8th Grade Review

Front

What is the Pythagorean Theorem?

Back

The Pythagorean Theorem states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Formula: a² + b² = c².

Front

Define a fraction.

Back

A fraction represents a part of a whole and is expressed as a ratio of two integers, with a numerator (top number) and a denominator (bottom number).

Front

What is the difference between a mean and a median?

Back

The mean is the average of a set of numbers, calculated by adding them together and dividing by the count. The median is the middle value when the numbers are arranged in order.

Front

What is an ecosystem?

Back

An ecosystem is a community of living organisms (plants, animals, and microorganisms) interacting with their physical environment (air, water, soil) in a specific area.

Front

Explain the concept of gravity.

Back

Gravity is a force that attracts two bodies towards each other. It gives weight to physical objects and is responsible for the falling of objects towards the Earth.

Front

What is a variable in mathematics?

Back

A variable is a symbol (often a letter) that represents an unknown value in mathematical expressions and equations.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is the formula for the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length (l) by its width (w). Formula: Area = l × w.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

Explain the water cycle.

Back

The water cycle is the continuous process by which water evaporates from the Earth's surface, condenses in the atmosphere, and precipitates back to the surface as rain or snow.