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The footprint of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossil?

A wooden block has a volume of 25.3 cm3. Its mass is 17.0g. What is the density of this block?

How long will it take for half of Bismuth-214 to decay to lead? (Refer to the Uranium-238 decay chain series.) 5 min 13 min 20 min 27 min

The electron affinity of an atom typically depends on the A. mass of the atom's nucleus. B. number of electrons already present in the atom. C. number of neutrons in the nucleus of the atom. D. availability of an unfilled orbital in the atom.

Which of the following correctly describes how metals behave in an ionic bond? Metals lose their valence electrons and form positive ions. Metals lose their valence electrons and form negative ions.

A pharmacist measures the mass of a powdered drug. The mass is 506 mg. What is the mass in grams? Write your answer as a decimal.

Which of these is a source of sediment? A. Fragments if other rocks B. Chemicals and minerals dissolved in water C. Sea shells D. All of the above

Entropy is greater at higher trophic levels than at lower levels ... True of False

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.