September 29th

1. Is malleability a physical or chemical property? Physical
2. What is ductility? Ability to pull an object into a wire.

September 30th

1. The volume of a candy bar is 55cm cubed. The mass of the candy bar is 70g. What is the density of the candy bar? 1.27/cm cubed.
2. The density of a bar of copper is 9g/cmcubed. If the mass is 216g, what is the volume? 24cm cubed.

October 2nd

1. A lump of coal has a mass of 18g and a volume of 25mL. Another lump of coal has a mass of 4.8g. What is the volume of the 2nd lump of coal? 6.6cm cubed repeating.

2. What is the density of each. D = M / V D = 18/25 D = 4.8 / 6.6 repeating

October 3rd

1. A metal beam is cut in half. One piece has a mass of 550g and a volume of 2000cm cubed. What is the mass of the 2nd piece if the volume is 230cm cubed?

October 6th

1. Dissolving sugar in water is an example of a ( PHYSICAL ) change.

2. Answer the questions on page 67 ( 1-5 ). You do not have to copy the questions. 1.B 2.C 3.A 4.C 5.A

October 13th

1. Elements in group 2 have ( 2 VALENCE ELECTRONS )
2. Elements in row 4 have ( 4 ELECTRON SHELLS ).
3. ( ALKALI ) are the most reactive metals.
4. Why is sodium chloride a "perfect match"? Sodium has 1 valence electron, chlorine has 7. 7 + 1 = 8 = Perfect

October 21st

1. Nitrogen has an atomic # of 7. An isotope of nitrogen containing 8 neutrons would be : C. Nitrogen - 15

a. Nitrogen - 13
b. Nitrogen - 14
c. Nitrogen - 15
d. Nitrogen - 16

October 23rd

1. How do you find the volume of a rectangular box? Length x width x height ( cubed )
2. To determine the state of matter, you must know how close the atoms are to one another and how free they are to ( Move ).

October 28th

1. A ( D. 30,000g ) object has more inertia than a 20kg object.

a. 2mg c. 2,000g
b. 5kg d. 30,000g

2. A book has a legnth of 25cm, a height of 5cm, and a width of 20cm. What is the volume? 2,500cm cubed.

November 4th

1. ( Kinetic Energy ) is the energy of motion.
2. Mechanical energy is the combination of potential and kinetic energy.

November 17th True or false.

1.( Chemical ) energy is based on the movement of particles within matter. ( False, THERMAL )

2. Nuclear energy holds an atom's nucleus together. ( TRUE )

3. ( Electromagnetic ) energy is the energy used to move particles. ( FALSE, Mechanical )

4. Kinetic energy is energy of motion and potential energy is stored energy. ( TRUE )

November 19th

Match

1. Energy you have when you're running - B. Kinetic energy
2. Energy you have standing still on a diving board - D. Potential energy ( gravitational )
3. Measure of usable energy after a conversion - E. Energy efficiency

November 25th

1. In which year did the greatest percentage of energy used in the United States come from crude oil? A. 1975

A. 1975 B. 1980 C. 1995 D. 2000

2. What three sources of energy account for about 80% of all energy used in each year shown? C. Coal, natural gas, crude oil

3. Which sources of energy show a greater percentage in 2000 as compared to 1980? C. Coal, nuclear

4. The use of which energy source tended to decrease between 1975 and 2000? C. Crude oil.

5. The use of which source of energy steadily increased between 1975 and 2000? C. Nuclear

December 1st

1. Solids, liquids, and gases are made of particles but gases are made of air. Air is not made of particles. ( FALSE )

2. Kinetic energy is the energy of motion. ( TRUE )

3. ( Kinetic ) energy depends on position and chemical composition. ( FALSE, Potential. )

December 2nd

1. What is the kinetic theory of matter?

2. How does temperature change when the kinetic energy increases? It increases.

December 3rd

Match

Fahrenheit | Freezing point of water is 32 degrees

Celsius | Freezing point of water is 0 degrees | Used by most countries and scientists | 100 units freezing point and boiling pts. of water.

December 5th

1. What is thermal expansion? Contraction - Removed heat, spread - added heat.

Match

2. Standard unit of energy - A. Joule
3. Amount of energy needed to 1mL of water by 1 celsius degree - B. Calorie

December 8th

True / False

1. The atoms that make up a rock ( never move ) because the rock is solid. ( False, they vibrate in place )
2. Two oxygen atoms bond with one carbon atom to form carbon dioxide. Carbon dioxide is a ( molecule ). TRUE

December 9th

1. When a rock falls from a cliff, its potential energy changes into ( kinetic ).

2. How much kinetic energy an object has depends on its ( mass ) and ( velocity )

December 10th

1. How many valence electrons do elements found in group 17 have? 7.

2. Where are metalloids located? Staircase area

3. Isotopes of an element differ in numbers of ( valence electrons )

December 12th

1. The amount of material in an object is its ( mass ).
2. Jason measures how much matter will fit inside a box. He is finding the box's ( volume ).

January 6th

1. Which of these is a pure substance? B. Table salt

2. When you measure the total KE of the particles in an object, you are measuring the object's ( thermal energy ).

January 7th

1. Which of these is a form of electromagnetic energy? C. Light

2. Can electromagnetic energy travel through empty space? Yes; a vacuum ( AKA outer space )

January 8th

1. A wave is a disturbance that travels through a ( medium ( matter ) ) or ( empty space )

2. A wave carries ( energy )

3. ( Frequency ) is the number of waves per second.

4. Sometimes people at sports events do the "wave". Is this a real example of a wave? No, it's not. There is no transfer of energy and the people are choosing to react like that.

January 9th

1. A wave has a speed of 3 m/s and a frequency of 6/s. What is the wavelength? 0.5m

2. In a ripple tank, the wave speed is 1cm/s with 10 waves passing each second. What is the wavelength? 0.1m

January 12th

1. Why don't ocean waves that move towards the shore empty out the ocean? They transfer energy but not matter.

2. Why can supernova explosions in space be seen, but not heard on Earth? Because space is a vacuum, a vacuum has no oxygen and sound needs oxygen for us to hear it, therefore we cannot hear sound from space but we can see it as light travels through a vacuum.

January 13th

1. If wave speed is constant, as frequency increases, the (wavelength) decreases.

2. What is the distance of the wavelength if the wave speed is 12m/s and the frequency is 6 waves/s? 2m/s


January 16th

1. ( On paper )

2. If you were watching a wave go by and counted 5 crests passing a certain point in 5 seconds what would be the frequency of the wave? 1 w/s

January 20th

1. When a wave bounces back from a barrier, (reflection) has occurred.

2. ( Refraction ) occurs when a wave bends as it passes at an angle from one medium to a different medium.

3. ( Interference ) occurs when two or more waves overlap.

January 21st

1. Explain what happens when waves encounter a medium through which they cannot travel? A reflection occurs.

2. Why can I hear two girls talking even after they turn the corner? Diffraction occurs

January 22nd

1. How could two waves on a rope interfere so that the rope did not move at all? The crest of one wave will meet the trough of another, that action occurring is coined "Destructive interference".

2. Name a natural disaster caused by waves : Tsunami

January 23rd

1. Name a wave that does not require a medium? Light, electromagnetic.

2. Which of the following results in more energy in a wave? A. Smaller wavelength

January 30th

1. Sound travels as a...B. Longitudinal wave.

2. Which part of the ear increases the size of the vibrations of sound waves entering the ear? B. Middle ear

February 2nd

1. Reflected sound waves are called ( echoes ).
2. Sound waves travel (away in all directions) from their source.
3. All sound waves are generated by ( vibrations ).

February 3rd

1. In a ( longitudinal ) wave, the vibrations move perpindicular to the direction of the wave. ( False, transverse )

2. Sound is a type of ( electromagnetic ) wave. ( False, mechanical )

3. Vibrations pass through many parts of the ear, not just the ear drum. True

February 6th

1. If a fire truck is traveling toward you, the Doppler Effect will cause the siren to sound...A. Higher

2. A technological device that can be used to see sound waves is an ( oscilloscope )

February 9th

1. Sound waves with greater than 20,000 hz - C. Ultrasound
2. How high or low a sound is - A. Pitch
3. Measure of the height of a wave's crest - B. Amplitude

February 10th

1. How does music differ from noise? Noise is random sounds without a pattern, music has a repeating pattern.

2. How do bats use echoes to find insects to eat? They send echoes out and they wait for it to bounce back and they calculate the time and distance it took and find the bug it bounced off of.

February 23rd

1. Mechanical waves transfer energy through a ( vacuum ). ( False, medium )

2. A wave is a disturbance that transfer energy. TRUE

3. Most electromagnetic waves are invisible but detectable. TRUE

February 24th

1. The distance from the Sun the Venus is 108,000,000 KM. Calculate the time it takes light to travel the distance. 300,000 KM / s = 6 minutes

2. The distance from the Sun to Jupiter is 778,000,000 KM. How long does it take light from the Sun to reach Jupiter? About 43 minutes.

February 25th

1. Which wave has the longest wavelength. ( A. --__-- )

2. If one wave represents a microwave and one represents a radio wave, which is the microwave? B

3. Which wave carries the most energy? B

February 26th

1. Calculate the time it takes light from the sun to reach Mercur. Mercury is 54,900,00 KM away from the Sun. 3 minutes 3 seconds, 183 seconds

2. List the waves of the EM spectrum in order from highest to lowest frequency. Gamma Rays, X-Rays, Ultraviolet, Visible, Infrared, Microwaves, Radio waves.

March 3rd

1. How is the color of an opaque object determined? If light can pass through it it is transparent, if it's not able to pass through it's opaque.

2. What 4 colors of pigment were used to print your book? Yellow, magneta, cyan, black

March 4th

1. We see the moon because of the ( reflection ) of sunlight off it.

2. What is the frequency of a wave that hass a wavelength of a 3m and a speed of 18m/s? 6hz

3. Pitch is determined by (frequency).

March 6th

1. 300,000km = 300,000,000m
2. 50kg = 50,000g
3. 761m = 7,610 cm

March 9th

1. What information do you need to describe an object's location? Reference point.

2. Where are the art supplies located in this room? Go in the front room entry door from the hallway and immediately turn left 90 degrees, walk straight until you reach the wall and then turn another 90 degrees and the art supplies will be located to the front above you.

March 10th

1. Does a change in direction affect acceleration? Yes, because a change in acceleration is a change in velocity.

2. You are riding your bike at 9 km/h. Ten minutes later your speed is at 6km/h. Yes, your velocity changed.

3. You ride your bike around your neighborhood at a constant speed of 11km/h. Yes, you are changing direction.

March 11th

1. A distance-time graph shows how speed changes with time. ( TRUE )

2. Speed is a vector. ( False, velocity is a vector. )

3. Average speed is total distance multiplied by total time. False, total distance is divided by total time to receive speed.

March 12th

1. Kira jogs to a store 72m away in a time of 36s. What is Kira's avg. speed? 2m/s

2. What is the avg. acceleration of a subway train that speeds up from 9.6m/s to 12m/s in 0.8s on a straight section of the track? 3m/s/s

March 16th

1. John walks for a few minutes, then runs for a few minutes. During this time his avg. speed is: C. Less than his final.

2. A cheetah can go from 0m/s to 20m/s in 2s. What is the cheetah's acceleration? 10m/s/s

March 17th

1. Jane walked 2km in half an hour. What was her avg. speed during this walk? 4 km/hr

2. Give two examples of an object accelerating : Subway train turning on a track, a car stopping at a light after going 20 MPH.

March 23rd

1. Speed includes direction, while velocity does not. FALSE ( Velocity and speed switch places )

2. A moving object covers the same distance in less time if its velocity is greater. TRUE

3. Acceleration measures only a change in speed. ( Velocity and time. FALSE )

March 26th

1. What is the formula for velocity? Change in velocity = gravity times time

2. State the acceleration due to gravity : 9.8m/s/s

3. If a baseball and a marble were dropped which would hit the ground first? Hit at the same time.

March 27th

1. Newton's second law states that to increase acceleration, you...A. Increase force.

2. During a race, you double your velocity. How does that change your momentum? Your momentub will be doubled.

March 30th

1. A (machine) is any device that helps make work easier.

2. There are (6 types) of simple machines. List them: Lever, pulley, wheel and axle, incline plane, screw, and wedge.

March 31st

Match

1. Scissors - A. 1st class lever

2. Baseball - C. 3rd class lever

3. Bottle opener - B. 2nd class lever

4. ( Compound machines ) are combinations of simple machines.

April 2nd

1. A material that does not allow an electric charge to pass through it easily is called an ( insulator ).

Match

2. The flow of charge ( Current )

3. Measure of electric potential ( Voltage )

4. Path for a current ( Conductor )

April 3rd

1. What type of circuit has only 1 path for the current to follow? Series circuit

2. If a bulb goes out in a parallel circuit, what would happen to the other bulbs? They would still work as there are more than 1 path(s).