My challenge for you is to undertake an angle investigation.

Watch my video to see how.

To investigate angles in natural and manmade environments.  

Complete the angle survey worksheet using tallies for the two environments.

What you will need:
Your hand
Angle investigation results table.
Ruler
Protractor

How to do it:
Find a tree.
Use your hand with finger and thumb sticking out. This is your angle finder.
Measure the height up the tree until you get to a branch with your ruler.
Write that height down in the first column of the results table in meters.
Next using your angle finder see if the angle between the trunk and the branch is acute, less than 90o, right angle, 90o, or obtuse, greater than 90o. Then tally in the results table other column for that angle type.
If you want to actually measure the angles instead of just categorising them into the type then you can do that. You can try to use a protractor, or estimate using your 90o angle finder. Then write that angle down in the second column.
Next measure to the next branch, make sure you measure from the base of the tree to the next branch. Then measure the angle or tally the type of angle.
Continue this for as many branches as you like. If you can’t reach the branch then you may have to estimate the height – look at my video on measuring height to help.

Once you have all your results you can graph your results to see is there is a relationship between the height of the tree and the angle.

If you have measured the angle then use the first graph outline on the worksheets. If you have tallied the type of angle then use the second graph outline.

For both graphs the height of the tree is along the bottom, the X axis, as this is the variable we are choosing to change.
For the types of angle, plot the results for one type of angle in one colour and then plot a different set of plots in a different colour.
Draw a line with a ruler going through the middle of your plots trying to get half the dots on one side of the line.

To answer the question -What is the relationship between the height up a tree and the angle of the branches to the trunk?
Look at the shape of the graph.
Compare to the picture below.
Do any of these graphs look like your graph? It may not be exactly the same.

I would love to see your results and what your conclusions are so please share ant graphs or pictures on twitter #Naturedays @DawnNaturedays