Crude oil is derived from which of the following materials?

1. Marine Organisms

2. Plants

3. Rocks

4. Salts

The eight most common elements in Earth's crust are: O, Si, Al, Fe, Ca, Na, K, and Mg. These elements account for 98% of the atoms in Earth's crust.

Rock samples, taken from the Moon, contain many of the same minerals as those found on Earth. Why might this be the case?

When a piece of magnesium is connected to an iron pipe, the iron is prevented from corroding. Which of the following is the best explanation? Magnesium reacts with the ground water to form a protective coat on the iron pipe of Mg (OH) 2.

7. What is the volume of a penny if the mass is 0.2 g, and the density is 8.96 g/cm^3? A. 2 cm^3 B. 0.22 cm^3 C. 20 cm^3 D. 1.8 cm^3

How Are Molecules in a solid different from molecules in a liquid?

Which element has an ion that is smaller than an ion of calcium? potassium strontium cesium magnesium

Since particles in a solid are arranged close together in a regular pattern, some can be classified as i think magma not 100% sure A. gradients. B. crystals. C. plasma. D. magma.

Two examples of common items that use chemical change

Give two sources of energy that can cause ocean waves

Chromium, calcium, and potassium are near each other on the periodic table and have some common characteristics but differ in chemical reactivity.