Very light items remain on the surface of water because of surface currents.

True or false

J. J. Thomson's experiments provided evidence that an atom A. is the smallest particle of matter. B. contains negatively charged particles. C. has a negative charge. D. has a positive charge.

Steel is a mixture of iron and carbon. It can be separated into iron and carbon by melting it. What is steel? A. A compound B. An element C. A molecule D. An alloy

Current can also be called a. voltage. b. electricity. c. moving charges. d. b. and c.

Why is having a scientific model of an Atom important

Which of the following can be used to measure wavelength on a transverse wave

A high speed train travels with an average speed of 227 km/hr. The train travels for 2hrs how far does the train travel

Why does a fluid become less dense when it is heated?

The period of a simple pendulum in a grandfather clock on another planet is 1.80 s. What is the acceleration due to gravity (in m/s2) on this planet if the length of the pendulum is 1.00?

Tuition and fees, books, supplies and room and board all figure into a students?

This is a bond in which a single pair of electrons is shared between a pair of atoms