Year 4 dissect hearts

Today we were looking at the heart and we found our way in through the aorta and the pulmonary artery. The hearts were a different shape to what some of us thought they would be. We felt the hearts and they are made of tissue and muscle. We could see the blood vessels. There was some fat on the outside of the heart because we need some fat in our bodies to keep our organs warm and protect them.

Before we cut them we had to feel them to see which side was the thin side and which was thicker. The thicker side was the ventricle muscle. When we cut the hearts open we could see the blood vessels, the 4 chambers and what we think was the aortic valve. We put our fingers through the aorta and pulmonary artery to see which chamber they went into.

Here’s what we thought about today’s dissection:

It was disgusting but extraordinary to see what was inside our heart.

It was interesting to see what the chambers in our heart look like.

I liked it because I found out that one side of your heart is thinner than the other.

The best part for me was feeling the heart because it felt firm, fleshy, strong and slimy.

I liked the part when we saw all the blood vessels because it was satisfying to see what they looked like.

I expected the heart to be a bit bigger because it pumps in your body.

I didn’t know that the fat around the heart was so hard.

It’s interesting how the heart works hard every day and I saw how the blood gets into the chambers.

I enjoyed looking inside the heart because it was amazing to see lots of blood vessels.

I didn’t like the bit when I touched the heart and it was extremely light.

This slideshow requires JavaScript.

Advertisements

Exploring lungs in Year 4

Today we found out how the lungs work. We looked at some lambs lungs with Year 3. We had to put on aprons and gloves and we worked in groups.

This slideshow requires JavaScript.

To see how the lungs inflate we used a balloon pump to blow air into the lungs. We put the balloon pump into the trachea and we saw the lungs inflate with air. We were surprised how big the lungs were when they were inflated and how small they went when they were deflated.

One group could clearly see the one of the bronchioles and it looked like a tree. We cut the lungs open and we could see the tubes that lead to the air sacs (alveoli). Another group was able to put their stick through the trachea and found their way into the lungs.

The lungs felt wet, slimy, cold, squishy, and spongy. The trachea felt harder than the lungs and they felt bumpy. On the back of the lungs we could see the tissue that would connect the lungs to other organs.

We all joined in exploring the lungs and here is what we thought:

I thought exploring the lungs was disgusting but okay.

I thought it was weird but awesome because we can see what lungs actually look like.  It was amazing to see how our lungs work hard every day.

It was inspiring to see how the lungs would work. I thought the lungs would be small but today I found out that the lungs were really big to pump a lot of oxygen around your body. I learnt today that our lungs need a lot of oxygen from the air.

It was interesting feeling the lungs because it felt smooth in some places and bumpy in other parts.

It was interesting looking at what’s inside us. I liked it when I put the stick through the trachea into the lungs.

It was interesting how squishy our lungs are.

It was interesting when you blow the lungs up, they change colour. It is satisfying to see how your lungs breathe.

It was amazing to see how our lungs would work.

It was interesting because I saw the holes in the lungs.

It was strange that only one of the lungs inflated.

The bronchioles looked a bit weird but I am a bit squeamish.

I enjoyed touching the lungs because they felt funny and squishy.

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!

This slideshow requires JavaScript.

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.

Image result for stroop test

 

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