When iron is exposed to oxygen it rusts or oxidizes. Which of these represents the balanced equation for this chemical change?

A) Fe + O → FeO

B) FeO → Fe + O

C) Fe + O2 → Fe2O3

D) 4Fe + 3O2 → 2Fe2O3

Which of the following can be sources of sediment? A. fragments of other rocks B. chemicals and minerals dissolved in water C. sea shells D. all of the above

1. What shape is the Pencil's body? a. Square c. Circle b. Triangle d. Rectangle

A large body collides with a stationary small body from the rear end. How do the bodies behave if the collision is inelastic?

The specific heat of copper is 0.385 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? Q = 0.75 g x 0.897 J/g•°C x 29°C Q = 0.75 g x 0.385 J/g•°C x 22°C Q = 0.

What energy change happens when the toaster to the right is plugged in? a. Electrical energy turns into chemical energy b. Light energy turns into electrical energy c. Electrical energy turns into potential energy d.

Most volcanoes are located at A. transform boundaries. B. midocean ridges. C. convergent and divergent boundaries. D. hot spots.

What factors affect the speed of a wave?

What direction does air resistance act on an object that is falling straight down

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?