Heat Transfer

• A The hot water melted the glue that was holding the lid shut, making it easier to open.
• B The hot water expanded the metal lid of the jar making it easier to open.
• C The hot water caused the jar to contract, making the lid easier to open.
• D. The hot water made it easier for the student to get a grip on the jar, so it was easier to open.

• A. the coolness from the ground is transferred to the animals body, lowering the animals body temperature
• B. Dirt on the ground protects the animal from the heat in the air, lowering the animal's body temperature.
• C. The animals body temperature does not change, but the dirt makes the animal feel cooler.
• D. Heat from the animals body is transferred to the ground, lowering the animal's body temperature.  

• A. When water freezes it contracts, making the ice lighter than the water.
• B. When water freezes the particles break down, making the ice lighter than water. 
• C. When the water freezes, it turns into a solid, and all solids are lighter than liquids
• D. When the water freezes it expands, making it a less dense mass that is lighter than water.

• A. A bridge without spaces will expand during a hot day and possibly crack.  
• B. A bridge without spaces will expand during a cold day and possibly crack.
• C. A bridge without spaces will contract during a hot day and possibly crack.
• D. A bridge without spaces will contract during a cold day and possibly crack.

• A. The pavement will conduct the heat and cook the egg.
• B. The egg will reflect the heat and make the pavement hotter underneath.
• C. The egg will absorb the heat and leave the pavement hotter underneath.
• D. The pavement will absorb the heat from the egg, and the egg will stay raw.

• A. from a larger object to a smaller object.
• B. from a warmer object to a cooler object.
• C. from a cooler object to a warmer object.  

• A. Plastic looks better than metal.
• B. Plastic washes easier than metal.
• C. Plastic is less expensive than metal.
• D. Plastic is not a good conductor of heat. 

• A. When temperatures get cold, the gaps allow the concrete to expand without cracking.
• B. When temperatures get hot, the gaps allow the concrete to expand without cracking.
• C. When temperatures get cold, the gaps allow the concrete to contract without cracking.
• D. When temperatures get hot, the gaps allow the concrete to contract without cracking.  

• A. Conduction
• B. Convection
• C. Combustion
• D. Radiation

• A. glass
• B. metal
• C. plastic