Properties of Change

The amount of energy needed to change any substance from a solid to a liquid (or vice versa) is known as:

• Heat of fusion

• Chemical property

• Physical change

• Basic research

Answer explanation

The heat of fusion is the energy required to change a substance from solid to liquid or vice versa. It specifically refers to the phase transition at the melting point, making it the correct choice.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A submicroscopic particle consisting of a group of atoms is called a:

• Condensation

• Molecule

• Gas

• Liquid

Answer explanation

A molecule is a submicroscopic particle made up of two or more atoms bonded together. It is the correct term for a group of atoms, distinguishing it from states of matter like gas and liquid.

Tags

NGSS.MS-PS1-1

Characterizes the ability of a substance to react with other substances or to transform from one substance to another:

• Chemical property

• Physical change

• Heat of fusion

• Basic research

Answer explanation

A chemical property describes how a substance interacts with others or changes into different substances, making it the correct choice for this question. Other options do not pertain to reactivity or transformation.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Matter that has no definite volume or shape is known as:

• Gas

• Liquid

• Molecule

• Condensation

Answer explanation

Matter that has no definite volume or shape is classified as a gas. Gases expand to fill their container, unlike liquids and solids, which have fixed shapes and volumes.

Tags

NGSS.MS-PS1-4

A change in which a substance changes one or more of its physical properties without transforming into a new substance is called:

• Physical change

• Chemical property

• Heat of fusion

• Submicroscopic

Answer explanation

A physical change involves a change in physical properties, such as shape or state, without altering the substance's chemical composition. Therefore, the correct answer is 'Physical change'.

A branch of scientific research that focuses on developing applications built upon the principles discovered through basic research.

• Applied research

• Theoretical research

• Experimental research

• Observational research

Answer explanation

Applied research focuses on practical applications derived from basic research principles, making it the correct choice for developing real-world applications.

Tags

NGSS.MS-ESS3-3

Matter that has a definite volume but no definite shape.

• Liquid

• Solid

• Gas

• Plasma

Answer explanation

A liquid has a definite volume but takes the shape of its container, unlike solids which have both definite shape and volume, gases which have neither, and plasma which is an ionized state of matter.

Tags

NGSS.MS-PS1-4

Melting butter.

• Physical change

• Chemical change

• Biological change

• Mechanical change

Answer explanation

Melting butter is a physical change because it alters the state of the butter from solid to liquid without changing its chemical composition.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Leaves changing color.

• Chemical change

• Physical change

• Biological change

• Mechanical change

Answer explanation

Leaves change color due to chemical changes in pigments, particularly chlorophyll, as they prepare for winter. This process involves the breakdown of chlorophyll and the production of other pigments, making it a chemical change.

What are the three main types of elements on the Periodic Table?

• Metals, metalloids, and nonmetals

• Metals, metallics, and gases

• Alkaline metals, transition metals, and noble gases

• None of the above

Answer explanation

The three main types of elements on the Periodic Table are metals, metalloids, and nonmetals. Metals are conductive and malleable, metalloids have properties of both, and nonmetals are generally poor conductors.