Science Map

What is the main difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells are found only in multicellular organisms

• Eukaryotic cells are found only in unicellular organisms

• Eukaryotic cells have a nucleus and prokaryotic cells do not

• Prokaryotic cells have DNA and eukaryotic cells do not

Answer explanation

Eukaryotic cells have a nucleus and prokaryotic cells do not

A chemical change

• changes the physical properties of an object, but does not create a new substance.

• creates a new substance and cannot be undone.

Answer explanation

A chemical change creates a new substance and cannot be undone, distinguishing it from physical changes that do not create new substances.

Tags

NGSS.MS-PS1-2

A physical change...

• changes the physical properties of an object, but does not create a new substance.

• creates a new substance and cannot be undone.

Answer explanation

A physical change alters the physical properties of an object without creating a new substance, distinguishing it from a chemical change.

Is this an example of a physical or chemical change?

• physical

• chemical

Answer explanation

This is an example of a chemical change because it involves a change in the chemical composition of the substance.

Tags

NGSS.MS-PS1-2

Is this an example of a physical or chemical change?

• physical

• chemical

Answer explanation

This is an example of a physical change because it does not involve a change in the chemical composition of the substance.

Tags

NGSS.5-PS1-4

Is this an example of a physical or chemical change?

• physical

• chemical

Answer explanation

This is an example of a physical change because no new substances are formed, only the physical state of the matter changes.

Is this an example of a physical or chemical change?

• physical

• chemical

Answer explanation

This is an example of a chemical change because it involves a change in the chemical composition of the substance.

Tags

NGSS.MS-PS1-2

The process of changing from liquid to a solid is called...

• melting

• condensation

• melting

• freezing

Answer explanation

The process of changing from liquid to a solid is called freezing.

Tags

NGSS.MS-PS1-4

Liquids have definite ...

• odor

• volume

• shape

Answer explanation

Liquids have definite volume, meaning they take up a specific amount of space regardless of their shape or container.

A complete electrical circuit or path through which electricity or current can pass or flow

• open circuit

• circuit

• closed circuit

• current

Answer explanation

A closed circuit is a complete electrical path that allows electricity to flow. It is the correct choice as it describes the concept accurately.