What is the difference between intrusive and extrusive igneous rocks?
What will be an ideal response?
Answer: Intrusive igneous rocks form below Earth's surface. Common intrusive rock formations are called plutons and include sills, dikes, batholiths, and laccoliths. Intrusive rocks are often referred to as plutonic rocks. Extrusive igneous rocks form at or very near Earth's surface. Common extrusive rock formations include volcanoes and fissure eruptions. Extrusive igneous rocks are often referred to as volcanic rocks.
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A bicyclist starts down a hill with an initial speed of 2.0 m/s. She moves down the hill with a constant acceleration, arriving at the bottom of the hill with a speed of 8.0 m/s. If the hill is 12 m long, how long did it take the bicyclist to travel down the hill?
The ignition of helium in the core of a star changes the structure of the star. The star now makes energy in two locations by two different processes, _____
A) carbon fusion in the core and helium fusion in the surrounding shell B) helium fusion in the core and nitrogen fusion in the surrounding shell C) helium fusion in the core and hydrogen fusion in the surrounding shell D) nitrogen fusion in the core and helium fusion in the surrounding shell
An F-type star would have a larger habitable zone than does our Sun
Indicate whether the statement is true or false
How long does it take the Earth to complete one orbit around the Sun?
A) one month B) one year C) one day D) one week E) The time it takes Earth to orbit the Sun changes significantly from one orbit to the next.