Unit 9

Which of the following best explains why a [Repeat until] block was used in this project instead of a [Wait until]?

• Using a [Wait until] block would block the project flow. The VR Robot would be waiting until the Down Eye Sensor detected red before doing anything else. This would cause the VR Robot not to move.

• Using a [Wait until] block allows the robot to drive forward for 300 millimeters (mm) and then turn right for 90 degrees, forever.

• Using a [Wait until] block allows the condition of an object being detected to be constantly checked. This allows the VR Robot to drive toward an object when it is detected and turn if not.

• Using a [Wait until] block allows the conditions of the [If then else] block to be skipped. This allows the project flow to execute much faster, as the condition of an object being detected only need to be checked once in the project.

This project was used to knock all buildings off of the Dynamic Castle Crasher Playground, but it does not work correctly. Which of the following best describes the error in this project?

• The Down Eye Sensor should detect the color blue instead of the color red.

• An [If then else] block should be used instead of a [Wait until] block, because the [Wait until] block is blocking the flow of the project.

• The <Distance found object> block should be replaced with a <Pressing bumper> block.

• The [Forever] block should be removed.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

If a student put a balloon on top of a water bottle and placed the bottle in a container of very hot water. Why would the balloon expand?

• All of the water evaporated to form a gas

• The gas expanded as it became warmer

• Some of the gas condensed to liquid water

• The water expanded into the balloon as it became warmer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

The picture shows the same balloon, but at different temperatures. When the temperature decreases, what is reduced?

• Volume of the balloon

• Strength of the balloon

• Mass of gas particles in the balloon

• Number of gas particles in the balloon

Tags

NGSS.MS-PS1-4

Which most likely causes winds to blow on Earth?

• Earth spins quickly, causing air to blow around

• Gravity of Earth and Moon push and pull air

• Warm air rises and cool air falls towards surface of Earth

• Ocean waves push air to shore and across the surface of the Earth

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

How does the transfer of energy from the Sun to Earth compare with the way the energy is distributed in ocean water?

• Energy from the Sun is transferred through convection, while energy in ocean water is distributed through conduction

• Energy from the Sun is transferred through radiation, while energy in ocean water is distributed through convection

• Energy from the Sun is transferred through conduction, while energy in ocean water is distributed through radiation

• Energy from the Sun is transferred through radiation, while energy in ocean water is distributed through conduction

If a jet stream is moving from the west to the east coast across the United States, which characteristic is most important in predicting weather patterns?

• Jet stream controls the speed of surface wind

• Jet stream controls the direction of surface wind

• Jet stream separates moist northern air from dry southern air

• Jet stream separates cold northern air from warm southern air

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

Radiant energy from the Sun warms up parts of the Earth unevenly, which causes convection currents that produce wind and weather. How do convection currents cause air to circulate?

• Hot air rises and cold air sinks, causing motion

• Hot air sinks and cold air rises, causing motion

• Warm air from the tropics is propelled north by Coriolis Effect

• Cool air from the arctic is propelled south by the Coriolis Effect

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5

The uneven heating of the Earth causes convection currents. What part of the process is demonstrated in the picture?

• As air cools, currents flow counterclockwise

• As air cools, currents flow clockwise

• Heat causes gases to expand

• Heat causes gases to contract

Tags

NGSS.MS-ESS2-6

What factor is most responsible for the movement of air?

• Uneven heating of air

• Imbalance in organisms breathing air

• Sunlight getting blocked by land

• Different levels of liquid in air

Tags

NGSS.MS-ESS2-6

NGSS.MS-ESS2-5