Carlos cena con su familia a las 8:00 p.m. Si cenan durante una hora y luego ven televisión durante otra media hora y después se van a dormir, ¿a qué hora se irá a dormir Carlos?

1. Can you think of some ways that you use energy everyday? 2. Can you think of a time when you've had both potential and kinetic energy? How could you have more of each type? 3. Are there any words you know that sound similar to any of the vocabulary in the reading? How do the meanings of those words compare to these?

9. Consider the daily life of an Ancient Indian using the numeral system described in the Bakhshali Manuscript. How might these numerals be used in trade or other practical applications?

If you're in traffic, what must you be certain of when crossing railroad tracks? a) That you can clear the tracks with at least two car lengths to ensure you don't get stuck over the tracks b) That you can clear the tracks with at least one car length to ensure you don't get stuck over the tracks c) That you can clear the tracks with at least four car lengths to ensure you don't get stuck over the tracks

Why should you wait instead of starting to move forward when the gates start moving up? a) Your car could stall b) You could hit the gates d) You could get rear-ended d) There could be another train coming

What is an unprotected railroad crossing? a) A railroad crossing without a fence surrounding it b) A railroad crossing without flashing lights or barricades c) A railroad crossing with flashing lights or barricades d) Stopping on top of the railroad tracks