Answer: 1
Explanation: 10-5-4
Use Order of operations left to right 10-5 is 5 and 5-4 is 1
A. at the same time that Earth formed
Explanation:
Geologists think the earth's continents began to form about the same time the earth was formed.
Most of the rocks on the continental crust are about the oldest that been used to date the age of our planet.
- Oceanic plates are relatively very young as they are formed at spreading centers and destroyed at convergent margins.
- Continental masses have very high absolute ages.
- The oldest rock on earth such as the Kabala Gneiss have been dated to be about 3 billion years.
- Other rocks have yielded ages close to the formation of the earth.
- We can conclude that the continents began to form immediately after the earth was formed.
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Community based tourism helps local communities that is they look after their well-being. Sustainable tourism means visiting to a particular place and making a positive impact on the society,economy and environment.
Explanation:
Community based tourism is more effective than sustainable tourism because in case of community based tourism , many financial as well as non financial helps are provided to communities residing locally.It makes the environment sustainable that is community based tourism as well as ecotourism can move hand in hand.It helps in empowerment that is develops income facilities for the local people.Helps in gaining authentic experiences.
For example in case of Atacama Desert Tour the tourist stays in the desert with that community of people who are staying in the desert. Tourists come to know regarding their cultures as well as habits.
The two most common minerals located in Earth's crust are B) Feldspar and quartz
(Earth Science- Geology, the Environment, and the Universe book)
