Please spend some time reflecting on what you've learned about acids and bases and think about some of the cleaning items in your house. Answer the questions below and
forward them to your teacher. Each question is worth 10 points.
1. Think about some of the items that we use and consume everyday, like shampoo,
toothpaste, soap, food, etc. Which of the items are acids, and which are bases? Keep
a journal of various items you use for one week. Include in your journal several
properties of each item, whether it is an acid or a base, and why you think so.

the correct answer is c   with the systems

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

they dont have any evidence

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .