Starter Activity: Logical Thinking Use the 12 evidence cards that you have been given to help you solve this problem. A B C D E F G H The measuring cylinder.

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Presentation transcript:

Starter Activity: Logical Thinking Use the 12 evidence cards that you have been given to help you solve this problem. A B C D E F G H The measuring cylinder on the right has eight different liquids in it. You have a copy of this measuring cylinder in your exercise book. Your task is to use the twelve evidence cards to decide on the name of each of the eight liquids. To help you complete this activity: Lighter liquids will float on top of heavier ones. The cards on your table show what happens when two of these liquids are placed in the same beaker. In each case, one will float and one will sink. Looking at all of the evidence on the cards, combine this together to logically deduce which liquid is which. AnilineWater Crude Oil Milk Olive Oil Coconut Oil Petrol (gasoline) Sea Water

Starter Activity: Logical Thinking Use the 12 evidence cards that you have been given to help you solve this problem. A B C D E F G H Petrol Olive Oil Crude Oil Coconut Oil Pure Water Aniline Sea Water Milk

What can you tell me about these four diagrams?

WALT: We Are Learning To In the lesson today, we will learn… What density is and how it is related to floating and sinking. Keywords WILF: What Im Looking For By the end of the lesson, I would like you to be able to… Measure the density of a regular shaped object. Remember the calculation needed to work out density. Use ideas from the particles topic to explain density. Use a materials density to decide if an object will float or sink. Density Particles Volume Mass Archimedes

Working out the Density of different materials To work out the density of any particular material, you need two different pieces of information. These are: How much stuff there is in the material (measured in g) How much space the material takes up (measured in cm 3 ) To work out the density of a material, you do the following calculation:

Working out the Density of different materials Measured in g Measured in cm 3 Measured in g/cm 3 Measured using scales Measured using a ruler Find out the width, the length and the height Multiply these together

Working out the Density of different materials 1cm x 1cm x 1cm = 1cm 3 1cm x 5cm x 1cm = 5cm 3 1cm x 4cm x 2cm = 8cm 3 2cm x 3cm x 2cm = 12cm 3

Working out the Density of different materials 10cm x 5cm x 7cm = 350cm 3 7cm 10cm5cm

Working out Density You will be given a set of different materials. For each one, you will need to work out the density. Record your results in a table like the one below: MaterialMass (g)Volume (cm 3 )Density (g/cm 3 ) Plastic Stone Lead Aluminium Brass Copper Polystyrene Use these results to rank the materials in order of most dense to least dense.

I want to find out the density of this rock…..

Working out the volume of an irregular object Stage 1Stage 2Stage 3

Floating or Sinking? Density of Water is 1g/cm 3 Density of Bone is 1.8g/cm 3 Density of Cork is 0.24g/cm 3 Density of Cork is 3.01g/cm 3 Density of Ice is 0.90g/cm 3 Density of Ice is 0.77g/cm 3