Review for 2nd MP Quarterly

Name the three types of thermal energy transfer

• cutting paper

• convection

• radiation

• conduction

Identify the reaction type the image is showing.

• Endothermic

• Exothermic

• Physical Change

• Melting ice

Identify what all the alternative fuels have in common.

• They all have the same properties as the sources they are derived from.

• They all have a limited impact on the environment since they are inexpensive.

• They all are made of natural materials that underwent a chemical process.

• They all have the same kinetic energy based on their physical state of matter.

Consider how to build a volcano. Which are indicators of a physical and a chemical change (note two answers).

• Mixing food coloring, dish soap, and vinegar together produces a color change which indicates a chemical change.

• Mixing the food coloring, dish soap, and vinegar together produces a color change which indicates a physical change.

• Mixing the vinegar solution and baking soda together produces bubbling and fizzing which indicates a chemical change.

• Mixing the vinegar solution and baking soda together produces bubbling and fizzing which indicates a physical change.

Which two reactions indicate a chemical reactions?

• Temperature stays the same while solids dissolve.

• The liquid was clear, turns blue.

• The temperature decreases and bubbles are formed.

• The two liquids separate, one floats to the top while the other sinks to the bottom.

Ice was added to each beaker. Which environment had the greatest temperature change.

• Environment #1 had less ice added to the beaker since it had the smallest change in temperature.

• Environment #1 had more ice added to the beaker since it had the greatest change in temperature.

• Environment #4 had less ice added to the beaker since it had the greatest change in temperature.

• Environment #4 had more ice added to the beaker since it had the smallest change in temperature.

Answer explanation

More ice absorbs more thermal energy.

Choose the best chemical reaction for an ice pack.

• Chemical reaction absorbs thermal energy, uses 5 g of reactant, and produces water.

• Chemical reaction releases thermal energy, uses 2 g of reactant, and produces toxic gas.

• Chemical reaction absorbs thermal energy, uses 10 g of reactant, and produces water.

• Chemical reaction absorbs thermal energy, uses 70 g of reactant, and produces harmless gas.

Identify the type of reaction the image is displaying.

• Exothermic

• Endothermic

• Physical change

• Happy change

Which cup transfers the least amount of energy?

• Cup A

• Cup B

• Cup C