Carbon is black, crystalline and hard. Oxygen alone is a gas. How does the substance that is formed when these two elements combine differ from carbon?

Proposing an explanation for the changing colors of the sky is an example of a (n)

Which of the following situations demonstrates balanced force

The elements of a heterogeneous mixture can be distinguished visually. What does this mean? a. That two separate elements have been mixed together. b. That the components of the mixture cannot be separated. c.

Adding iron filings to sand

What is the density of an object if it's mass is 15 g and it's volume is 3cm3

Examples of chemical and physical changes

Is when hot parts of the earth rise as cooler parts sink due to differences in density.

Distinguish between the structures of arteries, capillaries, and venies. what is the function of each.

Which phase of matter has a fixed volume but variable shape

Given 10.8 grams of substance Y, if the substance absorbs 231 kilojoules of energy and the specific heat of the substance is 6.55 J/g·°C, what is the change in temperature?