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1. How does nanotechnology help engineers make products for the future?
a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.***
b. By changing a material's atomic structure, its physical properties can also be changed.
c. By changing a material's atomic structure, it will be more useful in synthetic biology.
d. By changing a material's atomic structure, it can eliminate the need to use fossil fuels.

2. How are nanoparticles being used today?
a. Nanoparticles are already being used to deliver drugs to certain parts of the body.
b. Nanoparticles are already being used to make materials that clean themselves.
c. Nanoparticles are already being used as a substitute for fossil fuels.
d. Nanoparticles are already being used in some sunscreens.***

3. What possible solution are engineers investigating in case Earth's resources are depleted?
a. mining near-Earth asteroids
b. creating new materials through nanotechnology***
c. increasing the use of robots in harsh environments
d. developing smaller, less expensive computers

***=my answer
Thanks!

1. To find the correct answer to question 1, we can go through each option and evaluate if it explains how nanotechnology helps engineers make products for the future:

a. "By changing a material's atomic structure, it can be made from elements that are easier to obtain." This answer suggests that nanotechnology can alter the atomic structure of materials, making it possible to produce them using elements that are more readily available. While this is a potential benefit of nanotechnology, it does not directly address how it helps engineers make products for the future.

b. "By changing a material's atomic structure, its physical properties can also be changed." This answer highlights a fundamental capability of nanotechnology. By manipulating the atomic structure of materials at the nanoscale, engineers can modify their physical properties. This is a crucial aspect of developing advanced materials and products for the future. It allows for the creation of materials with enhanced strength, conductivity, or other desirable properties.

c. "By changing a material's atomic structure, it will be more useful in synthetic biology." This answer focuses on the application of nanotechnology in the field of synthetic biology. While nanotechnology can indeed contribute to advancements in synthetic biology, it is not the primary way in which it helps engineers make products for the future.

d. "By changing a material's atomic structure, it can eliminate the need to use fossil fuels." This answer suggests that nanotechnology can play a role in reducing or eliminating the reliance on fossil fuels by altering the atomic structure of materials. While this is an exciting possibility, it does not directly address how nanotechnology assists engineers in making products for the future.

From evaluating the options, option b is the most appropriate answer. By changing a material's atomic structure, nanotechnology allows engineers to modify its physical properties, enabling the development of innovative and advanced products for the future.

2. Now, let's evaluate the options for question 2 to identify how nanoparticles are being used today:

a. "Nanoparticles are already being used to deliver drugs to certain parts of the body." This answer highlights the use of nanoparticles in drug delivery systems. Nanoparticles can be designed to carry and transport drugs to specific target sites in the body, enhancing their effectiveness and reducing side effects.

b. "Nanoparticles are already being used to make materials that clean themselves." This answer suggests the use of nanoparticles in creating self-cleaning materials. These materials incorporate nanoparticles with unique properties to repel dirt, water, or other undesired substances, making them easier to clean and maintain.

c. "Nanoparticles are already being used as a substitute for fossil fuels." This option is incorrect as nanoparticles are not used as a direct substitute for fossil fuels.

d. "Nanoparticles are already being used in some sunscreens." This answer correctly states a current application of nanoparticles in sunscreens. Nanoparticles, particularly titanium dioxide and zinc oxide, are used in sunscreens to provide effective UV protection.

Based on the evaluation, option d is the correct answer. Nanoparticles are currently being used in some sunscreens.

3. Lastly, let's determine the possible solution engineers are investigating in case Earth's resources are depleted:

a. "Mining near-Earth asteroids" suggests that engineers are exploring the possibility of mining asteroids to compensate for the depletion of Earth's resources.

b. "Creating new materials through nanotechnology" implies that engineers are considering the use of nanotechnology to develop alternative materials that can replace depleted resources. This answer aligns with the notion that nanotechnology allows for precise control over material properties, offering the potential to create new materials with desired characteristics.

c. "Increasing the use of robots in harsh environments" relates to the idea that engineers are exploring the use of robots to perform tasks in challenging or hazardous environments. While this may be a potential solution, it is less directly related to the depletion of Earth's resources.

d. "Developing smaller, less expensive computers" focuses on the development of smaller and more affordable computers, but it does not directly address the issue of depleted resources.

From the options, option b is the correct answer. Engineers are investigating the possibility of creating new materials through nanotechnology to address the depletion of Earth's resources.

I hope this explanation helps!