Grade 9 Science Quiz

What is the basic structural and functional unit of all living organisms?

• molecule

• cell

• tissue

• organ

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NGSS.MS-LS1-2

NGSS.MS-LS1-1

NGSS.MS-LS1-3

In which organelle does photosynthesis occur?

• endoplasmic reticulum

• mitochondria

• nucleus

• chloroplasts

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NGSS.MS-LS1-6

What type of reaction occurs when two or more substances combine to form a new substance?

• Mechanical reaction

• Physical reaction

• Biological reaction

• Chemical reaction

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the law of conservation of mass?

• Mass can be created out of nothing.

• Mass can be destroyed completely.

• Mass cannot be created or destroyed, only rearranged.

• Mass can be converted into energy without any limitations.

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NGSS.MS-PS1-5

What is the difference between a food chain and a food web?

• A food chain is linear, while a food web is interconnected.

• A food chain is more complex than a food web.

• A food chain is circular, while a food web is linear.

• A food chain involves only producers and consumers, while a food web includes decomposers.

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NGSS.MS-LS2-2

What is the role of producers in an ecosystem?

• Producers have no impact on the ecosystem.

• Producers are responsible for regulating the climate in the ecosystem.

• Producers consume energy from other organisms in the ecosystem.

• Producers create food through photosynthesis or chemosynthesis, providing energy for the ecosystem.

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the SI unit of electric current?

• C

• D

• B

• A

What is the difference between series and parallel circuits?

• The main difference between series and parallel circuits is how components are connected and how current flows through them.

• The shape of the components

• The temperature at which they operate

• The color of the wires used

What is the relationship between force, mass, and acceleration according to Newton's second law of motion?

• The relationship between force, mass, and acceleration is given by the formula F = ma.

• Mass is directly proportional to acceleration and force.

• Force is inversely proportional to mass and acceleration.

• The relationship between force, mass, and acceleration is F = m/a.

Tags

NGSS.MS-PS2-2

What is the difference between dominant and recessive alleles?

• Dominant alleles skip generations, while recessive alleles are always present.

• Dominant alleles are expressed over recessive alleles in an individual's phenotype.

• Dominant alleles are only found in males, while recessive alleles are only found in females.

• Recessive alleles are always more common than dominant alleles.