Science UIL Practice 22-23 pt 1

Front

What is density?

Back

Density is the mass of an object divided by its volume. It determines whether an object will float or sink in a liquid.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it remains constant.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. They are the building blocks of matter.

Front

What are compounds?

Back

Compounds are substances formed when two or more elements chemically bond together in fixed proportions.

Front

What is the difference between an element and a compound?

Back

An element is a single type of atom, while a compound consists of two or more different types of atoms bonded together.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

Front

What is the effect of volcanic activity on climate?

Back

Large volcanic activity can release ash and gases into the atmosphere, which can lower temperatures and affect plant growth.

Front

What is the significance of bubbles in a liquid?

Back

Bubbles indicate a gas is being released during a chemical reaction, and they are less dense than the liquid.