Ana studied a diagram of the geologic timeline to complete her homework assignment She became curious about the different divisions that formed the sections of an era. What is the name for the groups into which eras are divided?
Mesozoic Era
Triassic
Jurassic
Cretaceous
Began
(Millions of
years ago)
252
201
145
Duration
(Millions of
years ago)
51
56
79
sections
B. periods
o o o o
C. divisions
D
Precambrian

Can you reduce your impairment by drinking coffee or cold showers? true or false?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

How can parts of a solution be separated by chromatography?