# Mega Ice

Mega Ice

Yesterday ( December 14th ) our whole grade went ice-skating in the biggest rink in Hong Kong which is Mega Ice in a shopping centre called Mega box. The ice-skating rink is on the top of the shopping centre. Our grade left the school at 8:55am to take the bus to Mega box and at 1:55 our grade left Mega box. When we arrived at Mega box we had to take the escalator to get to the top of the shopping centre. Most students in our grade didn’t bring their own ice-skates, instead they borrowed it from the front counter of the rink. We stayed at Mega Ice approximately 5 hours. We ate lunch at around 11:30. Some of us had figure skates and some people had hockey skates. Unfortunately there was multiple cones in the middle of the rink for some skating coaches to teach kids. My friend taught me how to use figure skates cause there a little different than hockey skates . After a couple rounds my friend and I took a couple breaks. Some people even wear short sleeves when the rink was super cold. I wear a top and a pretty thin jumper. When I came back from Mega Ice my feet was very sore and I still have a little mark from the figure skates because it was so suffocating and tight. But I still had a lot of fun ! I enjoyed the field trip a lot.

# Newton’s Laws Of Motion

Newton’s laws of motion

Today we went on brainpop and watched about Newton’s laws of science. The video talked about what we’re Newton’s 3 laws. The scientific law that Newton created says “an object in motion will stay in motion and an object at  rest will stay at rest.” Say for example I have 2 toys cars and I leave the first one alone and I push the second one.  The first car will stay there because I didn’t push it but I pushed the second car so the second car moves. The second law that Newton created was “

An object that has an unbalanced force acting on it will accelerate in the direction of the force.” Newton’s third law says “forces always occur in equal and opposite pairs.” I had so much fun watching the brainpop video.

# Sailboats

Sailboats

On November 29th  we were still inquiring into buoyancy so we got into groups and created a sailboat using cardboard, a plastic bag and a piece of paper. The challenge was you had to create a boat that can carry one marble across the water.

The next day we went to the Green Roof on the 10th floor and we placed our sailboats on a little basin that was a really small amount of water. We tried to place our sailboats on the basin and Mr. Wahid used to pieces of cardboard to create wind for the sailboats to move. Luckily all of the sailboats floated and were able to carry one marble across the basin. Ours didn’t really go that fast, but at least it was able to carry one marble across.

I think my group worked really well and we didn’t really argue when we started making the sailboat. I think we did a pretty good job working well together! I found making the sailboat was a tiny bit challenging because you could only use the materials given to you . I would improve on my design by maybe making the one more sail so it could move across easily. I enjoyed creating the sailboat with my group members and seeing if the boats that people in our class made a sailboat that can be able to carry a marble across the basin, it was really exciting. I enjoyed it so much!

# Buoyancy

Buoyancy

This week we were researching about buoyancy on Brainpop and we watched a video and we created a mind map about it. The video said water and other liquids are a fluid. We use fluids all the time so we don’t know how strange they are. If we push solids it bounces back at you but if you push through a liquid, it doesn’t push back at you. Archimedes’ theory of buoyancy is that the buoyant force is equal to weight of water an object displaces. Whether that the force is strong enough to make something float depends on the objects destiny.The negative buoyancy that it weights more than the volume of water it displaces. But the positive buoyancy is an equal volume of displaced water is more than enough to support it. That’s the positive buoyancy. Objects with neutral buoyancy weight about the same as the displaced water. Negative buoyancy is when the object weighs more than the volume of water it displaces. That’s negative buoyancy. For me buoyancy is so interesting !

# Gravity

Gravity

Today, we were finding out something about gravity on brainpop. Our central idea is: We develop knowledge about forces and motion through scientific inquiry. So when we went on brainpop we made another mind map about gravity. The video said that gravity is one of the most powerful forces in the universe. The first person who discovered gravity was a man named Isaac Newton. How he discovered was when he was reading a book under an apple tree and while he was reading his book an apple came down and landed on his head. After Newton discovered gravity Albert Einstein expanded Newton’s theory of gravity. Einstein’s theory of gravity was massive objects actually bend space and time.They say that Newton and Einstein  are the first two people who discovered gravity. It’s really interesting.

# Forces Mind Map

Forces Mind Map

This week we’ve been learning about Forces on brainpop. Then we made a Mind Map about it using the keywords like gravity, magnetism,friction and son on. We made a Mind Map to show what we know about all the forces. There’s also the contact force and the non-contact force. Drag,friction, push and pull are contact forces which means there objects that are touching with something else. Gravity is an non-contact force: it can affect objects that are separated, like the earth. Magnetism and the electrical force are also an non-contact force. Gravity’s fields gets weaker the further you go from earth also known as a non-contact force. All of the forces are really powerful . The brainpop video was talking about what kind of forces there are. In the world, there are so many forces that you can use . Like there was bouncy that the brainpop video didn’t talk about. All forces are really interesting. I would love to make a new mind map again.