What three things happen when air is warmed?

a) it expands

b) it contracts

c) it becomes lighter

d) it becomes heavier

e) it rises

f) it sinks

Quincy listed some natural resources in a table. Which best completes the table? A. X: No Y: Natural gas B. X: yes Y: Coal C. X: no Y: wind D. X: yes Y: sunlight

Which of the following is responsible for the overall integration of the autonomic nervous system (ANS) ? A. peripheral ganglia B. cerebral cortex C. brain stem D. hypothalamus

Two negative charges that are both - 0.3C push each other apart with a force of 19.2 N. How far apart are the two charges?

If the sound wave leaves the boulder and travels through the air, what would happen to the sound wave's speed?

You have a three-year fixed rate lease of $750/month due to expire next month. Your landlord is willing to renew the three-year lease with a 4% total rent increase. What is your rent over the three-year life of the new lease?

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies

Beth made the chart shown. A 2-column table with 1 row. The first column labeled X has entries Wall clock, T V remote control, Portable music player. The second column labeled Y has entries Refrigerator, Table lamp, Hair dryer.

Which sentence states Newton's third law? If two objects collide, each object exerts a force in the same direction as the other. If two objects collide, each object exerts a force equal to and in the opposite direction of the other.

Why did the chicken cross the road.