The Earth's crust is made of rock, which is composed of minerals. Minerals are solid, naturally occurring non-living materials that have a structure of crystals. There are hundreds of different kinds of minerals, but about 90% of the ones on Earth are silicates. Silicate minerals include oxygen and silicon along with some other combination of elements like iron, aluminum or potassium. Since each mineral is made of different elements, each has a unique set of properties. For example, diamonds are very hard, iron is strong and halite (salt) tastes good on food. Which of the following is not true about minerals?
A They always include oxygen and silicon.
B They are naturally occurring materials.
C They each have unique properties.
D They have a crystalline structure.

Match each excerpt with the type of essay it represents. tiles persuasive descriptive expository narrative pairs type example modern art comes in all forms, shapes, and sizes. generally, the era known as the modern art movement includes paintings, sculptures, and other artwork created from 1880 to 1945. artwork produced during this period became progressively more abstract and less realistic. in the early part of this period, artists experimented by interpreting color, shape, and form in unique ways that represented their own visions rather than nature. at the height of the modern art movement in the early 1940s paintings and sculptures were completely abstract, with no recognizable objects. two interesting movements of this era include cubism and abstract expressionism. arrowboth

Which of these best identifies the text elements used in this text? a) heading and italics print b) pictures and capitalization c) headings and bold faced print d) capitalization and underlining

Diego rivera was a famous artist from mexico. most of his paintings were murals. murals are paintings that are made directly on a wall. rivera thought that all people should be able to see beautiful art, not just people who could afford to go to museums. this is why he painted most of his murals on the walls of public buildings