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Wigley Final
Physical Science Crovato
| Question | Answer |
|---|---|
| The "Law of Inertia" is also known as ____________ | Newton's 1st Law |
| What is a compound machine? | a machine made up of 2 or more simple machines that operate together |
| What is power? | rate of doing work |
| How many paths through which charge can flow would be shown in a circuit diagram of a series circuit? | 1 |
| A wet cell battery produces electrons from the chemical reaction between what 2 substances? | sulfuric acid and lead |
| What is measured at a particular time? | instantaneous speed |
| What are 2 examples of 2nd class levers? | wheelbarrow and nutcracker |
| What does "milli" mean? | 0.001 |
| How many watts are in 1 HP? | 746 |
| What kind of friction occurs as a fish swims through water? | fluid |
| According to Newton's second law of motion, the acceleration of an object equals the net force acting on the object divided by the object's______ | mass |
| What type of current is produced by a battery? | direct current |
| What law of motion describes action and reaction forces? | Newton's 3rd law |
| An open parachute increases air resistance of a falling sky diver by __________ surface area | increasing |
| What is work? | transfer of energy |
| What is a drawback of solar energy? | it depends on climate |
| What is an example describes constant acceleration due ONLY to a change in direction? | traveling around a circular track |
| What type of graph is used to show how a part of something relates to the whole? | circle graph |
| How are science and technology related? | advances in science may lead to advances in technology and vice versa |
| What is a true statement about scientific theories? | they may or may not ever be proven |
| What are 2 ways a machine can make work easier for you? | by changing the direction of your force and by multiplying your force |
| What is a scientific law? | a rule or principle that describes what happens in nature |
| What causes projectile motion? | the downward force of gravity and an initial forward velocity |
| Reducing friction in a machine _______ its efficiency therefore producing more work output | increases |
| What does "kilo" mean? | 1000 |
| Charges flow easily through what type of material? | metal |
| How do wheels reduce the amount of friction? | they reduce surface area between surfaces in contact |
| An electroscope is designed to detect an ______________ | electric charge |
| What is the first step of the scientific method? | state your problem |
| What type of energy is stored in gasoline? | chemical eneregy |
| What is a system of knowledge and the methods used to find that knowledge? | science |
| What would reduce the resistance of a metal wire? | increasing it's thickness |
| What's the acceleration due to gravity of earth? | 9.8 m/s/s |
| What would have high inertia? | a jet plane sitting still on the runway |
| What the SI unit for temperature used in scientific measurement? | kelvin |
| What are 3 factors that affect the amount of sliding friction between 2 objects? | 1)weight of objects 2) type of surface 3) amount of lubrication on surfaces |
| What is resistance measured in? | ohm |
| What's the SI unit of force? | newton |
| If an object gains elections, it becomes __________ | negatively charged |
| What devices are used to keep electrical circuits from overheating? | circuit breakers and fuse |
| What is kinetic energy? | energy of motion |
| Why is the gravitational potential energy of an object 1 meter above the moon's surface less than its potential energy 1 meter above Earth's surface? | The object's acceleration due to gravity is less on the moon. |
| As you push a cereal box across a tabletop, the sliding friction acting on the cereal box __________________________________ | in the direction opposite of motion |
| In the equation for acceleration, how can you describe acceleration if the numerator is negative? | Slowing down or deceleration |
| As an astronaut travels far away from Earth, her weight decreases because ____ decreases | gravity |
| Why might an orange roll off your cafeteria tray when you stop suddenly? | because of the oranges inertia |
| What is an ax an example of ? | wedge |
| Most circuits in your home are ______________ | parallel circuits |
| Walking converts what type of energy into mechanical energy? | chemical |
| A benefit of a hydrogen fuel cell is that its byproduct is __________ | water |
| A machine is a device that can multiple ______ | force |
| What the SI unit of power? | watt |
| How can you tell if an object is accelerating? | it speeds up, slows down or changes direction |
| A horizontal line on a distance-time graph means the object is _______ | at rest |
Created by:
dcrovato
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