For ‘Engineering Week 2019’, we have been learning about different types of engineers and their various roles.
After discovering some really interesting facts, we were tasked with an engineering challenge of our own!
We had to work as an engineer to design and construct a rubber band powered car.
We began by exploring our materials (cardboard, axles, wheels, elastic band, paper clip) and planning our design.
Then we moved onto the construction stage. This involved folding the cardboard into a box shape (also known as a chassis) and fitting the axles through the front and rear holes on the chassis. Next, we had to fit wheels to the end of each axel. Finally, we had to wrap the rubber band around the rear axle and then attach the rubber band to a fixed position on the front axle of the car.
Although we found it rather difficult to fit the rubber bands, we eventually managed to complete the design.
The final part of our challenge required us to test the rubber band car.
To do so ,we hand to wind up the real axle that was attached to the rubber band and then let it go. This caused the car to move forward.
When you wind up the car’s axle you stretch the rubber band and store potential energy. When you release it the rubber band starts to unwind, and the potential energy is converted to kinetic energy as the car is propelled forward.
We had great fun creating and testing our own parachutes in 3rd Class! Each group in the class decided to test a different material when making their parachutes to see which material worked the best. The materials used included tissue, paper, tracing paper, plastic, cardboard and fabric. We discovered that plastic worked the best and gave our pencil passenger the safest, steadiest landing! We also decided to test parachutes of different sizes. We discovered that the larger the surface area of the parachute, the more air resistance it will encounter. This means that larger parachutes will fall more slowly than smaller parachutes.
We have been experimenting and testing the force of water on objects by investigating things that float and sink.
To begin we collected a variety of items from around the classroom to investigate. As a class we predicted which items would sink and float in water. Next, in our groups, we took turns to test the items to see if they would sink or float. Lastly we sorted the items into two groups; sink or float and we recorded our results.
The second activity we completed was ‘Design a Boat’. Firstly we experimented with a ball of plasticine to see if it would sink or float and if changing its shape would make a difference. Then in our groups we tried to use the plasticine to design a boat that would float. If we were successful we tested our boat to see how many ‘passengers’ (dried peas) it could carry. After a few attempts some groups were successful! 🙂
The last activity we completed was an experiment called ‘Dancing Raisins’. We predicted what would happen to the raisins in water and in soda water and then observed the differences between the two types of water. We were amazed to watch the raisins begin to ‘dance’ in the soda water! Why do you think this happened?! 🙂
In room 10 we decided to experiment with energy and forces. We each made two paper helicopters using a simple template. What we need- Paper Helicopter Template. Scissors. Paper Clips. Ruler. With our paper helicopters made we then measured the length … Continue reading →
As part of the GreenWave Project we usually measure the windspeed. This year the GreenWave project is not running but we are still going to go ahead with the project. Check out instructions for how to make an anemometer by … Continue reading →
Investigation 1 What did we investigate? We wanted to find out which would fall to the ground first, a square piece of paper or a ball of paper? What predictions did we make? Because both the pieces of paper were … Continue reading →
We investigated forces in Room 12. First of all we discussed the difference between a push force and a pull force. We also discussed friction. Friction is a force that slows things down. We came up with examples of push, … Continue reading →
In room 12 we made our own hovercrafts. First of all we had to learn a little bit of information about the hovercraft. It is a vehicle that glides over sea or land on air. Although it is heavy, the … Continue reading →
Objectives: Understand that friction including air resistance is a force that slows moving objects and may prevent them from starting to move. Understand that when objects are pushed or pulled an opposing push or pull can be felt. Understand that … Continue reading →
Magnets are only attracted to certain types of metal like nickel, cobalt and iron.
Opposite poles like north and south are attracted to each other
Like poles – south and south repel each other.
In 2nd class we carried out investigations using magnets during science week.
First we made our predictions. We guessed which materials would be attracted to the magnets and which would not.
In pairs we tested the materials with the magnets.
I found out that on the magnet there will be a north and south pole. I found out the metals that magnets are attracted to are iron, nickle and cobalt. I also found out that the magnet is attracted to coins, staples and paper clips. The tinfoil did not stick to the magnet but I think that was because my magnet was not strong enough.
I found out that some magnets aren’t as strong as other magnets. The magnet that I had the coin was not attracted to it. Staples and paper clips were attracted to the magnet.