Q2 Science Practice Assessment

Front

What happens to the reaction rate of a chemical reaction when the temperature increases?

Back

The reaction rate increases because faster moving particles come in contact more often, which gives more chances for a reaction to happen.

Front

What is an example of a chemical change when a candle is lit?

Back

The wick burning is an example of a chemical change.

Front

What is the smallest unit of matter?

Back

The smallest unit of matter is an atom.

Front

What can you predict from an element’s location in the Periodic Table?

Back

You can predict its physical properties.

Front

What evidence fails to support the hypothesis that laundry detergents cannot remove grass stains?

Back

The stain is removed when a different type of laundry detergent is used.

Front

Define a chemical change.

Back

A chemical change is a process where substances combine or break apart to form new substances.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the role of temperature in chemical reactions?

Back

Temperature affects the energy and movement of particles, influencing the rate of chemical reactions.

Front

What is an atom?

Back

An atom is the basic unit of a chemical element, consisting of protons, neutrons, and electrons.

Front

What information does the Periodic Table provide about elements?

Back

The Periodic Table provides information about the elements' atomic number, symbol, and physical and chemical properties.