J. c. wants to determine if there is a relationship between room color and sleep. based on his research, j. c. makes an educated guess that people fall asleep more quickly in a room painted blue than in a room painted yellow. he asks several people which color they like better, yellow or blue, and uses their responses to see if his educated guess was correct. what is missing from j. c.’s scientific investigation?

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Is a pencil falling to the floor anon contact force, a force, or a contact force