Middle School Science UIL Tryouts

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³). It determines whether an object will float or sink in a fluid.

Front

Which substance is least dense and floats in water?

Back

Ice is less dense than water, which is why it floats.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

How do you determine the number of elements and compounds in a chemical equation?

Back

Count the unique symbols for elements and the groups of atoms for compounds in the equation.

Front

What is the principle of displacement in measuring volume?

Back

The principle of displacement states that the volume of an object submerged in a fluid is equal to the volume of fluid displaced.

Front

What is a hypothesis?

Back

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

Front

Can a hypothesis be proven true?

Back

No, a hypothesis can only be supported or rejected based on experimental evidence; it cannot be proven true.

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force, making it easier to perform work.

Front

How do simple machines help in lifting heavy objects?

Back

Simple machines require less force to lift heavy objects, allowing us to do the same amount of work with less effort.

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams (g) or kilograms (kg).