Agroup of students designed a pamphlet. they used images and text to describe the chemical and physical changes that take place during cooking. which type of scientific model did the students design? a) an infographic because it visualize the molecular motion during the changes in nature. b) an infographic because the images improve understanding of the changes in matter. c) a graph because it shows interrelationship between two types of changes. d) a graph because it shows the effect of one variable on the other.

During a physical change the nature of the new substance formed remains the same in terms of its composition or the number of particles. Only properties like the state of matter, density, etc tend to change. In contrast during a chemical change the new substance is altogether of a different chemical composition.

Infographics makes use of images and text to help understand these concepts better through visualizations.

Ans : B)  An infographic because the images improve understanding of the changes in matter.

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

c. 4.54 x 10–12 j happens to be correct