Matter & Energy

Students observed a piece of iron change from shiny to rusty. What caused this change?

• a chemical reaction

• a heat reaction

• a cold reaction

• a physical reaction

Which is the best example of the transfer of heat by radiation?

• water boiling

• ice melting

• a hot air balloon rising

• a lightbulb glowing

Jason fills a glass container completely with water and screws the lid on tightly. He places the container in a freezer. Which will most likely result?

• The container will prevent the water from freezing.

• The water will freeze and take up less space in the container.

• The water in the container will expand when it freezes and cause the container to crack.

• The container will absorb heat from the water, causing it to crack.

Two liquids are poured together, and a solid substance forms with no liquid remaining. Liquid 1 has a mass of 200 grams, and liquid 2 has a mass of 100 grams. What would be the total mass of the solid substance formed?

• 100 grams

• 150 grams

• 250 grams

• 300 grams

Which is the best example of a new substance forming?

• lighting a match

• cutting a piece of paper

• popping a balloon

• hitting a nail with a hammer

Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?

• Heat energy transfers from the metal spoon to the hot liquid.

• Heat energy transfers from the hot tea to the spoon.

• Heat energy transfers from the air to the hot liquid, and then to the spoon.

• Heat energy transfers from the hot liquid to the cup, and then to the spoon.

Which material is best used to keep cold drinks from getting warm too quickly?

• glass, because it is a good conductor of heat

• foam, because it is a poor conductor of heat

• metal, because it radiates heat

• paper, because it conducts heat

Why are liquids sometimes used in a thermometer?

• because most liquids condense when heated and evaporate when cooled

• because most liquids melt when heated and freeze when cooled

• because most liquids contract when heated and expand when cooled

• because most liquids expand when heated and contract when cooled

James wanted to observe the interaction between his favorite soda and some candy. James poured 20 ounces of soda and 2 ounces of candy in a closed container weighing 5 ounces. What would most likely be the weight of the mixture and container after the candy has completely dissolved?

• 5 ounces

• 20 ounces

• 25 ounces

• 27 ounces

Which experiment would most resemble the complete water cycle?

• watering plants

• burning wet wood

• water flowing from a faucet

• boiling a pot of water with a lid on it