# Data Handling

This collection of STEM resources is based around the topic of data handling. Resources are listed in order of stage.

### Observing the Sun and the Moon

##### Stage: 2 and 3 Challenge Level:

How does the time of dawn and dusk vary? What about the Moon, how does that change from night to night? Is the Sun always the same? Gather data to help you explore these questions.

### Troublesome Triangles

##### Stage: 2 and 3 Challenge Level:

Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple simulation game to investigate the properties of such systems.

### Bird Watch

##### Stage: 2 and 3 Challenge Level:

Do you know which birds are regular visitors where you live?

##### Stage: 2 and 3 Challenge Level:

What shape and size of drinks mat is best for flipping and catching?

### Avalanche!

##### Stage: 2 and 3 Challenge Level:

Investigate how avalanches occur and how they can be controlled

### Helicopters

##### Stage: 2, 3 and 4 Challenge Level:

Design and test a paper helicopter. What is the best design?

### Reaction Timer

##### Stage: 3 Challenge Level:

This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.

### Terrariums

##### Stage: 3 Challenge Level:

Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.

### Investigating Epidemics

##### Stage: 3 and 4 Challenge Level:

Simple models which help us to investigate how epidemics grow and die out.

### Using the Haemocytometer

##### Stage: 4 Challenge Level:

Practise your skills of proportional reasoning with this interactive haemocytometer.

### How Do You React?

##### Stage: 4 Challenge Level:

To investigate the relationship between the distance the ruler drops and the time taken, we need to do some mathematical modelling...

### Counting Dolphins

##### Stage: 4 Challenge Level:

How would you go about estimating populations of dolphins?

### Solving the Genome Puzzle

##### Stage: 4 and 5

The human genome is represented by a string of around 3 billion letters. To deal with such large numbers, genome sequencing relies on clever algorithms. This article investigates.