Acceleration — Cumulative exam

Question 1

Sonya reads the element riddle below.I am shiny. I form +1 ions. There’s more!I am the most reactive metal in Period 4. Who am I?Which element is the answer to the riddle?

Revolt · Accepted Answer

potassium

Question 2

Which best describes a semiconductor?

Revolt · Accepted Answer

Semiconductors are more conductive than a nonmetal and less conductive than a metal.

Question 3

In an investigation that uses the scientific method, which step immediately follows making a hypothesis?

Revolt · Accepted Answer

designing an experiment

Question 4

Which will decrease the rate of a reaction?

Revolt · Accepted Answer

changing the temperature from 90ºC to 40ºC

Question 5

Based on its location on the periodic table, which metal is likely to be less reactive than both strontium and sodium?

Revolt · Accepted Answer

magnesium (Mg)

Question 6

Alai records data about making a mixture of salt and water. Which best explains why Alai’s salt measurement is wrong?

Revolt · Accepted Answer

It should be recorded in milligrams.

Question 7

Which best describes a compound such as magnesium oxide?

Revolt · Accepted Answer

a pure substance that is made up of different elements

Question 8

When a drawing of a circle made in the center of a piece of paper with a black marker gets wet, the marker bleeds, and as the water moves through the paper the ink separates into several colors. What method of separation does this describe?

Revolt · Accepted Answer

chromatography

Question 9

Which has most likely been peer reviewed?

Revolt · Accepted Answer

an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology

Acceleration — Cumulative exam Answers

More from this Course

TRY EDGENUITY HACKS