Which example is a naturally occurring magnet

A a nail

B a piece of iron

C aluminum

D earth

The biosphere is the highest level of organization in the hierarchy of life on earth. Rank the levels of organization from most complex to simplest.

Rank the measurements in order of increasing pressure. 4 kPa, 16 N/m2, 311 N/m2, 0.3 Pa 16 N/m2, 311 N/m2, 0.3 Pa, 4 kPa 4 kPa, 16 N/m2, 311 N/m2, 0.3 Pa 4 kPa, 311 N/m2, 16 N/m2, 0.3 Pa 0.3 Pa, 16 N/m2, 311 N/m2, 4 kPa

Extremely high temperatures and pressures are necessary for fusion reactions to take place in stars. true or false.

The valence of an element or radical is A. less than the number of positive or negative charges on the ion. B. greater than the number of positive or negative charges on the ion. C. equal to the number of positive or negative charges on the ion. D.

Joshua is about to start a conversation with someone he has a crush on. He's not sure how it will go. Which of the following might Joshua experience?

If the mass of an object is 84g and the volume is 12cm3 what is the density

Describe one example of competiton of tropical dry forest

What is the center of a tornado called A. the eye B. The center C. The middle road D. The vortex

Is it legal in Florida for a math teacher forces the kids to do push ups?

Acceleration is best defined as the rate of change of blank of an object