Is a crumbled piece of paper weight, mass, density or appearance changed? I think density.

Why is it important for a measurement system to have an international standard for each unit?

What do engineers use to test their designs of new technologies? A. polls B. models C. pie charts D. reference materials

Analysis: Marble is made from limestone under the influence of heat and pressure. The chemical formula for limestone or marble chips is CaCO3. When you added the chips to the acid solutions, they effervesced (bubble or foam). 1.

The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L? Use PV = P2V2.

Name an element in the third period (row) of the periodic table with one valence electron.

What type of change is a substance that changes form but remains the same?

Which side of the mountain experiences high temperature in windward or leeward

How does light pollution affect plants and animals? Light pollution harms plants and animals because they confuse it with

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.