Chemical Changes Assessment

Matching: Write the letter of each vocabulary term next to its matching definition.

• combustion

• a chemical reaction involving oxygen that usually gives off heat and/or light

• phase change

• a change in form or appearance of a substance that does not result in a new substance

• chemical reaction

• when two or more molecules interact and change into a new substance

• precipitate

• another name for a state of matter change such as a solid becoming a liquid

• physical change

• the formation of a solid during a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Multiselect: Read the question and check ALL answer choices that are correct. Mike and Bodhi decide to bake a cake. They gathered their ingredients and supplies. The first step was to whip the egg whites until fluffy. They melted the butter and set it aside. Next, they chopped some pecans to add to their cake. They began to mix all the other ingredients together including the melted butter. They poured the liquid-like mixture in a pan, spread it out evenly, then baked it at 350° for 30 minutes. Once done, the top of the cake was golden brown. Bodhi was surprised the cake had turned from a light-yellow batter to a darker brown color when finished. Which of the following is an example of a chemical change occurring? Choose TWO correct answers.

• whipping the eggs until fluffy

• melting the butter

• baking the cake at a high temperature

• chopping the pecans

• the golden-brown color of the top of the cake

Tags

NGSS.MS-PS1-2

Multiselect: Read the question and check ALL answer choices that are correct. Mike and Bodhi decide to bake a cake. They gathered their ingredients and supplies. The first step was to whip the egg whites until fluffy. They melted the butter and set it aside. Next, they chopped some pecans to add to their cake. They began to mix all the other ingredients together including the melted butter. They poured the liquid-like mixture in a pan, spread it out evenly, then baked it at 350° for 30 minutes. Once done, the top of the cake was golden brown. Bodhi was surprised the cake had turned from a light-yellow batter to a darker brown color when finished. Which of the following is evidence of a chemical reaction occurring during this activity? Choose TWO correct answers.

• The mixed ingredients changed to a new substance when baked.

• The butter changed from a solid to a liquid.

• The texture of the eggs changed from a gel-like substance to a fluffy substance.

• The top of the cake changed to a new color.

• The shape of the pecans changed after they were chopped.

Tags

NGSS.MS-PS1-2

Multiselect: Read the question and check ALL answer choices that are correct. Mike and Bodhi decide to bake a cake. They gathered their ingredients and supplies. The first step was to whip the egg whites until fluffy. They melted the butter and set it aside. Next, they chopped some pecans to add to their cake. They began to mix all the other ingredients together including the melted butter. They poured the liquid-like mixture in a pan, spread it out evenly, then baked it at 350° for 30 minutes. Once done, the top of the cake was golden brown. Bodhi was surprised the cake had turned from a light-yellow batter to a darker brown color when finished. Which of the following is an example of a physical change occurring? Choose THREE correct answers.

• heating the oven to 350°

• chopping the pecans

• melting the butter

• baking the cake at a high temperature

• gathering all of the ingredients and supplies

During a lab investigation, students followed this procedure: Measure the mass of the baking soda. Place the baking soda in a small beaker or glass container. Using the graduated cylinder, measure 50 mL of vinegar. Add three drops of liquid dish soap to the graduated cylinder. Slowly pour the vinegar mixture into the beaker containing the baking soda. Record your observations. Students observed that the baking soda fizzed, and the liquid expanded to overflow the beaker. After the bubbles stopped, there was very little baking soda left in the bottom of the beaker. What kind of change occurred? Support your answer using evidence and reasoning.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of change occurs when you dissolve sugar in water? Use scientific reasoning to support your answer.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

iron rusting

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

tearing paper

• chemical change

• physical change

leaves changing color

• chemical change

• physical change

ice melting

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4