Vocabulary
What is a push or pull exerted by one object on another?
Force
A scholar applies the brakes on his bike. This squeezes the brake pads against the wheels and the bike slows down. What causes the bike's speed to decrease?
Friction
A train moving along the tracks. This is an example of -
Kinetic Energy
If you were to push a heavy box over grass or ice, which one would have more friction?
A. ice
B. grass
C. the friction would be the same for both
B. grass
Which layer of the Earth is the thinnest?
Crust
What is described by an object’s direction and speed?
Motion
Example: We walk on the right side of the hallway.
What vocabulary word is being described in the example above?
Direction
If the bicyclist is traveling at 25 miles per hour, what type of energy does the bicyclist possess?
Mechanical Energy
All the following would be changes in motion EXCEPT —
A. slowing down
B. starting from a stopped position
C. going in a different direction
D. moving at a constant speed
D. moving at a constant speed
What does if a resource is a renewable resource?
The resource can be replaced and will never run out.
What is a force that opposes or tries to slow down motion?
Friction
A scholar conducted an experiment on friction by rolling a toy car down an inclined plane with different surfaces. Which surface had the least friction?
Options: Glass, Carpet, Sandpaper, or Wood
Glass
When you plug in a fan, you are transferring __________ energy to __________ energy.
Electrical Energy to Mechanical Energy
A ball is thrown up, pauses briefly in mid-air, and then falls back down. What force causes it to fall?
A. speed
B. gravity
C. height
D. friction
B. gravity
What three events occurs in the beginning of the formation of sedimentary rocks?
Weathering
Erosion
Deposition
Speed is a measure of —
how fast or slow the motion of an object is
Ricardo is ice skating. Vicki pushes him from the side. What most likely happens to his movement?
Ricardo changes direction.
A book is sitting on the edge of a shelf. It may fall. This is an example of —
Potential Energy
If an equal force was exerted on boxes of various weights, which box would move the farthest?
[lbs = pounds]
A. 30 lbs box
B. 50 lbs box
C. 10 lbs box
D. 20 lbs box
C. 10 lbs box
A scholar blindfolded each of his family members. Each person tasted Berry-Os and Fruity Loops to see which they liked better. The scholar recorded the results.
What is the independent variable in his experiment?
The brand of the cereal
These are two forces where one is stronger than the other - this causes movement or motion
Unbalanced Forces
Is the following statement true or false?
The more friction working against an item, the easier it is to move the item.
False
Part 2: Give an example of an object when it has potential energy and the same object when it has kinetic energy.
Kinetic - energy in motion (actively moving)
*examples will vary*
A family went grocery shopping and split the shopping list to make the shopping time go faster. Each person pushed their item in a shopping cart. Who had to use the least amount of force to push their cart?
A. mom getting a large bag of dog food
B. sister getting a box of cereal
C. dad getting a case of water
D. brother getting a gallon of milk
B. sister getting a box of cereal
Part 1: Name the three states of matter
Part 2: Describe the three states with relation to their volume, shape, and look of their molecules
Part 3: Name the four changes in states of matter (using correct terminology)
Solid: definite volume, definite shape, close molecules
Liquid: definite volume, no definite shape, somewhat loose molecules
Gas: no definite volume, no definite shape, very loose molecules
Solid to Liquid = Melting
Liquid to Gas = Evaporation
Gas to Liquid = Condensation
Liquid to Solid = Freezing