Volume (square objects, like a box)

Volume is the: amount of space something takes up.

FACTS ABOUT VOLUME MEASURMENTS: • Volume is found by multiplying three distances.

• Volume = (Length) x (Width) x (Height) • Units are also multiplied and become “ cubed ” 3 10 m 20 m Length = 10m Width = 10m Height = 20m 10 m (10m) X (10m) X (20m) = 2000m 3

Volume (liquid, like water in a cup)

FACTS ABOUT LIQUID VOLUME MEASURMENTS: • The unit for liquid volume is the Liter (L).

• Volume is found using a graduated cylinder.

• Units for small volumes are milliliters (ml).

You should always read a graduated cylinder at the bottom of the curve of the liquid. That curve is called the meniscus .

1 L = 1000 mL Common Conversions 50 40 30 20 0

Mass

Mass is the: amount of matter “ stuff ” something is made of.

will not change unless you add or take away matter.

Mass FACTS ABOUT MASS MEASURMENTS: • The unit for mass is the gram (g).

• Large masses are measured in kilograms (kg).

• A triple beam balance (NOT A SCALE) is used to measure mass.

1 kg = 1000 g Common Conversions

Weight

Weight is: how much gravity pulls on you or on any other object, such as a planet.

Gravity changes from one place to another and thus so does your weight.

25 Newtons

The more massive the object, the more it will pull on you...

You press down less on the scale.

AND THE HIGHER YOUR WEIGHT WILL BE.

MOON

1/6 the gravity 150 Newtons

EARTH

Density

Density is: how closely packed particles in a substance are.

Said another way, Density is: the amount of matter (mass) in a given space (volume).

Density = mass (g) volume (cm 3 ) m= 10g m = 10g v = 10cm 3 v = 2cm 3 d= 1g/cm 3 d= 5g/cm 3 LESS DENSE MORE DENSE

Density

Density = mass (g) volume (cm 3 ) FACTS ABOUT DENSITY MEASURMENTS: • Density is found by dividing a mass (g) or (kg) and a volume or (ml).

• Units must also be divided: Example: g/cm 3 . (cm 3 ) Mass = 20g Volume = 10cm 3 = 2g/cm 3

Density

Density = mass (g) volume (cm 3 ) • Given any two of these quantities (density, mass, or volume) you can find the other by either multiplying or dividing appropriately.

Density = 2g Volume = 10cm 3 = 20g Mass = ?

(2g) x (10cm 3 ) m d v Density Triangle