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 cm3. D = m/V

What is an object with a density of 2.0 g/cm3?

(5.0 g)------------------------- = Density (g/mL) (2.5 cm3)

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/cm3?

(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)