What is energy?
The ability to do work
What can force make an object do?
Hint: 4 different things
1. Start moving
2. Stop moving
3. Change speed
4. Change direction
If its an open ciruit?
If it is a closed circuit?
if its open its broken
If its closed it flows
What are the forms of energy?
MELTS
Mechanical, electrical, light, thermal, sound
14. An adult was asked to compare the masses of three balls that were all the same size but made of different materials. The adult used a balance to compare the masses of two balls at a time. The adult repeated this process another time with a different pair of balls and recorded observations.
Which list shows the balls in order from greatest to least mass?
A. Balls C, B, A
B. Balls A, B, C
C. Balls B, A, C
D. Balls C, A, B
C. Balls B, A, C
Inertia
The resistance of change in motion
A marble is at the top of each ramp, whixh ramp will the marble travel the furthest?
(I will draw the images)
D
Draw a picture of a series circuit.
What type of energy does a computer use. Give examples for each.
Electrical- The computer is part of a complete circuit that allows it to work
light- the screen produces light so that you may see your work
sound- the speaker makes noise
What is the difference between a conductor and an insulator adn give an example of each
Conductors helps the flow of energy
example: Penny, iron nail
Insulator stops or keeps the flow of energy in
example: wood, plastic
Reflection
The bouncing back of light rrays from a surface.
A force between two surfacses rubbing against each other.
Friction
Draw a picture of a parallel circuit.
Ladder
How does light travel?
In waves in a straight line
Students made observations of several different substances and classified them into the groups shown. How could you classify each group in the chart below?
Group 1: ____________________
Group 2: ____________________
Group 3: ____________________
Which of the following materials should be classified into Group 3?
Group 1 Group 2 Group3 Wood Water Helium Iron Lemonade ?
What belongs in the question mark for group through?
A. Glass
B. Granite
C. Oxygen
D. Plastic
Group 1 : Solid
Group 2 : Liquid
Group 3: Gas
C. Oxygen
Rrefraction
How does force relate to motion?
Without force, there is no motion
Why does the light bulb not glow?
(I will draw the image on the board)
The light bulb is not part of the closed circuit.
A person is looking into a pond and sees an image of themselves and notices a stain on their shirt. Why can the person notice the stain?
Light is reflected by the pond.
The amount of mass in a known volume of an object or substance
Density
When light passes through a material.
Transmission
A student pulls a 50 gram block accross a desk using a spring scale. If the 50 gram block is changed to a 75 gram block, what would happen to the amount of force needed to pull the block?
The amount of force needed would increase.
What will happen if the switch is open on the following parallel circuit?
Teacher explains answer
What type of materials reflect light energy?
What type of materials refract light energy?
Reflect- Shiny materials
Refract- transparent materials
What is the difference between a mixture and a solution.
Solution- 2 or more substances mixted together, 1 must be a liquid, not easily seperated, properties change
Mixture- 2 or more substances mixed together, easily seperated, properties do not change