How many active volcanoes are there on Earth?
A. between 500 - 1,500
B. less than 500
C. more than 1,500
Answer: C
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Religions differ in the attitudes that their teachings advocate toward women and
A) national laws often reflect those teachings. B) women are granted more freedoms as a result. C) increase availability of contraception. D) approve the ordination of women.
This is the first observable step in the development of a supercell tornado:
A) increased wind speed. B) formation of a wall cloud. C) slow horizontal rotation of a large part of the cloud. D) formation of a funnel.
Which is a characteristic of shifting cultivation?
A) Land is cleared by tractors or large work crews. B) Debris is mulched to provide the soil with nutrients. C) A new site is designated every 50 years. D) Swiddens not under cultivation are used for mining operations. E) A new site is designated every few years.
Which of the following alcohols has the lowest boiling point?
A) 1-pentanol B) 1-octanol C) 1-hexanol D) 1-heptanol