BENCHMARK REVIEW

The situations are examples of changes in matter I. Fireworks creating an explosion II. Freezing water to create ice III. Wood burning to create ash IV. Hot water creating steam V. Cookie dough creating cookies Which of the following are examples of chemical change?

• I , II
• I, II, & III
• I, III & V
• All of the above

What kind of change occurs when photosynthesis happens in plants?

• Physical change
• Chemical change
• Mechanical change
• Physical and chemical change

When you open a bottle of soda, you hear a fizzing sound. What causes this?

• Air entering the bottle
• The release of dissolved carbon dioxide gas
• A chemical reaction between soda and air
• The evaporation of the soda

In food packaging, why is aluminum foil used to wrap food?

• It absorbs moisture
• It is a poor conductor of heat
• It reflects heat and light, keeping food warm
• It is cheaper than other material

In a neutral atom, the number of protons is equal to the number of:

• Neutrons
• Electrons
• Quarks
• Positrons

What is the physical state of matter with a definite volume but no definite shape?

• Solid
• Liquid
• Gas
• Plasma

A fire alarm goes off while you are conducting an experiment. What is the proper response?

• Continue working until the alarm stops
• Evacuate the lab calmly and follow the school's fire drill procedures
• Try to put out any fires yourself
• Wait for instructions from the teacher before leaving

Cierra is on a camping trip with her parents. They decide to build a campfire to cook their dinner. The burning fire is an example of a —

• physical and exothermic change
• physical and endothermic change
• chemical and exothermic change
• chemical and endothermic change

The change of state from a solid to a liquid is called —

• boiling
• condensing
• melting
• vaporizing

For a student to be able to identify that a chemical change has occurred, which of the following could be observed?

• Change of color, production of odor, production of gas, production of light
• Change of color, did not produce a new substance, change shape of matter
• Change of color, change in size, no indication of energy input or output
• No change of color, no production of odor, no production of gas