A student is constructing four different electrical circuits. Each circuit has a battery, wires, a switch, and a light bulb.
Which of the following is the best way for the student to record information so that another student can construct exactly the same four circuits?
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Question 2
2.
The diagram below shows a student’s design for a pulley system used to lift objects up to a platform.
Which of the following is most important to consider when choosing the type of rope for the pulley system?
The most important information to consider when choosing the type of rope for the pully system is the __________ that the __________ will hold when it is lifted.
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Question 3
3.
An engineer is testing different types of pervious concrete to use in a new parking area. Pervious concrete is a special kind of concrete that can help reduce flooding by allowing rainwater to pass through and soak into the ground.
Which of the following should the engineer measure to see how well a type of pervious concrete will reduce flooding?
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Question 4
4.
Houses built in places that have hurricanes need to be protected from strong winds and flooding. The design shown helps keep winds from blowing the roof off a house during a hurricane.
Which drawing represents the best way to modify the house so that it is also protected from flooding?
1 point
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Question 5
5.
A software engineer designed a new version of a video game. The original version of the game and the new version are compared in the table.
Select three design criteria the engineer most likely used in designing the new version of the game.
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Question 6
6.
A scientist tested four objects: W, X, Y, and Z. Two of the objects were made of the same substance, and the other objects were made of different substances. The scientist collected the data in the table.
Identify the two objects that were made of the same substance. Explain your reasoning and include data from the table to support your answer.
1 point
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Question 7
7.
A group of students stirred sand into a beaker of water. The beaker was set on a table for 10 minutes. After 10 minutes, three layers formed in the beaker as shown in the diagram.
The students make these observations after 10 minutes:
- The top layer was mostly water with some sand particles.
- The middle layer was mostly solid with small grains of sand.
- The bottom layer was mostly solid with large grains of sand.
- Each layer was at room temperature.
Some students claimed that a chemical reaction took place when the sand was stirred into the water. Other students claimed that a mixture was formed.
Which of the following is best supported by the students' observations?