If you were a scientist trying to separate pollution molecules from the air, how might you do it? (This question appears on page 23 of Break It Down.)

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

Which of the following describes how a microwave heats food

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress. based on the graph, during what time is the velocity constant and positive?