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Look at the picture. Which of these living organisms was interacting with another living organism in the environment? 5.9A

• Fire Ant
• Blue Jay
• Bee
• Hawk

Resources can be classified as renewable or nonrenewable. Which of these resources is classified in the same category as coal? 4.7C

• Wood
• Wind
• Corn Oil
• Petroleum

Based on the table, which material would be best to use to insulate electrical wires? 5.5A

• Wood
• Copper
• Plastic 
• Steel 

If all the dead branches and dying trees in a wooded area are removed, which bird’s nesting habit would be most affected? 5.9C

• Baltimore oriole 
• Barn Swallow
• Downy woodpecker
• Belted kingfisher

Which organisms in this food web eat only consumers? 5.9B

• Okapis
• Civets
• Leopards
• Gorillas

5.10A Some animals, such as lions, have pointed teeth, while other animals, such as cattle, have flat teeth. 
The difference in the shape of these animals' teeth is most closely related to -

• the type of organisms the animals consume
• the sounds the animals make
• the habitat the animals live in
• the type of predators the animals have

Which property of light makes it possible to produce hand shadows?
5.6C

• Light can be refracted.
• Light is a form of energy.
• Light travels in straight lines
• Light can be separated into different colors.

5.6 A When a bat searches for prey at night, it makes sounds as it flies, and it uses the sounds’ echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using —

• thermal energy and light energy
• sound energy and thermal energy
• mechanical energy and sound energy
• light energy and mechanical energy

Some people add sugar to their hot tea. Which property of the sugar remains the same when the sugar is in the tea solution? 5.5 C

• The taste of the sugar
• The size of the sugar crystals
• The color of the sugar
• The texture of the sugar

Some students make a model to show one of the first steps in the formation of sedimentary rock. The students pour 2 centimeters of light-colored sand into a clear plastic box. Then they add 1 centimeter of gravel. Finally they pour 2 centimeters of dark-colored sand on top of the gravel. Which characteristic of sedimentary rock does this model best show? 5.7A

• Sedimentary rock is made of layers.
• Sedimentary rock is cemented bits of rock.
• Sedimentary rock is often limestone.
• Sedimentary rock is common in Texas.