Our lung capacity investigation in Year 4

As we are learning about the human body, we completed an investigation to see if we could measure our lung capacity. We also investigated if physical activity could change our lung capacity.

We began by blowing into a balloon with just one exhale of breath. We measured the balloon with a partner and repeated this. We used this information to work out the volume of air that our lungs can hold.

We then repeated this activity of exhaling a breath into a balloon and measuring but first we had to run on the spot for 30 seconds. We did this 3 times and then we were exhausted!

We found that our lungs could hold more air when we were relaxed compared to after we had completed physical activity. We decided this was because when we are relaxed we can breathe in longer, bigger breaths. When we have done physical activity our lungs take in smaller breaths so that they can quickly get enough air into our bodies to send oxygen to our muscles where it’s needed.

We used this investigation as an opportunity to develop how we predict and interpret our results – we all made predictions about when our lungs could hold more air and even though we weren’t all right, we learnt that it’s ok to not be right when we predict as long as we learn something from our results.

We have really enjoyed the opportunity to explore so many different areas of science thanks to our topic and Science Week!

Year 4 Science Week activity with Reception

Year 4 went down to Reception to talk about the heart and exercise. We went into the playground to do 5 activities to see if our heart rate changed.

We worked in groups and the children had to do skipping, star jumps, running on the spot, hula hooping and throwing and catching. They had to do each activity for one minute. The Reception children went round the circle of activities in twos. All of the children worked really hard and enjoyed it!

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We went back into Reception’s classroom to talk to them about how they felt after the activities. Most of them said they felt tired and one of them said they felt better after the activity. We explained to Reception that when you exercise your heart beats faster to get blood around your body and you breathe more to get more air to your lungs.

We enjoyed teaching Reception about the heart and exercise, we think Reception would enjoy it if we did the activity again.

By Year 4

Year 4 – testing our brains for Science Week!

For Science Week we have been testing our brains to see how they handle mixed messages. We used a Stroop test to do this.

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This is an example of a Stroop test.

 

 

We had to complete 2 activities. First we read the words on the card and a partner timed how long it took us. Then we had to say the colours of the words on the cards and a partner timed how long it took us. Before we started we all made predictions about which would be easier to do: read the words or say the colours. We didn’t all agree…some of us thought it would be easier to read the words because we know the words and others thought the colours would be easier because you didn’t really have to do any reading. Have a look at our pictures and then our results are below.

 

 

We found that the Stroop test was actually quite hard to do! We found it much easier to say the words we could see than to say the colours of the words. Some of us could say the words in around 12 seconds but it took nearly 30 seconds to say the colours. We think this is because our brain has to work harder to work out what it needs to say and gets a bit confused when trying to work out the colours and avoid saying the word it can see.

We really enjoyed testing our brains though and we are excited that we have more investigations to do this week!

Sketching self-portraits Year 4

In Year 4 we have been exploring how to complete a self-portrait. We spent time looking at our faces closely in the mirror, remembering to keep look even when we were sketching.

We completed a few self-portraits, some sketched and some in colour. We then chose our favourite self-portrait so please take a look at them below:

We still have lots more work to do on self-portraits and we will look at different styles of self-portraits. This week we will start to look at some of Picasso’s work and see what inspiration we can get from his art.

 

Genes by Year 4

Today we learnt about genes. Dr Fry came in to see us to tell us about genes.

Genes are kept in ‘libraries’ in your body. They can make us look different. Our genes make us who we are. We get our genes from our parents. Your genes decide your hair colour, skin colour, eye colour, if you’re tall or short. Scientist can read what your genes say. We can’t see our genes through a microscope. We share our genes with our families, so we look similar to our families. The further away the relation the less we are likely to look like them.

We learnt about chromosomes and what they look like. Our chromosomes are in pairs. We found out boys have a Y chromosome but girls don’t, they have 2 X’s. The chromosome pairs are shaped in a twist and the pictures we see of them are what artists think they look like.

We learnt that genes can causes things like colourblindness. 1 in 12 boys can have red-green colourblindness and 1 in 200 girls can have red-green colourblindness. There are more boys with this colourblindness because girls have 2 X chromosomes that can replace the problem gene. Genes can cause diseases. Genes can make you have less fingers and thumbs or more fingers and thumbs, if you have an extra finger it’s most likely to happen on your pinky finger.

Some people put jellyfish DNA into mice to make them glow in the dark. Some of us thought this was good but not all of us think this is a good idea to do. ‘Frankenstein food’ is food that’s had its genes changed. Police use DNA to trace the blood samples of criminals.

We learnt that we could be the doctors that find out how to fix DNA and some of us think we’d like to be doctors when we’re older! We know a lot after all of this research we’ve done with Dr Fry!

by Year 4

Exercise by Blake F

Exercise makes your heart send lots of blood .

Your heart is made out of four chambers  top left, top right , bottom left and bottom right

First your blood  goes to your lungs  to get air then it goes around your body.

When you exercise after your heart pumping still for a few more seconds.

Mrs Lewis talked to us about how to find our heart beat. I found mine in my wrist. Then we started  to skip. After we counted our heart beat min was over 100.

Short term effect heavy breathing and sweating.

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Heart rate by Jay

On Wednesday the 18th of January 2017 year4 were doing exercise with Mrs Lewis. We were doing about the pulse of the heart. We were finding the best places to find are pulse. We found out the pulse was in our neck and our wrist. We could feel our heart beating in our wrist and neck. Then Mrs Lewis asked a question. The question was what is our heart made of. I said muscles and it was correct! Then Mrs Lewis got out some skipping ropes. She said that we are going to be skipping for 30 seconds. At first I was quite bad but I got better. Mr Tibbitt was really good at skipping. He was skipping really fast.

Then after 30 seconds was over we were all panting out loud. Then we felt our heart rate. Mine was pumping like mad. Then we counted how many times are heart was beating for one minute. My heart rate was 80 beats per minute. I found my answer by putting two fingers against my neck. Some of the other people in my class put two fingers against their wrist. I found it easier to put it against my neck because I could feel my heart rate against my neck. Then Mrs Lewis said that if we doubled are number what would we get. She put us into partners and I was with Zac. He said his number was 24. When we doubled the number it was 48. Then we doubled my number which was 80. When we doubled the number it was 160. Then we dropped our skipping ropes and gathered around Mrs Lewis. She asked us what our doubled number was and if they were past 100.  My number was over 100 so I was fine. Then Mrs Lewis said that we were going to skip again. Mrs Lewis said that the people who got over 100 don’t work as hard as you did last time.

I found it easier to do crisscross skipping. I got tangled a few times but I was on a roll. Then Mrs Lewis said (after 30 seconds) to feel your heart rate. Mine was 85 this time. We got back into the same partners and Zac said his was 64 which I thought was much better than last time. When I doubled Zac’s number we got 128. Then we doubled my number and it came up with 170. Then we went back to gather around Mrs Lewis. When Mrs Lewis asked who got over 100 everyone put their hands up and Mrs Lewis was impressed!

Then Mrs Lewis talked about short and long term affects. Short term affects could be sweat, panting and heart rate increasing. Long term affects could give you muscles. Then Mrs Lewis said that we were going to be skipping for one last time. I was skipping really fast.