WorksheetsUnit 9
Total questions: 15
Worksheet time: 15mins
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.
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
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
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
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
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
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
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
What is the primary reason for the seasons on Earth?
The distance of Earth from the Sun changes
The tilt of Earth's axis relative to its orbit
The speed of Earth's rotation
The gravitational pull of the Moon
Which process is primarily responsible for the formation of clouds?
Evaporation
Condensation
Precipitation
Sublimation
In a controlled experiment, what is the purpose of the control group?
To provide a standard for comparison
To test the effect of multiple variables
To ensure the experiment is valid
To increase the sample size
Which of the following best describes the role of chlorophyll in photosynthesis?
It absorbs light energy for the process
It provides nutrients to the plant
It transports water within the plant
It protects the plant from herbivores
What is the main cause of ocean tides on Earth?
The gravitational pull of the Sun
The gravitational pull of the Moon
The rotation of Earth
The wind patterns over the ocean
