In science class, harry and his classmates are performing a controlled scientific investigation. the teacher has already picked a topic and testable question for the class to study and has provided background research on the topic. before performing the investigation, the students must first a. form a hypothesis to predict the outcome of the investigation. b. analyze the data that results from the investigation. c. record data from the investigation in graphs and charts. d. communicate the results of the investigation with the teacher.

The steps of research follow the sequence as

a) make an observation

b) Propose a hypothesis for the observation made

c) Prediction of the correctness of hypothesis

d) Perform experiment

e) conclude the problem

So answer is

i) record data from the investigation in graphs and charts.

ii) form a hypothesis to predict the outcome of the investigation.

iii) analyze the data that results from the investigation

iv) communicate the results of the investigation with the teacher.

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.