Wednesday, 21 June 2017

Science Blog

Science Blog 19.6.17 Week 8
Introduction:What is force?

Push: A push is a force, so say when you throw an apple at a cup they both push from each other making neither of them move.

Pull: Pull is a force where you need to pull an object to make it move, you are always using the force called pull, you pull open a drawer, you pull the rope in tug of war, there are so many ways that you can use the force pull that it would take a decade to write them all down.

Acceleration: Acceleration is where you make an object go faster by pushing or pulling, such as when you have a toy car, you push it to accelerate to make it go fast.

This session me and my partner Alex were gathering, collecting, and observing data on what happened if we added two cotton balls to one cotton ball, what happened was it went very high but very short, this is because if an object weighs more it will come down faster, if an object is lighter, and it is very hard to predict how far the cotton ball will go, the opposite of weighing a lot is when the object is lighter, but when it's a light cotton ball it is more likely to go very short and it doesn't even come close to going high.

A variable was me and Alex kept changing the weight, every time we flung the cotton ball it would either go further or shorter because of the weight difference, also every time we flung it (we flung the cotton ball eleven times) we placed another rubber band around the three cotton balls, we started with no rubber bands, put one rubber band around it after, then we flung it again, then we put another rubber band around it and so on.

I can use this new knowledge for the future because when I go to intermediate I will know what a force is/what forces do, and most importantly I will know how a force works. Also I can use this new learning by knowing facts and how a force works for the next time I do an activity similar to this one/our new task making a balloon powered vehicle, a game using force/forces, and a model playground using force, I chose the balloon powered boat, so I can also use this new learning for that as well because it would help me to complete the section “how does it use force?” and i would be able to describe the forces in detail.

I wonder what would happen if I were to place more than ten rubber bands around the three cotton balls, would it go far or short?

This activity uses force because when you bend the spoon down to launch the cotton balls you are actually pulling the spoon back, also the spoon uses the push force because when it launches the spoon pushes the cotton ball and makes the cotton ball launch.

Also here are some photos of my catapult.

This is my catapult before I made a change to it, I took both of the extra parts at the back off because I think they disturbed the balance between the catapult and the parts meaning that the cotton ball would not go as far.

Here is the catapult after I took the parts off, it worked better than before, I think that is because there is less weight put on the catapult therefore the catapult is able to fling easier without having more weight on it and making the cotton ball gradually come down faster when you fling it.

Science Blog 12.6.17 Week 7

What I've done: I did the catapult this week,we were gathering and collecting data about how far the cotton ball would go, the first time we would put no rubber bands on the cotton ball and then the second time you put one rubber band on it and so on.

What I found out: I thought that if you put more rubber bands on the cotton ball, the cotton ball would go further,but when I started putting 6 and then 7 rubber bands on, the cotton ball seemed to go really high but short, but when I started getting into 4 and then 5 it started going really long and short, I think the gravitation pulls the cotton ball hard when the cotton ball has more weight on it and it goes really high it’s like a life sized catapult shooting a cannon ball it would go high but very short because of the gravitational pull.

What I wonder:I wonder if gravitation is all about weight and the gravitation pulls harder when the object that is being shot weighs more.

Science Blog 7.6.17 Week 6

What I've done: I did ping pong ramp, ping pong ramp is where you make a ramp out of resources like books and highlighters.

What I found out: I found out that if you put the ruler lower to the ground the marble would go longer but lower and when you put the ruler up high the marble goes higher but shorter.

What I wonder: I wonder if the marble would go really long if we put a ramp in front of the ruler or would it just go higher?

 Science Blog 31.5.17 Week 5

What I've done:I did the rocket balloon, rocket balloons is when  you have a straw and a piece of string and a balloon, first of all you blow up the balloon untill it's about halfway to its full size then you tape the end of the balloon to the straw. then you put the straw in the string and you take the string and put it on either side of a wall. next you pull the straw to one end of the striNg, and then you untangle the knot on the balloon and it goes up!

What I found out: I found out that if you blow the balloon bigger it will go longer but it won't blow for as long for some reason. Also I found out that if the string is higher the balloon will go fast but stop quickly.
What I wonder: I wonder if the balloon was small would it go far or short?
Science Blog 25.5.17

What I did: I did the basketball bounce, I was mostly examining the way that the ball pushes off the ground harder when you throw it on the ground harder and then the other way round if you throw the ball lightly.

What I found out: I found out that there was pressurised air inside the ball and that was the whole reason the ball came back up when you bounced it because the pressurised air inside the ball makes it bouncy.

What I wonder: what would happen if there was no pressurised air inside the basketball, would it still bounce or would it not?

No comments:

Post a Comment