Science STAAR

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

• Mass is directly proportional to force and acceleration according to Newton's second law of motion.

• Acceleration is directly proportional to force and inversely proportional to mass according to Newton's second law of motion.

• Force is inversely proportional to mass and acceleration according to Newton's second law of motion.

• Force is directly proportional to mass and acceleration according to Newton's second law of motion.

Explain the difference between potential energy and kinetic energy.

• Potential energy is energy in motion, while kinetic energy is stored energy.

• Potential energy is stored energy, while kinetic energy is energy in motion.

• Potential energy is always positive, while kinetic energy can be negative.

• Potential energy is the energy of motion, while kinetic energy is the energy of position.

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How does the process of photosynthesis contribute to the oxygen levels in the atmosphere?

• Photosynthesis consumes oxygen, reducing the levels in the atmosphere.

• Photosynthesis has no impact on oxygen levels in the atmosphere.

• Photosynthesis converts oxygen into carbon dioxide, depleting the atmosphere.

• Photosynthesis produces oxygen as a byproduct, increasing the oxygen levels in the atmosphere.

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

• The difference between a physical change and a chemical change is that a physical change does not alter the chemical composition of a substance, whereas a chemical change does.

• A physical change can only occur in solids, while a chemical change can occur in any state of matter.

• A physical change always results in the formation of a new substance, unlike a chemical change.

• A physical change involves a change in color, while a chemical change does not.

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What is the primary function of the chloroplasts in plant cells?

• To break down sugar molecules to release energy

• To store water and nutrients

• To capture light energy and convert it into chemical energy

• To control the entry and exit of substances in and out of the cell

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What is the term for the amount of matter in an object?

• Weight

• Density

• Mass

• Volume

What type of symbiotic relationship benefits one organism without harming the other?

• Mutualism

• Commensalism

• Parasitism

• Predation

Which of the following is a chemical change?

• Dissolving salt in water

• Boiling water

• Burning wood

• Melting ice

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What is the term for the movement of particles from an area of higher concentration to an area of lower concentration?

• Osmosis

• Diffusion

• Active transport

• Endocytosis

Describe the structure and function of DNA in living organisms.

• DNA is a single-stranded molecule with no specific base pairing

• DNA is a protein-based structure in living organisms

• DNA functions primarily as a source of energy in cells

• DNA is a double-stranded molecule made up of nucleotides containing genetic information. It forms a double helix structure with specific base pairing (A-T, C-G) and functions as the blueprint for cell building and maintenance.

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