Monday, December 7, 2015
Grade 4 will be going on Camp from January 13th - 14th. Please look through these slides to find out more information about what we will be doing!
Thursday, December 3, 2015
Today 4HR spoke with Dr. Anthony Boyd via Skype. He is a physicist who works at a Naval Research Laboratory near Washington, DC. He talked with us about how he became a physicist, what his work day looks like, and answered our questions.
This is what we learned today:
- For a short time, we are stronger than gravity (lifting foot off ground)
- If there was no gravity, there would be no friction. The exception is in space when planets can rub against each other.
- If there is too much friction, we can't move.
- If there is no friction, you would slide a lot.
- Friction always works in an opposite direction.
- There is a relationship between the moon and tides.
- Gravity is stronger than friction
- Gravity is an attractive force, so it pulls not pushes.
- We need to gravity to stay down.
- Even if the mass is different, in space objects falls at the same rate.
- You can fit more than 1,000 Earths inside Jupiter.
- There is only one kind of gravity. Sometimes it is safe, sometimes it is dangerous.
- People can't combine their strengths to push ourselves to space.
- Floods are connected to high tide and low tide.
- If there was no gravity, it would be hard to breathe because dust particles would stay in the air.
- We are pulling against the Earth, but since the Earth's mass is so much greater, the Earth pulls us.
- Momentum doesn't help us gain acceleration, but it does help us gain velocity.
- We need a lot of space to get out of the Earth's gravity.
- Distance affects gravity and mass affects gravity.
- When an object is falling, air resistance is pushing up against the object. When there is larger surface area, there is more air resistance.