It is a hot summer day, and Miguel wants to cool off. He decides to make a root beer float. He pours root beer into a mug and adds a scoop of vanilla ice cream. What thermal energy transfer occurs? A. Thermal energy radiates out from the ice cream
B. Thermal energy moves from the ice cream to the root beer by convection
C. Thermal energy moves from the root beer to the ice cream by conduction
D. Thermal energy stays with root beer by induction

1of the following choices, which one best describes one way that christianity came to east africa? a. christians traveled in caravans through the sahara desert and introduced the people of mali to a new religion. b. christian traders from the mediterranean interacted with the people of axum. c. christian military from west africa traveled across the continent to bring their religion to the people of east africa. d. christian rulers from asia traveled to east africa to bring their religion to the people. 2 which trade item from outside the region did west africans need most? a. gold b. camels c. salt d. iron

Which factors slowed population growth in china until the 1300? a. one child policy. b. urbanization c. epidemics. d. warfare

What greek scientist created a screw to move water for irrigation?