# Unit 3 Jeopardy Calculations and problem solving..

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Unit 3 Jeopardy Calculations and problem solving.

Numerator What do you find on the top of a fraction? What do you always multiply?

Denominator What do you find on the bottom of a fraction? What do you always divide?

Conversion factor. What is used to convert from one unit to a different unit. What is an equality?

____ km = 3000 mm What is 0.003 km? (3000m) (0.001 km) ---------------------------- (1000m) (3000mm) (1 km) (1 m) ---------------------------- (1000m) (1000 mm)

____ kg = 3000 g What is 3 kg? (3000g) (1 kg) ---------------------------- (1000g)

____ kg = 3000 g What is 3 kg? (3000g) (1 kg) ---------------------------- (1000g)

____ inches = 2.54 cm What is 1.00 inch? (2.54 m) (1.00in.) ---------------------------- (2.54 cm)

____ inches = 2.54 m What is 100 inches? (2.54 m) (100 cm) (1.00in.) ------------------------------------- (1 m) (2.54 cm)

An object weighs 5.0 g and has a volume of 2.5 cm 3. D = m/V What is an object with a density of 2.0 g/cm 3 ? (5.0 g) ------------------------- = Density (g/mL) (2.5 cm 3 )

An object weighs 5.0 g and when placed in 20.0 mL of water changes the volume to 22.5 mL. D = m/V What is an object with a density of 2.0 g/cm 3 ? (5.0 g) ------------------------- = Density (g/mL) ((22.5 – 20.0) mL)

An object weighs 5.0 g and when placed in and has a density of 1.0 g/mL. A student uses D = m/V for her calculations. What is an object with a volume of 5.0 mL (5.0 g) ( mL) ------------------- = Volume (mL) (1.0g)