Which tools do meteorologists use to collect data about the weather? Select three options.
satellites
weather fronts
maps and charts
weather balloons
automated weather stations

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

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The activity of the modern sample is 1.10 bq . how long does that measurement take?