When an atom that has no charge loses two electrons, it becomes a

positive ion.

negative ion.

positive isotope.

negative isotope.

A 1.5m wire carries a 8 A current when a potential difference of 78 V is applied. What is the resistance of the wire? Your Answer: Question 17 options: Answer: units:

Evelyn walked to the store a distance of 1.6 km in 30 min. What is her average speed in m/s?

What types of scientific claims should be verified

An industry uses natural gas for manufacturing and uses the waste heat to produce electricity. This is an example of which processes?

Can light pass through a vacuum?

As energy moves in waves through the water, the water moves a. in waves toward shore. c. in the direction of the waves. b. in a small circular movement. d. against the current.

Which of the following values represents an index of refraction of an actual material? A. 0 B. 1 / 4 C. 5 / 4 D. 1 / 2

Which statement best describes the effect of scientific advances on society? A. They always have a positive impact on society. B. They are inspired by the needs of society. C. they do not affect society beyond the community level. D.

Which way does wind blow, A. horizontally, B. Only from east to west, C. Only from West to east, D. vertically

If you were asked how to evaluate scientific evidence, what would you would want to include in your answer?