to be eclipsed.
The moon and sun both have an angular diameter of ½ degree.
The moon appears about the same size as the sun.

Plants in the tundra biomes have had to adapt to live long periods of time without a. cool temperatures b. sunlight c. oxygen d. water

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.

In plate tectonics, why is the north american plate tectonically inactive?