What kind of reaction involves burning?

Why when you rub two objects together they produce

What's a person code? A. The code stipulating the number of people on your insurance plan B. The code assigned to any employee by his / her employer in the medical field C.

Mohs scale is used in describing which characteristic?

What is loudness? a) the frequency of a sound wave b) the rate at which a wave's energy flows through a given area c) the amplitude of a sound wave d) the physical response to the intensity of sound, modified by physical factors

Undersea mountain ranges in the middle of the ocean floors are known as d͟e͟e͟p͟-͟o͟c͟e͟a͟n͟ ͟t͟r͟e͟n͟c͟h͟e͟s. True or False If the statement is false, change the underlined word or words to make state true.

A switch in an electric circuit controls the flow of electrons in the circuit. True O False

What are three common forms of work in science

A boat travels north across a river at a velocity of 22 meters/second with respect to the water. The river's velocity is 2.2 meters/second to the east. What is the resultant velocity of the boat, as measured from the land?

The multiple reflection of a single sound wave is a/an a. reverberation. b. echo. c. diffraction. d. refraction.

Which of the following methods of improving air quality does not require advanced technology?