2. "Clip art licensed from the Clip Art Gallery on DiscoverySchool.com"

3. Craters are caused by the impacts of asteroids, meteors or other moving things in space hitting the surface of the moon. They are all different sizes and travel at different speeds. "Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" There are lots of craters in the picture, all different sizes. How do you think they were created? You’ve got one minute to discuss with your partner and then share it with the class. Click here to start the 1minute timer. 1 minute Click here to check.

4. Click here to see a video of crater making in sand " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" When landing on the moon craters are a problem. Will one leg of your landing pod go down a crater? Do all these craters mean the pod will sink in the soft ground and make its own crater? Scientists needed to know more about craters and how they were formed so they could make predictions about how the pod would land. When landing on the moon craters are a problem. Will one leg of your landing pod go down a crater? Do all these craters mean the pod will sink in the soft ground and make its own crater? Scientists needed to know more about craters and how they were formed so they could make predictions about how the pod would land. Could we draw any real conclusions doing it this way? Give reasons for your answer. Have a class vote. Could we draw any real conclusions doing it this way? Give reasons for your answer. Have a class vote. Yes No

5. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" Brilliant You’re correct it’s not a fair test. There are lots of different variables - rocks of any size have been thrown in the sand - sometimes they are thrown and sometimes dropped There is no record of what has been found so how can you come to any conclusions.

6. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" Oops It’s not a fair test. There are lots of different variables - rocks of any size have been thrown in the sand - sometimes they are thrown and sometimes dropped There is no record of what has been found so how can you come to any conclusions.

7. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" How can we make a fair test in the classroom? Firstly – What would you need? Secondly – What could you do? Work in a small group and come up with a method. You have 2 minutes. Share with the class. Click here to start the 2 minute timer. 2 minutes Click here to check.

8. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" I’m sure you had lots of great ideas but you definitely need something like sand to create a crater in and something like a marble to make a crater. Dropping the marble (or other object) into the sand (or other material) is one way to make a crater. Click here to see a video of some children carrying out the test. Click here to see a video of some children carrying out the test.

9. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com"

10. You’ve seen the investigation and now you’ve got 2 minutes to list all the variables – things that can change. Click here to start the 2 minute timer. 2 minutes Do they match my list? Click here.

11. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" My list of variables – (things that can change) The container the material is in The weight of the object you drop The shape of the object you drop The height you drop the object from The depth of the material you make the crater in The object you drop The material you make the crater in The size of the crater Now you can plan a fair test.

12. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" Drag and drop the variables into the correct place on the planning table. I am going to change (independent variable) I am going to measure (dependent variable) To make it a fair test I am going to keep these the same: Click on the variable (do not hold the button down) and drag it to the position you want and click again. The height you drop the object from The height you drop the object from The material you make the crater in The material you make the crater in The weight of the object you drop The weight of the object you drop The size of the crater The size of the crater The container the material is in The container the material is in The shape of the object you drop The shape of the object you drop The depth of the material you make the crater in The depth of the material you make the crater in The object you drop The object you drop

13. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com" Good luck. You’re now almost ready for blast off but you have some decisions to make first. What range of heights will you drop the object from? Do you make the changes regular e.g every 10cm? Do you make more than one measurement at each stage and why? How are you going to accurately measure the crater? How are you going to record the measurements? How are you going to display them afterwards? What are your success criteria for having successfully completed the investigation? Back to Start

14. " Clip art licensed from the Clip Art Gallery on DiscoverySchool.com"

15. Open ‘The Magic PowerPoint’ (Click enable macros if asked) Click Insert Click Slides from Files Click Browse and then on your chosen ppt Tick Keep Source Formatting Click Insert All Click slide sorter view Delete all the Magic PowerPoint slides except this one. Click save as and rename your PowerPoint Instructions: