Measuring Volume

What is volume? volume – the amount of space something fills the volume of solids are commonly measured in cubic centimetres (cm3) or cubic meters (m3) the volume of liquids (or gases) are often measured in litres (l) or millilitres (ml) 1 ml = 1 cm3 1,000 ml = 1 litre

Finding the Volume of a Regular Solid regular solid – an object that has a structure that follows a set pattern, such that it has set angles (90 degrees for example) between its edges and faces the volume of regular solids with edges and faces that are square (such as a cube or a rectangular solid) is found by multiplying the height by the length by the width

Finding the Volume of a Regular Solid 10 cm 10 cm 10 cm Volume = height x length x width Volume of this cube = 10 cm x 10 cm x 10 cm = 1,000 cm3

Finding the Volume of a Regular Solid 4 cm 10 cm 2 cm Volume of this rectangular solid = 4 cm x 2 cm x 10 cm = 80 cm3

Other Common Regular Solids pyramid cylinder cone

Finding the Volume of a Liquid you can find the volume of a liquid by pouring it into a measuring cylinder or measuring cup read the volume from the scale by keeping your eye at the level of the water and reading the lower level of the water (called the meniscus)

Finding the Volume of a Liquid it is important that the measuring cylinder is on a flat, level surface

Finding the Volume of an Irregular Solid irregular solid – an object that does not have straight edges or set angles example: stone

Finding the Volume of an Irregular Solid we can find the volume of an irregular solid by using our knowledge of volume of a liquid first, place enough water in a graduated cylinder to cover the object and make a reading of the volume next, place the object in the cylinder read the new level of the water the volume of the object by subtracting the first volume reading from the second volume reading

Finding the Volume of an Irregular Solid example: first reading: 200 ml second reading: 260 ml volume = second reading – first reading volume = 260 ml – 200 ml volume = 60 ml

What you have learned Copy and complete these sentences using these key words (cubic centimetre, cubic metre, irregular, millilitres, regular, volume): An object’s is the amount of space it fills up. Two units of volume are and . Liquid volumes are often measured in litres or . The volume of a solid is found by multiplying its height by the length by the width. The volume of an solid can be found by measuring the volume of water it displaces.