Science Buddies: "Ask an Expert"

How does the mass/weight of a blunt force object affect the blood splatter pattern? Is this a good hypothesis for an 8th grade science project? I'm interested in doing a science project in the forensic science area.

Hi Kenzie,

It's great that you have found a topic you are interested in, and I think it's a perfectly fine subject for a science fair. I do have two questions/concerns, though.

1) "How does the mass/weight of a blunt force object affect the blood splatter pattern?" is not a hypothesis. It's a perfectly good topic/question, but a hypothesis is a testable prediction that should include your guess if what you think will happen. Try coming up with a hypothesis for your topic. For help, we have a page explaining hypotheses here at Science Buddies: https://www.sciencebuddies.org/science- ... esis.shtml

2) A good hypothesis has to be testable. So, do you have any thoughts on how you are going to test your hypothesis/question? I don't think you'll be able to use blood (or hitting people with different objects) as a part of your science fair project , so you'll need to come up with a model you can use. If you don't already have an idea, I'd try doing some web searches to see what other people have done.

Once you have a hypothesis and a model, you should be good to go with this topic. Let us know what you come up with, and we can help guide you with any more questions you may have!
JMP

Hi there,

I completely agree with JMP and the points he made. This sounds like a very interesting science project! To add to what JMP suggested, in terms of your hypothesis, how do you think the mass/weight of the blunt force object will affect the blood splatter pattern? There are two things you need to consider. First of all, if the blunt force object is heavier, what do you think will happen to the blood splatter? Second of all, when you do your experiments, how do you plan on "recording" your observations of the blood splatters? Are you going to take pictures to see what the splatters look like? Or are you going to come up with something you can measure? For example, are you going to estimate the area of the splatter? Are you going to measure how far the blood splatters from the object that was hit with the blunt force object? Those are all important things to consider as you are planning your experiment.

Let us know if you have anymore questions and we'd be glad to help you brainstorm!

Connie