Scientists collected this pollution data before, during and after a volcanic eruption. Pollution data are measured in particles per liter and is shown on the graph below. When did the eruption occur?

Between days 3 and 4
Between days 3 and 4

Between days 5 and 6
Between days 5 and 6

Between days 10 and 11
Between days 10 and 11

Between days 14 and 15

Why do you need to classify the size of a particle

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.

Cartels control the production and pricing of goods mainly through a) the elimination of competition. b) the cooperation of their members. c) the limitation of price controls. d) the manipulation of government pressure.