Benchmark Review #1

Water cooled to 0°C will change to a solid. A chocolate bar heated to 30°C will change

to a liquid.

Which property of matter is changing when the substances are cooled or heated?

• freezing point

• mass of matter

• melting point

• phase of matter

Which statement shows a new material has been formed?

• The ending material has a different mass than the starting material.

• The ending material has different properties than the starting material.

• The ending material is in less pieces than the starting material.

• The ending material is in larger pieces than the starting material.

Which two examples show heating by convection?

• Ice cream spilled on a hot sidewalk melts.

• A heater at the bottom of a pool heats all the pool water.

• A metal spoon in a bowl of hot soup becomes warm.

• The water in a hot pan boils and bubbles over the top of the pan.

• Ice cubes held in a person’s hand change to a liquid.

Which statement correctly explains the action that creates a new material?

• Boiling an egg creates a new material because a cooked egg cannot be changed back to its starting form.

• Crushing a can creates a new material because the can is now smaller.

• Breaking a glass vase creates a new material because it will take a long time to change it back to a whole glass vase.

• Hanging wet clothes in the sunlight creates a new material because the clothes no longer have water on them.

Which sentence correctly explains the changing temperature of the water?

• Heat moves from the water to the room, warming the water.

• Heat moves from the water to the room, cooling the water.

• Heat moves from the room to the water, warming the water.

• Heat moves from the room to the water, cooling the water.

Which change should the student make in the model to meet the needs of the task?

• Replace the wood ice cream sticks with cotton cloth to move the most heat into the house.

• Replace the cotton cloth with glass windows so that heat can move into the house.

• Use aluminum sheets as the walls of the house to trap the heat inside the house.

• Use only wood ice cream sticks for the entire model so that heat stays inside the house.

What mass should the weighing balance show after the salt disappears in the water?

• 20 grams

• 120 grams

• 150 grams

• 170 grams

Which material should the designer avoid using, and why?

• Plastic; it takes the longest to heat.

• Metal; it heats quickly.

• Wood; it heats the quickest.

• Metal; it heats slowly.

The original material in an experiment is red. After the experiment, the material is blue. Does the color change prove a chemical reaction caused a change to the material?

• only if all the material is blue

• only if the new color cannot be changed again

• only if the color can change back to red

• only if a new material was also formed

How is the water removed from the travel mug?

• The heat from the Sun causes the water inside the travel mug to form droplets on the outside of the mug.

• The heat from the Sun causes the water inside the travel mug to change to a solid and fall out of the mug.

• The heat from the Sun causes the water inside the travel mug to change to a gas and leave the mug.

• The heat from the Sun causes the water inside the travel mug to drip out of the mug.