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| Pregunta | Respuesta |
| What is the base unit of length in the metric system? | Meter |
| What is the base unit of mass in the metric system? | Gram |
| What is the base unit of volume in the metric system? | Liter |
| What is the base unit of force in the metric system? | Newton |
| What are the freezing point and melting point in Celsius? | Freezing point=0, melting point=100 |
| Convert 43 miles into feet | 227040 feet |
| How many feet are on a football field? (100 yards) | 300 feet |
| Convert 115 yards to miles | 0.065 miles |
| Convert 34 gals to mL | 128656 mL |
| Convert 5400 inches to miles | 0.085 miles |
| Convert 54 yards to cm | 4937.76 cm |
| In class, 28 students are given 4 pens. If there are 8 pens in 1 package, how many packages of pens need to be purchased? | 14 packages |
| What do most scientific experiments (ADI's) begin with? | The guiding question |
| What is a hypothesis? | An if/then statement that can be tested |
| What do we call any part of an experiment that changes? | A variable |
| What are constants (controls) in an experiment? | Variables that must be controlled to remain the same |
| What is an independent variable? | The variable that the scientist controls and changes |
| What is a dependant variable? | The variable that the scientist is measuring |
| Kate is trying to figure out how much people's paychecks will be depending on the number of hours they work. What are the dependant and independent variables? | Independent variable: # of hours worked Dependant variable: How much paychecks are |
| Chris says the winner of the football game depends on who scores the most points. What is the independent and dependant variable in this scenario? | Independent variable: Who scores the more points Dependent variable: The winner of the football game |
| Holly sees how many portraits she can make in an amount of time drawing. What is the independent and dependant variable in this scenario | Independent variable: The amount of time spent drawing Dependant variable: # of portraits made |
| Define speed | The time it takes to travel a defined distance |
| How do you calculate speed? | Divide distance by time |
| What units do we use generally to measure speed using the metric system? | meters per second m/s |
| What is the difference between velocity and speed? | Velocity is the speed in a specific direction |
| A car goes 100km/hr for 10 hours. How far did it go? | 1000 km |
| A slow jogger runs for 30 minutes and goes 3km. What is her speed? | 0.1 km/m |
| A very fast puppy runs 4 meters per second for 4 seconds. How far does it run? | 16 meters |
| A ball is rolling down a hill at 20 cm/min. It rolls for 2,100cm. How long does it roll? | 105 min |
| Define acceleration | Change in velocity over time |
| How do you calculate acceleration? | Final velocity minus initial velocity divided by time |
| What is a force? | A push or a pull |
| What is mass? | The amount of matter an object contains |
| What are balanced forces? | Forces that are equal and opposite and cancel each other out |
| What are unbalanced forces? | Forces that are not equal and opposite and do not cancel each other out |
| What kind of forces cause objects to move or to stop moving? | Unbalanced forces |
| What is a net force? | The total force acting on an object |
| Martha pulls a box with a force of 50N to the right. Randy pulls with a force of 110N to the left. In which direction will the chair accelerate? What is the net force acting on the chair? | Toward Randy to the left, and the net force is 60N left |
| State Newton's 1st law of motion | An object at rest stays at rest, and an object in motion stays in motion unless acted on by an unbalanced force |
| State Newton's 2nd law of motion | F=m*a or a=f/m |
| State Newton's 3rd law of motion | For every action there is an equal and opposite reaction |
| Give an example of Newton's 1st law | A ball will stay in place until something pushes it, then it will continue rolling until friction slows it down or it hits something. |
| Give an example of Newton's 2nd law | It takes more force to push a boulder than a small rock |
| Give an example of Newton's 3rd law | When a rocket blasts down, it shoots up. |
| What is Inertia? | The tendency of an object to want to keep doing what it is doing |
| What determines how much inertia an object has? | Mass |
| What is the correct unit for force? | Newton |
| Which law of motion relates to action/reaction forces? | 3rd Law |
| How does inertia relate to heavy objects and lighter objects? Meaning... which is easier to push and why? | Heavier objects will be harder to push because heavier objects have more inertia |
| Explain this concept using Newton’s 3rd Law of Motion: You press down on the water with a beach ball and you feel the water pushing back up. | As you push down on the water with the beach ball, the water presses back up on you and the beach ball |
| Which law is the Law of inertia? | Newton’s 1st law |
| What are the two factors that determine the amount of force an object has according to Newton’s 2nd Law of Motion? | Mass and acceleration |
| Explain the equation F = m*a | To determine force you need to multiply mass by acceleration |
| Explain the equation a = F/m | To determine acceleration you need to divide the force by mass |
| What are the two main categories of energy? | Potential and Kinetic |
| The ability to do work is | Energy |
| What is the energy of motion? | Kinetic energy |
| What is stored energy? | Potential energy |
| Something can have potential energy due to what 2 things? | Height or mass |
| What is chemical energy? Give an example | Stored energy in the form of chemicals, in the food you eat |
| What is nuclear energy? Give an example | Stored energy in atoms, the sun |
| What is electrical energy? Give an example | Energy in the form of electricity |
| What is thermal energy? Give an example | Energy in the form of heat, a heater |
| What is radiant energy? Give an example | Light energy, a light bulb |
| What is mechanical energy? Give an example | Energy that produces sound, yelling |
| Describe the energy transformation that happens in a flashlight | Chemical energy in the battery is converted to electrical energy in the wires which are converted to light energy in the bulb |
| Describe the energy transformation that happens in a toaster | Electrical energy from the plug is converted to heat and light energy |
| Describe the transfer of energy as you rub your hands together | Mechanical energy from moving creates friction which creates thermal energy |
| Describe the transfer of energy on a roller coaster starting at the top of the first hill, going down to the lowest point, then going back up to the top of the second hill | The roller coaster is all potential energy at the top of a hill, and it converts to kinetic energy as the roller coaster moves down, then the kinetic energy moves back to potential energy as it goes back up the hill |
| What is the main source of energy from which we get our electricity? | Fossil fuels |
| What are 6 other alternative sources of energy other than this main source? | Wind, Solar, Geothermal, Hydroelectric, Biomass, and Nuclear |
| What source of energy uses the power of moving air? | Wind |
| What source of energy uses the heat from the Earth? | Geothermal |
| What source of energy uses the power of moving water? | Hydroelectric |
| What source of energy uses energy stored in the nucleus of uranium atoms? | Nuclear |
| What source of energy is the power of the sun? | Solar/Radiant |
| What source of energy uses organic materials like plants and animals? | Biomass |
| What is a wave? | A transfer of energy from one place to another |
| What are the two categories of waves based on what they move through? | Mechanical and electromagnetic |
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