What is the law of conservation of mass?

• Mass can be created out of nothing.

• Mass cannot be created or destroyed, only rearranged.

• Mass can be converted into energy without any limitations.

• Mass can be destroyed completely.

What are the products of the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH)?

• Water (H₂O) and sodium chloride (NaCl)

• Sodium hydroxide (NaOH) and hydrochloric acid (HCl)

• Hydrogen gas (H₂) and sodium hydroxide (NaOH)

• Chlorine gas (Cl₂) and sodium hydroxide (NaOH)

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 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.

What is the role of friction in force and motion?

• Friction has no impact on force and motion.

• Friction opposes motion and affects the amount of force needed to move objects.

• Friction accelerates motion and reduces the force needed to move objects.

• Friction always increases the speed of moving objects.

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 color of the wires used.

• The shape of the components.

• The temperature at which they operate.

What is the formula for calculating electrical power?

• P = V x I

• P = I / V

• P = V + I

• P = V / I

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

• Tissue

• Cell

• Molecules

• Organ

In which organelle does photosynthesis occur?

• Endoplasmic reticulum

• Nucleus

• Chloroplasts

• Mitochondria

What is the function of mitochondria in a cell?

• Regulates cell division

• Stores genetic material

• Synthesizes proteins

• Produces energy (ATP) through cellular respiration

The stomach secretes digestive enzymes. Why don't these enzymes digest the stomach itself?

• Protected with cilia

• Protected with villi

• Protected with mucous

• Presence of food