Question

1. which of the following is a base si unit? a) liter b) kelvin c) gram d) cubic centimeter
2. the si unit for volume is: a) liter (l) b) cubic meter (m³) c) milliliter (ml) d) cubic centimeter (cm³)
3. which derived unit represents density? a) kg/m² b) kg/m³ c) m/s² d) j/kg
4. which tool is commonly used to measure liquid volume? a) triple beam balance b) ruler c) graduated cylinder d) thermometer
5. the density of an object is defined as: a) mass × volume b) volume ÷ mass c) mass ÷ volume d) mass + volume
6. if a rock displaces 45 ml of water in a graduated cylinder, its volume is: a) 45 g b) 45 cm³ c) 4.5 l d) 0.045 m³
7. an object has a density less than 1.0 g/cm³. when placed in water, it will: a) sink b) float c) dissolve d) evaporate
8. the si unit for the amount of substance is: a) gram b) mole c) liter d) joule
9. which of the following is not a base si unit? a) meter b) kilogram c) liter d) second
10. the method of finding volume by submerging an object in water is called: a) titration b) water displacement c) sublimation d) filtration

Explanation:

1. Kelvin is a base SI unit for temperature. Liters, grams, and cubic - centimeters are not base SI units.
2. The SI unit for volume is the cubic meter. Liters, milliliters, and cubic centimeters are non - SI or derived volume units.
3. Density is mass per unit volume, so the unit is kg/m³.
4. A graduated cylinder is used to measure liquid volume. A triple - beam balance measures mass, a ruler measures length, and a thermometer measures temperature.
5. Density is defined as mass divided by volume.
6. 1 mL is equal to 1 cm³, so if a rock displaces 45 mL of water, its volume is 45 cm³.
7. If an object has a density less than that of water (1.0 g/cm³), it will float.
8. The SI unit for the amount of substance is the mole.
9. The liter is not a base SI unit. Meters, kilograms, and seconds are base SI units.
10. The method of finding volume by submerging an object in water is called water displacement.

Answer:

1. b) Kelvin
2. b) Cubic meter (m³)
3. b) kg/m³
4. c) Graduated cylinder
5. c) Mass ÷ Volume
6. b) 45 cm³
7. b) Float
8. b) Mole
9. c) Liter
10. b) Water displacement