8th grade New Staar Practice

Front

What is the formula for the area of a rectangle?

Back

Area = length × width

Front

Define 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

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. (a² + b² = c²)

Front

What is the difference between a variable and a constant in algebra?

Back

A variable is a symbol that represents an unknown value, while a constant is a fixed value that does not change.

Front

Explain the concept of a fraction.

Back

A fraction represents a part of a whole and is expressed as a numerator (top number) over a denominator (bottom number).

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac.

Front

Define the term 'ecosystem'.

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What is the law of supply and demand?

Back

The law of supply and demand states that the price of a good or service is determined by the relationship between its supply and demand.

Front

What is the difference between kinetic and potential energy?

Back

Kinetic energy is the energy of motion, while potential energy is stored energy based on an object's position or state.

Front

What is a hypothesis in scientific research?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.