Which of the below are examples of direct climate evidence? Select one or more:
a. temperature and precipitation data from tree rings
b. temperature data from weather baloons
temperature measurements from weather balloons
c. Ocean surface temperature data from satellites
d. deep ocean data taken by probes or submarines
e. Weather data from weather stations
f. ice and snow cover on glaciers and at the poles
g. data from bubbles in ice cores
h. data from layers of deep lake sediments

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.