1. An arch is a landform formed when wind picks up tiny bits of rock and sand and blows them against rock. The action of the wind and rock causes bits to break off the rock and blow away, carving an
arch. Which of the following two processes are responsible for an arch formation?
A. Erosion and deposition
B. Weathering and erosion
C. Deposition and weathering
D. Weathering and condensation
I need help right now I will give you extra brain points if you answer this question

B

Explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.