Science 8 - Testlet 006- Physical Science

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9 Nsɛmmisa

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Science 8 - Testlet 006- Physical Science

Last updated 4 months ago

9 Nsɛmmisa

Gas-Powered Boats

In an eighth-grade science classroom, students were tasked with creating a model gas-powered boat. The teacher told the students that they would design their boats and then race them in a local lake. However, students were limited to using the materials listed below in their design.

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One group of students decided to build their boat based on this diagram.

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The students followed these steps when launching their boats.

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This picture shows how the boat moved through the water.

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The students were excited to see the boat move. They made careful observations about what they saw.

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This question has two parts.

The students measured out the amounts of baking soda and vinegar they would use as “fuel” for their gas-powered boats. The students used the data table below to record the masses of the materials.

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After the investigation, the students measured the total amount of material that remained in the bottle.

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The students measured the amount of material in the bottle as being .

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During the course of the boat race investigation, the teacher discussed the flow of energy throughout the system.

Drag the correct label in each empty box to identify the type of energy that applies to that part of the investigation. Each label can be used only once.

Mmuae Afoforo a Wobɛpaw:

thermal energy

kinetic energy

potential energy

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During the investigation, students observed several changes. Which two statements are pieces of evidence that support that a chemical change occurred during the investigation?

The label was removed from the bottle when making the boat.

The bottle was cut to insert the straw into the boat.

The temperature of the contents of the bottle decreased.

The glue from the glue stick melted and then became solid again.

Bubbles formed when the vinegar and baking soda were combined.

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When thermal energy is added or removed from a substance, the temperature of the substance changes, and the particles that make up the substance change in speed and spacing. The model in the picture shows changes in the motion of particles of a substance.

Change in Particle Motion

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In the model temperature is .

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The students built two identical gas-powered boats using the same materials and design. On one of the boats, they attached a small balloon to the end of the straw. The students followed the same boat launch procedure as described in the investigation in the passage.
After the investigation, the students measured the mass of each boat. The boat with the balloon on the straw had more mass than the boat without the balloon, even after subtracting the mass of the balloon.
Explain why there was more mass in the boat with a balloon on the straw than in the boat without a balloon on the straw.

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The students observed that the temperature decreased inside the bottle during the investigation.

The temperature decrease shows that the reaction.

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Science 8 - Testlet 006- Physical Science

Science 8 - Testlet 006- Physical Science

Gas-Powered Boats

During the investigation, students observed several changes. Which two statements are pieces of evidence that support that a chemical change occurred during the investigation?

Gas-Powered Boats

Part B: Select the three phrases that correctly describe vinegar.

During the investigation, students observed several changes. Which two statements are pieces of evidence that support that a chemical change occurred during the investigation?

Part B: Select the three phrases that correctly describe vinegar.