8th Grade Science STAAR Review

What is the basic unit of life in all living organisms?

• Tissue

• Organ

• Cell

• Organism

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which organelle is responsible for producing energy in the form of ATP in a cell?

• Nucleus

• Mitochondria

• Ribosome

• Golgi apparatus

Tags

NGSS.MS-LS1-2

Explain how the structure of the cell membrane contributes to its function.

• It is rigid and provides structural support.

• It is semi-permeable, allowing selective movement of substances.

• It is impermeable, preventing any substance from entering or leaving.

• It is a single layer that allows free movement of all substances.

Tags

NGSS.MS-LS1-2

Which of the following is a biotic factor in an ecosystem?

• Water

• Sunlight

• Temperature

• Plants

Tags

NGSS.MS-LS1-4

What is the primary role of decomposers in an ecosystem?

• To produce energy through photosynthesis

• To break down dead organisms and recycle nutrients

• To consume primary producers

• To compete with herbivores for food

Tags

NGSS.MS-LS2-3

Describe how energy flows through an ecosystem.

• Energy flows from consumers to producers.

• Energy flows from decomposers to producers.

• Energy flows from producers to consumers and then to decomposers.

• Energy flows in a circular pattern among all organisms.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is a chemical change?

• Melting ice

• Dissolving sugar in water

• Burning wood

• Breaking a glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the law of conservation of mass in a chemical reaction?

• Mass is created during a chemical reaction.

• Mass is destroyed during a chemical reaction.

• Mass is neither created nor destroyed during a chemical reaction.

• Mass is converted into energy during a chemical reaction.

Tags

NGSS.MS-PS1-5

Tags

NGSS.MS-PS1-5

Which of Newton's Laws of Motion explains why a person not wearing a seatbelt continues to move forward when a car suddenly stops?

• First Law of Motion

• Second Law of Motion

• Third Law of Motion

• Law of Universal Gravitation