Chemical reactions cause changes in:

atoms

molecules

physical properties

A high pich always correspond to

By making several measurements with the same balance, a chemist obtained values of 5.224 g, 5.235 g, and 5.259 g for the mass of a sample. Without knowing the actual mass of the sample, we can tell that these measurements have.

If a particle has Z = 25 and 23 electrons, what is its charge?

Describe the 2 kinds of pure substance

What does the Kinetic Theory of Matter state that matter is composed of?

a 1kg rock is at a height of 100 meters. What is the rocks gravitational potential energy at 100 meters high

Why doesn't the stomach acid just digest right through the wall of the stomach? Select one: a. Neutralizers are imbedded in the stomach lining. b. The lining of the stomach is protected by mucus. c.

If a substance cannot be seperated physically or chemically, it is?

Match each type of sedimentary rock with its composition. 1. mineral crystals clastic sedimentary rock 2. remains of dead creatures organic sedimentary rock 3. weathered rock particles chemical sedimentary rock

A scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. Does this result support the theory of plate tectonics? Why or why not?