How Much Science Do You Know?

2.

Dry ice is a form of what?

Frozen nitrogen
Frozen carbon dioxide

Correct Answer

A. Frozen carbon dioxide

Explanation

Dry ice is a form of frozen carbon dioxide. It is called "dry" ice because it does not melt into a liquid when heated, but instead goes through a process called sublimation, where it changes directly from a solid to a gas. Dry ice is commonly used for cooling purposes, such as preserving perishable items during transportation or creating special effects in theater productions.

Rate this question:

3.

The earth's atmosphere is 10% oxygen.

True
False

Correct Answer

A. False

Explanation

The atmosphere is a mixture of 78% nitrogen, 21% oxygen and 1% other gases.

Rate this question:

1

4.

Where in the body is insulin produced?

The liver
The pancreas
The thyroid gland
The spleen

Correct Answer

A. The pancreas

Explanation

Insulin is produced in the pancreas. The pancreas is an organ located in the abdomen, behind the stomach. It plays a crucial role in regulating blood sugar levels by producing and releasing insulin into the bloodstream. Insulin helps to control the amount of glucose in the blood and allows cells in the body to use and store glucose for energy.

Rate this question:

1

5.

Which of these does not affect photosynthesis?

Temperature
Light intensity
Rainfall
Chlorophyll

Correct Answer

A. Rainfall

Explanation

Rainfall does not directly affect photosynthesis. Photosynthesis is the process by which plants convert sunlight, carbon dioxide, and water into glucose and oxygen. While rainfall indirectly supports photosynthesis by providing plants with the water they need to carry out the process, it is not a direct factor that affects the process itself. Temperature, light intensity, and chlorophyll, on the other hand, directly impact photosynthesis. Temperature affects the rate of chemical reactions involved in photosynthesis, light intensity provides the energy needed for the process, and chlorophyll is the pigment that captures sunlight for photosynthesis to occur.

Rate this question:

6.

Approximately what is the pH of your stomach?

1-3
4-5
7
8-9

Correct Answer

A. 1-3

Explanation

The pH of the stomach is approximately 1-3. This level of acidity is necessary for the stomach to break down food and kill bacteria. The stomach produces hydrochloric acid, which helps in the digestion process. A pH of 1-3 is highly acidic, indicating a low pH level.

Rate this question:

7.

Which chemical element, number 11 in the periodic table has the symbol Na?

Nickel
Sodium
Iron
Silver

Correct Answer

A. Sodium

Explanation

Sodium is the chemical element with the symbol Na and atomic number 11. It is a highly reactive metal that is commonly found in salt compounds. Sodium is known for its role in maintaining fluid balance in the body and is essential for nerve and muscle function. It is commonly used in the production of various chemicals and is also a component of table salt.

Rate this question:

8.

Diamonds are a form of which chemical element?

Calcium
Platinum
Carbon
Sodium

Correct Answer

A. Carbon

Explanation

Diamonds are a form of the chemical element carbon. Diamonds are composed of carbon atoms that are arranged in a crystal lattice structure, giving them their unique properties such as hardness and brilliance. Carbon is the only chemical element that can form diamonds under the conditions of high pressure and temperature found deep within the Earth's mantle.

Rate this question:

9.

Which mineral forms the lead in a pencil?

Lead
Graphite

Correct Answer

A. Graphite

Explanation

Graphite is the correct answer because it is the mineral commonly used to make the lead in pencils. Despite its name, pencil "lead" is actually made of graphite, a form of carbon that is soft and easily leaves marks on paper. Graphite is a good choice for pencil lead because it has a layered structure that allows it to easily slide off onto the paper, making it ideal for writing and drawing.

Rate this question:

10.

Which is the longest bone in the human body?

The spine
The femur
The tibia
The humerus

Correct Answer

A. The femur

Explanation

The femur is the longest bone in the human body. It is located in the thigh and extends from the hip to the knee. The femur is responsible for supporting the weight of the body and facilitating movement. It is a strong and sturdy bone that plays a crucial role in the structure and function of the skeletal system.

Rate this question:

How Much Science Do You Know?

Which is the molecule symbol for methane?

Quiz Preview

Dry ice is a form of what?

The earth's atmosphere is 10% oxygen.

Where in the body is insulin produced?

Which of these does not affect photosynthesis?

Approximately what is the pH of your stomach?

Which chemical element, number 11 in the periodic table has the symbol Na?

Diamonds are a form of which chemical element?

Which mineral forms the lead in a pencil?

Which is the longest bone in the human body?