Hidden Figures Practice Quiz Answer Key

Multiplying 7 by 8 yields 56. This fundamental multiplication fact is essential for building arithmetic skills.

Dividing both sides of the equation by 2 gives x = 5. This simple algebraic operation reinforces the concept of isolating the variable.

The Sun provides the majority of the energy received on Earth in the form of light and heat. This basic fact is central to understanding energy flow on our planet.

The perimeter of a square is calculated by adding up all four sides, so 4 x 4 cm equals 16 cm. This question applies the basic formula for the perimeter of a geometric shape.

There are 100 centimeters in 1 meter according to the metric conversion system. Understanding such conversions is crucial for measurement in science and mathematics.

First, add 6 to both sides to obtain 4x = 16, then divide by 4 to find x = 4. This reinforces the basic steps used in solving linear equations.

Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas. This basic scientific fact is key in studies of atmospheric science.

The area of a triangle is calculated using the formula 1/2 × base × height; substituting gives 1/2 × 10 × 5 = 25 cm². This exercise strengthens understanding of geometric area calculations.

A standard incandescent bulb converts electrical energy into light energy, with some energy also lost as heat. This demonstrates the concept of energy transformation in everyday devices.

The circumference of a circle is calculated by multiplying the diameter by π. Using 8 cm for the diameter gives approximately 25.1 cm when multiplied by 3.14.

By substituting x = 4 into the function f(x) = 2x + 3, we get f(4) = 2(4) + 3 = 11. This tests the ability to evaluate linear functions.

Gravity is the force responsible for pulling objects toward the Earth's center. Recognizing this force is a fundamental concept in physics.

H2O is the chemical formula for water, one of the most basic compounds in chemistry. This question reinforces knowledge of chemical formulas.

Photosynthesis is the process by which plants use sunlight to produce chemical energy. This key biological process is essential for the survival of most ecosystems.

Calculating 3/4 of 100 yields 75. This question reinforces understanding of fractions and percentage calculations.

Expanding the left side gives 2x - 6 = 4x + 6. Rearranging the equation and solving for x results in x = -6, demonstrating careful algebraic manipulation.

Tungsten is renowned for its high melting point and is widely used in light bulb filaments. This question connects material properties with their practical applications in technology.

The slope of a perpendicular line is the negative reciprocal of the original slope. Thus, for a line with a slope of 1/2, the perpendicular slope is -2.

A hexagon has 6 sides, so using the formula (n - 2) × 180 gives (6 - 2) × 180 = 720°. This formula is a key concept in understanding polygon properties.

The limiting reagent is the reactant that is entirely consumed first, thereby determining the maximum amount of product produced. Recognizing this concept is essential in stoichiometry and chemical reactions.