Answer:
C. Varieties of an element that differ only in the number of neutrons are called isotopes.
Explanation:
The Earth is approximately 
old. The solar system formed from giant gas clouds which was a part of the solar nebula.
The surface of soil which demarcates two soils of different geological ages is called a unconformity.
Palesol is the soil that lies between sediments or volcanic deposits. If the paleosol is older they have lithified rock.
Hence, option C is true.
Answer:
Catalhoyuk's economy was based mainly on farming. Uruk's, in contrast, was much more complex and based on both farming and trade. Workshops produced all sorts of goods, which were sold in shops on the streets. Also, Uruk merchants traveled far and wide, selling their products.
Explanation:
Answer: A. 1
Explanation:
This is about the Portuguese explorer Ferdinand Magellan who attempted to find a western route to Asia from Spain. The expedition ran into a lot of problems and almost ended when Magellan himself died in battle whilst fighting natives.
The leadership of the expedition was then taken over by Juan Sebastián Elcano after several others failed to lead effectively and under him, the expedition eventually made it back to Spain with only one ship remaining of the fleet of 5 that had gone out.
Yes, traveling in groups of two or more affects the independence assumption.
The probability that the whole group shows up is 0.8 and that the group does not show up is 0.2.
Answer: You have the advantage to fold laundry and cook a meal faster than your roommate because you can fold in 2 hours and prepare a meal in 1 hour, which is 3 hours in total. However, your roommate can fold laundry in 3 hours and cook a meal in 1 hour which is 4 hours in total. So you have an advantage because you take 1 hour less than your roommate.
