What is the likely source of methane in Mars atmosphere?
A) Mars landings of exploration vehicles such as Spirit
B) ongoing volcanic activity
C) the decomposition of the residue deposits left from Mars oceans
D) the absorption of Phobos' (Mars' larger, inner moon) methane atmosphere through gravitation
B
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Which of the following is the strongest?
A. an induced dipole-induced dipole attraction B. a chemical bond C. an ion-dipole attraction D. a dipole-induced dipole attraction E. a dipole-dipole attraction
All of the following crops are commonly grown in plantation agriculture except
a. Corn b. Bananas c. palm oil d. Coffee e. Sugarcane
Ethiopia and Kenya have dominated in which sport?
A) basketball B) long-distance running C) soccer D) rowing E) short-distance sprinting
Which of the following is a domain of living things?
a. Monera b. Plantae c. Bacteria d. Animalia e. Chordata