What is the basic building block of all matter

What or the two ends of a magnet called

According to the nebular model, how were planets formed?

If you put a pencil in a cup of water, it looks as if it is bent and larger in the water. This is because waves A) can reflect off the surface. B) are absorbed instead of reflected. C) bend around a barrier, like light does.

When an acid is dissolved in water (H2O), what element separates from the acid to bond with water to create H3O+? 1. Cl 2. Na 3. H 4. O

A 50-kg student gets in a 1000-kg elevator at rest. As the elevator begins to move, she has an apparent weight of 600 N for the first 3 s. How far has the elevator moved, and in which direction, at the end of 3 s?

The half-life of carbon-14 is 5730 years. How long will it take for the number of carbon-14 nuclei in a sample to drop to a quarter of the original number? Enter your answer as a number years

Which object has more thermal energy a bowl of soup or pot of soup

When you look into a clear pond, a fish may appear to be in a different position than it actually is. What is this caused by? A. diffraction B. dispersion C. refraction D. reflection,

How long would it take to drive to alpha centauri (4.4 light-years away) ?

A type of fault where the hanging wall slides upward