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# Semester 1 Final ILS

Question | Answer |
---|---|

What is energy with movement called? | kinetic energy |

Energy that is normally associated with heat or friction. | Thermal energy |

Ability to do work | energy |

What is the volume of a liquid measure in? | liters or milliliters |

How much larger is a centimeter than a millimeter? | 10 times |

What is a broad explanation that is widely accepted because it is backed up by a great deal of evidence? | theory |

force that pulls objects toward the center of the Earth at 9.8 m/s/s | gravity |

when is something considered a projectile? | when only the force of gravity is acting on the object |

energy cannot be created or destroyed | Law of conservation of energy |

Energy that is dependent upon the height or position of the object | potential energy |

a measurement with direction and magnitude | vector |

a measurement with only magnitude | scalar |

word that means "not a factor" | negligible |

another way to think of frame of reference is a particular | point of view |

How are scientific theories different from the everyday use of theory? | scientific theories are backed by data and evidence, while the everyday use of theory is more of a guess |

In a physics problem sometimes direction is indicated using a | positive or negative sign |

on a distance time graph the __________ of the line indicates average speed of the object | slope |

study of motion | kinematics |

when some thing is draw to scale it is draw to ________________ | proportion |

speed at a particular instant | instantaneous speed |

balance point of an object | center of mass |

frame of reference from the Earth in which the object is moving at a constant velocity | inertial frame of reference |

force that acts against objects moving through the air | air resistance |

angle at which a projectile moves through the air | trajectory |

kinetic energy most often converts to ___________ energy causing the object to slow down | thermal |

if net force is zero then no __________________ will occur on an object | acceleration |

observation with numbers | quantitative observation |

observation using features | qualitative observation |

The acceleration due to gravity on Earth is | 9.8 m/s/s |

What does it mean if you hear "Air resistance is negligible?" | not a factor in the projectile's movement |

Acceleration is.... | speeding up, slowing down, or changing direction |

Newton's First Law | An object at rest remains at rest unless an net force greater than zero acts on it. An object in motion remains in motion unless a net force greater than zero acts on it. |

Newton's Second Law | Force is proportional to the mass and acceleration of the object |

Newton's Third Law | Each force has an equal and opposite reactionary force |

If a passenger is in a train moving at 30 m/s east, the passenger gets up and walks 2 m/s in the opposite direction of the moving train. From an observer outside the train, how fast would it look like the passenger was moving? | 28m/s east |

A person walks 1 mile every day for exercise, leaving her front porch at 9:00 A.M. and returning to her front porch at 9:25 A.M. What is the total displacement of her daily walk? | zero displacement (because the start and finish point are the same.) |

A car traveled 88 km in 1 hour, 90 km in the next 2 hours, and then 76 km in 1 hour before reaching its destination. What was the carâ€™s average speed? | 63.5 km/h (add up the total distance and divide by the total time) |

An object in free fall near the surface of the Earth experiences what constant (velocity or acceleration?) | acceleration |

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 2 s. What is your acceleration? | 1 m/s/s |

What is a change in velocity? | acceleration |

What is speed in a direction? | velocity |

What is speed? | the amount of distance in a given time |

What is the difference between distance and displacement? | distance is the total amount of a trip, while displacement is only concerned about start to finish and direction |

If you are sitting on a train, and the train is traveling at 30 m/s, how fast are you traveling relative to the train? | 0 m/s |

Why are we always in motion relative to the Sun? | We are moving around the Sun on the Earth at a very high velocity |

What is the equation for finding the average speed of an object? | distance/time |

What is the equation for finding acceleration of an object? | change in velocity/time |

What is the equation for finding the force of an object? | mass multiplied by acceleration |

Kinetic energy depends mostly on an object's | motion or velocity |

Which law is at work in this situation? Two ice skaters are in the middle of a rink. One pushes off the other, they both move backwards at the same rate in opposite directions | 3rd |

Which law is at work in this situation? An elephant is charging at you, your best bet is to run in a zig zag line because the elephant's large mass makes it harder to change direction. | 1st |

Which law is at work in this situation? You notice two carts. One has twice as much mass as the other. You push with the same force, but the cart with less mass accelerates greater. | 2nd |

information gathered by your senses | observation |

A hypothesis must be three things to be valid | tentative, testable, falsifiable |

Why are some things not in the realm of science, like opinions or fairy tales? | they cannot be tested |

A prediction made using observations and prior knowledge | inference |

independent variables | variable that is being tested |

dependent variables | variable that is the outcome of the experiment |

constants | variable that remains the same throughout the experiment |

how the data fits together is known as a... | trend |

What are the steps to our lab procedures? | make an observation, ask a question, form a hypothesis, create a procedure, run the test, collect and analyze data, communicate findings |

what is needed when writing a good scientific argument? | evidence and data |

Length | meters, cm, mm, km |

time | seconds, minutes, hours |

acceleration | m/s/s |

Velocity or speed | m/s or km/hr |

Mass | kg, g, or mg |

Force | Newton |

Energy | Joule |

Volume | liter or milliliter |

How many cm in a m? | 100 |

How many mm in a cm? | 10 |

Know steps to solving a conversion factor problem | 1. Write what you are given 2. Write the same unit diagonal 3. Write out the equivalent 4. Cross out the like units 5. Multiply the top and divide by the bottom. |

What is the potential energy of an object that reaches a height of 30 meters and had a mass of 6.5kg? | 1,911 J (mass x gravity x height) |

An experiment where only one variable is changed or tested in the experiment is called a ____________________ | Controlled experiment |

Total length of an object | distance |

Length and direction from starting point to finish point | displacement |

Mass' tendency to keep doing what its doing | inertia |

force distributed over an area | pressure |

gravity's effect on mass | weight |

Created by:
senecairishscience