The two major groups of dinosaurs during the Jurassic Period were the saurischians and the

A) pterosaurs.

B) ichthyosaurs.

C) ornithischians.

D) herbivores.

How many grams are there in 457.25 pounds?

Identify each statement as true or false. Explain in every case. a. Ionization energies are always negative quantities. b. Oxygen has a larger first ionization energy than F. c.

The difference in elevation between the highest and lowest contour lines on a topographical map is called: a. contour interval c. relief interval b. relief d. contour index

Ken wrote a few steps to describe how carbon circulates between the atmosphere and living organisms. Step 1 is missing.

Rank the metals from most reactive to least reactive 1. Silver 2. strontium 3. technetium

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.