Science Olympiad Crime Busters 2010-2011

1. What are the main three fingerprints?

Whorl, loop, and arch.

Whorl, tent arch, and circular.

Loop, circle, and triangle.

The main three fingerprints are whorl, loop, and arch. Whorl refers to a pattern where ridges form a circular or spiral shape. Loop refers to a pattern where ridges enter from one side of the finger and exit from the same side. Arch refers to a pattern where ridges enter from one side and exit from the other side, forming a wave-like shape. These three patterns are commonly used in fingerprint identification and classification.

Explanation

The main three fingerprints are whorl, loop, and arch. Whorl refers to a pattern where ridges form a circular or spiral shape. Loop refers to a pattern where ridges enter from one side of the finger and exit from the same side. Arch refers to a pattern where ridges enter from one side and exit from the other side, forming a wave-like shape. These three patterns are commonly used in fingerprint identification and classification.

2. What is DNA made up of?

Twisted ladders.

Blood.

Genes.

DNA is not made up of twisted ladders or blood. DNA is a complex molecule that contains the genetic instructions for the development and functioning of all living organisms. It is made up of a long chain of nucleotides, which are composed of a sugar, a phosphate group, and a nitrogenous base. Genes, which are segments of DNA, carry the information for specific traits or characteristics. Therefore, the correct answer is genes.

Explanation

DNA is not made up of twisted ladders or blood. DNA is a complex molecule that contains the genetic instructions for the development and functioning of all living organisms. It is made up of a long chain of nucleotides, which are composed of a sugar, a phosphate group, and a nitrogenous base. Genes, which are segments of DNA, carry the information for specific traits or characteristics. Therefore, the correct answer is genes.

3. How long is this event?

60 minutes

1 hour and 25 minutes

50 minutes

The event is 50 minutes long.

Explanation

The event is 50 minutes long.

4. What are the three groups of fibers?

Fruit, Fur, and plastic.

Animal, Vegetable, and man-made.

Both.

The three groups of fibers are animal, vegetable, and man-made. This means that fibers can be categorized into three main groups based on their source: animal fibers come from animals, vegetable fibers come from plants, and man-made fibers are synthetic or artificial.

Explanation

The three groups of fibers are animal, vegetable, and man-made. This means that fibers can be categorized into three main groups based on their source: animal fibers come from animals, vegetable fibers come from plants, and man-made fibers are synthetic or artificial.

5. What is the pH of lemon juice?

4-5

3

6

Lemon juice has a pH of 3, making it acidic. The pH scale ranges from 0 to 14, with 0 being the most acidic and 14 being the most alkaline. A pH of 3 indicates that lemon juice is highly acidic, which is why it has a sour taste. The acidity of lemon juice is due to the presence of citric acid, which gives it its characteristic flavor and pH level.

Explanation

Lemon juice has a pH of 3, making it acidic. The pH scale ranges from 0 to 14, with 0 being the most acidic and 14 being the most alkaline. A pH of 3 indicates that lemon juice is highly acidic, which is why it has a sour taste. The acidity of lemon juice is due to the presence of citric acid, which gives it its characteristic flavor and pH level.

6. The bigger the splatter, the ________ _______ was used to make it.

Less energy

More energy

Less aim

More aim

The bigger the splatter, the less energy was used to make it. This implies that a smaller amount of energy was required to create a larger splatter. This could be because a larger splatter indicates that the substance was more easily dispersed, requiring less force or energy to achieve a wider spread.

Explanation

The bigger the splatter, the less energy was used to make it. This implies that a smaller amount of energy was required to create a larger splatter. This could be because a larger splatter indicates that the substance was more easily dispersed, requiring less force or energy to achieve a wider spread.