Units
What is the unit that we use for mass?
Kilograms (KG)
Which one has a bigger change in velocity?
Red car going from:
10 km/hour to 12 km/hour
Blue car going from
4 km/hour to 8 km/hour
Blue car
If the baseball is moving left on the grass. What is the direction of the force of friction?
Right
What is the process called when a Maple Tree captures energy from the sun
Photosynthesis
List three examples of a unit for velocity.
Answers may vary
A bike (80 kilograms) hits a tree and exerts a force of 10 Newtons on the tree. How much force is exerted on the biker?
10 Newtons
Sarah sleds down a hill with snow on it and goes 30 meters. She then comes back the next day to find that the snow has melted and that the hill has grass on it. When she sleds down, she only goes 10 meters. Which time had more friction?
The one with grass
What is a divergent plate boundary?
When two plates are moving apart.
What is the unit used for force?
Newtons
Two sheep ram into each other. Sheep A is 14 kilograms and sheep B is 12 kilograms. Which one will experience a bigger change in velocity and why?
Sheep B because it has less mass
What is the friction called when a bird flies through the sky?
Air Resistance
A chemical reaction occurs and CO2 turned into CO and what other substance
Oxygen (O)
Charlie has a mass of 45 and was running at a rate of 10. She then hit a wall with a force of 10. Add the units to each of these numbers
45 kilograms
10 km/hour (answers may vary)
10 Newtons
A couch is being pulled with 6 Newtons to the west by Josh, 2 Newtons to the east by Mike. It is also being pushed to the west by 4 Newtons from George. What is the net force on the couch?
8 Newtons West
Liz is bowling with some friends. She thinks that there is something wrong with the different bowling alleys. When she applies the same force on bowling alley A, she hits the pins dead on and all the pins fall down. However, when she does the same thing in bowling alley B, only 5 pins fall down. What could be wrong with alley B. Be specific.
It would have more friction on the alley and therefor slow the bowling ball down.
What is it called with a solid turns into a gas?
Sublimation
What is the unit for acceleration?
Meters/Second Squared
Jerry kicks two soccer balls with the same amount of force. Soccer ball A goes 30 meters and soccer ball B goes 10 meters. Once the soccer balls stopped moving he kicked soccer ball A into soccer ball B. After the collision, soccer ball A moved 4 meters. What is the range of how far soccer ball B moved?
Less than 4 meters
Kara wants a faster bike. She goes to the bike store and asks for tires that are smoother, so there would be less friction on the tires. However, the store manager said that all the tires are equally smooth, but the tires come in different widths. One that is 2 cm wide, 4 cm wide, and 1 cm wide. Which tires should Kara choose and why?
1 cm wide because it would have the least amount of friction.
What were the 5 units that we studied last year?
Plate Motion
Chemical Reaction
Phase Changes,
Matter and Energy
Population and Resources