The average salinity of sea water is

A. 3%

B. 3.5%

C. 2.5%

D. 2%

A meteor is A) a streak of light in the atmosphere. B) an icy body with a long tail extending from it. C) a chunk of space debris that has struck the ground. D) an irregularly shaped body, mostly found orbiting between Mars and Jupiter.

The primary reason professional observatories are built on the highest mountaintops is to (a) get away from city lights; (b) be above the rain clouds; (c) reduce atmospheric blurring; (d) improve chromatic aberration.

During which stage of prophase i does crossing over take place?

If you throw a ball horizontally while standing on roller skates, you roll backward with a momentum that matches that of the ball. Will you roll backward if you go through the motions of throwing the ball, but instead hold on to it? Explain.

5 characteristics of an Electromagnetic wave

Matthew rolls a bowling ball with a speed of 2 meters/second. The ball hits the pins with 1.8 joules of kinetic energy. The mass of the bowling ball is kilograms. NextReset

Many schools require freshmen to live

What do hydroelectric plants use to generate electrical energy?

The specific heat capacity of lead is 0.13 J/g-°C. How much heat (in J) is required to raise the temperature of of 91 g of lead from 22°C to 37°C?

What are some potential impacts to organisms during a global warming event?