Test: Addition, Subtraction and Money - Year 3 MCQ

The primary function of red blood cells (erythrocytes) is to transport oxygen from the lungs to the body's tissues and return carbon dioxide back to the lungs for exhalation. These cells contain hemoglobin, a protein that binds oxygen and is crucial for cellular respiration.

A scalene triangle is defined as a triangle in which all three sides have different lengths. This distinguishes it from equilateral and isosceles triangles, which have sides of equal length or two equal sides, respectively.

Transpiration is the process through which water vapor is released from plant leaves into the atmosphere. This process helps in nutrient transport and temperature regulation in plants. Interestingly, transpiration plays a critical role in the water cycle by contributing to the moisture in the air.

The chemical formula for water is H2O, indicating that each molecule consists of two hydrogen atoms bonded to one oxygen atom. Water is essential for all known forms of life, serving as a solvent and medium for biochemical reactions.

The Sumerians developed cuneiform, one of the earliest systems of writing, around 3200 BC. This writing system, characterized by wedge-shaped marks on clay tablets, was used for various purposes, including record-keeping and literature.

Portuguese is the primary language spoken in Brazil, making it the largest Portuguese-speaking country in the world. The country’s diverse culture and history contribute to its unique variations of the language, including regional dialects and expressions.

The blue whale holds the title of the largest mammal in the world, reaching lengths of up to 100 feet (30 meters) and weighing as much as 200 tons. These magnificent creatures are filter feeders, primarily consuming small shrimp-like animals called krill.

The Titanic sank on April 15, 1912, during its maiden voyage after hitting an iceberg. The tragedy led to significant changes in maritime safety regulations, emphasizing the need for lifeboats and better communication protocols.

Tokyo is the capital city of Japan, known for its bustling metropolis, rich culture, and technological advancements. It is one of the most populous cities in the world and offers a blend of traditional and modern attractions.

The primary purpose of the United Nations (UN) is to maintain international peace and security. Established after World War II, the UN works to prevent conflicts, provide humanitarian aid, and promote human rights globally, making it a crucial player in international diplomacy.

"Romeo and Juliet," a tragedy about two young star-crossed lovers, was written by William Shakespeare. The play explores themes of love, fate, and family conflict, making it one of the most performed works in the history of literature.

Mars is commonly referred to as the Red Planet due to its reddish appearance, which results from iron oxide (rust) on its surface. It has been a focal point for exploration in the search for past or present life.

The chemical symbol 'Na' stands for sodium, derived from the Latin word 'Natrium'. Sodium is an essential element for life, playing crucial roles in nerve function and fluid balance in the body.

The main ingredient in traditional hummus is chickpeas (also known as garbanzo beans). Hummus is a popular Middle Eastern dip that is not only delicious but also rich in protein and fiber.

The liver plays a critical role in detoxifying chemicals and metabolizing drugs. It processes nutrients from the digestive tract and produces bile, which aids in digestion. The liver’s ability to regenerate makes it a vital organ for maintaining health.

Carbon dioxide is the primary gas utilized by plants during photosynthesis, where it is converted into glucose using sunlight. Oxygen is released as a byproduct. This process is vital for life on Earth, as it provides oxygen and organic compounds that are foundational to the food chain.

The cell membrane serves as a selective barrier that regulates the passage of ions and molecules into and out of the cell, maintaining homeostasis. This function is crucial for cellular communication and nutrient absorption. Interestingly, the fluid mosaic model describes the cell membrane's dynamic nature, highlighting its flexible structure and the presence of various proteins embedded within it.

Paris is the capital city of France, known for its rich history, culture, and landmarks such as the Eiffel Tower and the Louvre Museum. It has been a major center for art, fashion, and intellectual thought throughout history.

Mitochondria are often referred to as the powerhouse of the cell because they produce adenosine triphosphate (ATP), which is the energy currency of the cell. Mitochondria are unique in that they contain their own DNA and are involved in energy metabolism.

Albert Einstein is known as the father of modern physics, primarily for his theory of relativity, which revolutionized our understanding of space, time, and gravity. His famous equation, E=mc², has had profound implications in physics and cosmology.