3rd Grade Chapter 5 Test

A very tall building is called a skyscraper because it is a term used to describe a high-rise building that has multiple floors and is significantly taller than the surrounding buildings. Skyscrapers are often found in urban areas and are known for their impressive height and architectural design. They are constructed using strong materials and advanced engineering techniques to ensure stability and safety at such great heights. Skyscrapers have become iconic structures in many cities around the world, symbolizing progress, modernity, and urbanization.

Pasteurization is the process of heating a substance, such as milk or juice, to a specific temperature for a certain amount of time in order to kill or deactivate harmful microorganisms, including bacteria and viruses. This process helps to make the substance free of germs and safe for consumption. Vaccines, on the other hand, are substances that stimulate the immune system to protect against specific diseases, while skyscrapers are tall buildings. Therefore, the correct answer for making something free of germs by using heat is pasteurization.

Doctors give people a vaccine to prevent diseases like polio. A vaccine is a biological preparation that contains a weakened or killed form of a specific pathogen, such as a virus or bacteria. When administered, it stimulates the immune system to produce an immune response, including the production of antibodies, without causing the actual disease. This helps the body recognize and fight the pathogen if it is encountered in the future, providing immunity and preventing the disease from occurring.

Steel is the correct answer because it is a strong and flexible material that allowed for the construction of tall buildings. Skyscrapers require a material that can support their weight and withstand the forces of wind and other external factors. Steel's strength and durability made it possible to build structures that reached great heights, revolutionizing the field of architecture and urban development. Without the invention of steel, the construction of skyscrapers would not have been feasible.

A firefighter's daily job involves responding to emergencies, such as fires, accidents, and medical incidents, to protect lives and property. They play a crucial role in keeping the community safer by extinguishing fires, rescuing people from dangerous situations, providing medical assistance, and educating the public about fire safety. Their dedication, bravery, and skills make them an essential part of maintaining community safety.

The question "How are these things different?" is the appropriate question to ask when contrasting two things. This question focuses on identifying the distinctions and variations between the two things being compared. It allows for a comparison of their unique characteristics, qualities, or features that set them apart from each other.

After the Great Chicago Fire of 1871, the city underwent a significant transformation. The fire had destroyed a large portion of the city, leading to the need for rebuilding. As a result, Chicago became a hub for architectural innovation, and skyscrapers started to emerge. This period marked the birth of modern skyscraper construction techniques, with architects like Louis Sullivan pioneering the use of steel frames and elevators. The construction of skyscrapers not only changed the city's skyline but also symbolized Chicago's resilience and determination to rebuild and thrive.

The correct answer is that lettuce and carrots are vegetables. This is because both lettuce and carrots are edible plants that are commonly consumed as part of a healthy diet. While the other statements may also be true, they do not specifically compare lettuce and carrots to each other.

When you compare things, you are highlighting their similarities and pointing out the ways in which they are alike. This involves examining the characteristics, qualities, or features of two or more things and identifying the commonalities between them. By comparing, you are able to draw connections and make observations about the similarities shared by the objects or concepts being compared.

The correct answer is "They have ports on the water." This is because both Chicago and New York City are located on the coastlines of the United States and have ports that facilitate trade and transportation by water. This similarity sets them apart from the other options provided, as the other statements focus on differences between the two cities rather than a shared characteristic.

The correct answer is "They write in different shades". This option contrasts a pen and a pencil by highlighting the difference in the shades they produce when used for writing. While both a pen and a pencil are used for writing, the shade or color of the ink or graphite they produce is different. A pen typically produces a darker and more consistent shade, while a pencil produces a lighter and potentially varied shade depending on the pressure applied.

After a devastating fire in Chicago, there was a significant amount of vacant land available for new construction. This created an opportunity for the city to rebuild and innovate, leading to the construction of the first skyscraper. The availability of space allowed architects and engineers to experiment with taller and more efficient building designs, ultimately giving rise to the concept of skyscrapers.

Pastuerization is a process that involves heating milk to a specific temperature in order to kill harmful bacteria and pathogens. By making milk safe to drink, pasteurization greatly improved public health and reduced the risk of diseases such as tuberculosis, typhoid fever, and brucellosis that can be transmitted through raw milk. This advancement in food safety had a significant impact on people's lives, ensuring that they could consume milk without the fear of falling ill.

Alexander Graham Bell helped people by starting a school for the deaf people. This indicates that he recognized the needs of the deaf community and took action to provide them with education and support. By establishing a school specifically for deaf individuals, Bell contributed to their empowerment and inclusion in society, enabling them to communicate and learn effectively.

Jane Addams helped Chicago by starting Hull House. Hull House was a settlement house that provided social and educational services to the immigrant population in Chicago. It aimed to improve the living conditions and provide support to the less fortunate individuals and families. Addams' efforts through Hull House had a significant impact on the community, addressing issues such as poverty, healthcare, education, and social reform.

Charles Drew is the correct answer because he was a prominent African American surgeon and medical researcher who studied and developed techniques for preserving blood plasma. He made significant contributions to the field of blood transfusion and was instrumental in establishing blood banks. His research and innovations in blood preservation techniques have had a lasting impact on modern medicine and have saved countless lives.