12 multiplied by 3 equals 36. Multiplication is repeated addition, and adding 12 three times results in 36.

Mars is called the Red Planet due to its reddish appearance from iron oxide on its surface. This is a well-known fact in basic astronomy.

The word 'dog' names an animal and is therefore a noun. Nouns represent people, places, things, or ideas.

George Washington served as the first President of the United States. His leadership and legacy are key parts of American history.

The Pacific Ocean is the largest ocean on Earth, covering a significant portion of the planet's surface. Its vast size influences global weather and marine life.

Fifty percent is equivalent to one-half because 50 out of 100 simplifies to 1/2. This conversion is a basic skill in understanding percentages and fractions.

Photosynthesis is the process by which plants convert sunlight, water, and carbon dioxide into glucose and oxygen. It is essential for life on Earth and a fundamental concept in biology.

Subtracting 5 from both sides yields 2x = 12, and dividing by 2 results in x = 6. This linear equation requires basic algebraic manipulation to isolate the variable.

The sentence with commas separating each item in the list is punctuated correctly. Proper punctuation in lists is important for clarity in writing.

The assassination of Archduke Franz Ferdinand set off a chain of events leading to World War I. This event is widely recognized as one of the key triggers for the conflict.

Water is composed of two hydrogen atoms and one oxygen atom, which is denoted by the chemical formula H2O. This is a fundamental concept in basic chemistry.

The area of a rectangle is found by multiplying its length by its width. Doubling the length and tripling the width results in an area that is 2 x 3 = 6 times larger than the original.

The Great Barrier Reef is located off the coast of Australia and is the largest coral reef system in the world. It is recognized globally for its rich marine biodiversity.

The word 'bright' is an adjective that describes the noun 'sky.' Adjectives add detail and help the reader visualize the noun more clearly.

Julius Caesar was a pivotal figure in Roman history, and his actions helped shape what would become the Roman Empire. Understanding the influence of Rome is essential in the study of ancient history.

Rearranging the equation by subtracting 3x from both sides gives -2 = x + 1. Subtracting 1 from both sides results in x = -3, demonstrating the process of isolating the variable.

Newton's First Law, also known as the law of inertia, states that an object will continue moving at a constant speed in a straight line unless a force acts on it. This principle is fundamental in classical mechanics.

The printing press made it possible to disseminate ideas quickly and widely, fueling the spread of knowledge during the Renaissance. Its invention is considered a major milestone in human history.

Personification assigns human traits to inanimate objects or abstract ideas, enriching the narrative with vivid imagery. This literary device helps readers relate to non-human subjects in a more familiar way.

The car's speed is 150 km divided by 3 hours, which equals 50 km per hour. Multiplying this speed by 5 hours gives a distance of 250 km, assuming the speed remains constant.