Quarterly Review April 2015

Calculate the average speed of the runner. SHOW YOUR WORK!

What would be a good reference point to identify that the boy on the bike is in motion? Why? Josh ran the Kawameeh lap in 3 minutes and 46 seconds. Tiffany ran the Kawameeh lap in 3 minutes and 59 seconds. Who can run faster? Why? What kind of relationship do time and speed have? The bench, the tree, the fence. Anything STATIONARY Josh  He took less time Inverse  less time, more speed

Chapter 2 John 7N 8N 15N 7 N  11 N 

2.What does Newton’s First Law state? What is the tendency to resist a change in motion called? Identify the unbalanced forces in the following scenarios: HINT: Remember unbalanced forces cause an object to speed up, slow down, or stop. A car was speeding down the street until it stopped at the stop sign. Matt was dribbling to the ball until Josh stole it from him. The child was sitting on the swing until his Mom pushed him. An object at rest tends to stay at rest and an object in motion tends to stay in motion unless acted upon by an unbalanced force. Inertia Brakes  Made car stop Josh  caused Matt to stop His Mom  caused him to move

3. What are two ways you can increase the gravitational pull between two objects? 4. Which of the following has the most gravitational pull? How do you know that? PencilPen Paperclip Desk Chair 5.  Circle the marbles with the most gravitational pull. What is the relationship between distance and gravity? 6. If you were to travel to Mars your weight will change, because Mars has a different gravitational pull. What will not change? HINT: Your overall size is the same. 1. Increase Mass 2. Decrease Distance Desk b/c it has more mass Inverse  Less distance, more gravity Mass

Circle the point with the most GPE. What is happening at Point D in terms of KE and PE. What are the two factors that affect KE? (HINT: THINK ABOUT THE FORMULA) If a bus and a car were travelling at the same velocity down a highway, which one has more kinetic energy? Why? GPE is decreasing  KE is increasing Mass and Velocity Bus b/c it has more mass Often times when you are charging your phone you realize it is hot. Some energy is always transformed into ___________. Thermal energy

According to the law of conservation of energy: Energy is never _____________ or _______________. Energy can be ________________ or _______________. The total amount of energy ____ ____ _____ before and after any energy transfer or transformation. When a lightbulb is on it uses a total of 20 Joules of energy. Which of the four choices could be an explanation of how the energy was used in the machine? (HINT: The total amount of energy is the same!) 20 Joules of Radiant, 20 Joules of Thermal 10 Joules of Radiant, 20 Joules of Thermal 15 Joules of Radiant, 5 Joules of Thermal 5 Joules of Radiant, 5 Joules of Thermal created destroyed transferred transformed is the same

Chapter 4 Which of the following mediums can light waves travel through? (HINT: There are 4 in total and one is which sound cannot travel through) Vacuum (Sound cannot travel through) Gas Liquid Solid

Conduction Touching a hot iron Convection Heat is transferred by the movement of currents within a fluid (liquids or gases). Hot air rises, cold air sinks. The transfer of thermal energy from one material to another by electromagnetic waves. Sun warming beach

The picture below shows three images of a balloon. Picture B indicates the balloon size at room temperature. Identify what happens in Picture A and Picture C. Balloon A Thermal Contraction Slower particle movement Particles are close together AB Balloon C Thermal Expansion Faster particle movement Particles are farther apart C

Explain the flow of heat in the following scenarios: Holding a cup of hot chocolate Ice cubes in a cup of soda Accidently touching a tray of freshly baked brownies As temperature of a substance increases, explain what happens to particle movement? Hot cup to your hand Soda to ice cubes Hot tray to your hand More temperature, faster particle movement

Jenna and Michelle went to Panera Bread to study together. Jenna ordered a cup of coffee and Michelle ordered an ice cold lemonade. They both were so caught up with their studying that when they went to sip their drink  the coffee was no longer hot and the ice cold lemonade was no longer cold. Explain why this happened AND describe the particle movement of each drink before they became room temperature. Hot Coffee Ice Cold Lemonade: Faster particle movement  Heat from the coffee transferred to cooler room Slower particle movement  Heat from the room transferred to cold lemonade

SolidLiquidGas Particle Arrangement Close together; densely packed Motion of Particles Move freely; quicker than solid Volume No definite volume Shape No definite shape Chapter 6: 1. Complete the following chart: Vibrate in place Definite Volume Definite Shape Loosely Packed Definite Volume Farthest apart Fast No definite shape

Melting Vaporizing/Boiling Solid Liquid Gas Condensation Freezing

What is an example of the phase change that occurs at Point 6. What is the temperature at Point 2?(In Celsius) What is the temperature at Point 4?(In Celsius) Foggy mirrors after a warm shower Droplets form in lid of something warm 0° C 100° C