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2025 IAPS P7
| Question | Answer |
|---|---|
| What would the independent and dependent variables be in an experiment where you test how the type of water affects plant growth? | Independent- type of water Dependent- plant growth |
| What would the independent and dependent variables be in an experiment where you test how the type of paper towel affects liquid absorption? | Independent- type of paper towel Dependent- liquid absorption |
| What is a limitation of every model? | It is not like the real thing |
| Why do we use models? | They help us study concepts that are too big, small, complex, difficult, or dangerous |
| What does it mean if I say that sound is a mechanical wave? | It cannot travel through space; it needs a medium to be able to travel |
| If you are in space and you turn on a very strong flashlight and you also scream, what wave would people on Earth receive? | They would receive the electromagnetic light waves |
| Logan does an investigation where he released the same car from a ramp at different heights down a ramp. The ramp leads to a block that the car hits to move along a track. What is his independent variable? | The independent variable is the height of the car. |
| Based on Logan's investigation, hypothesize how the block would be affected if he released the car from the highest point on the ramp versus the lower point on the ramp. | The block would go farther when hit by the car coming from the highest point. The block would go a shorter distance when hit by the car coming from the lowest point. |
| A new breakthrough discovery about climate change has caused many federal governments to begin researching ways to lower carbon dioxide output within their respective nations. Based on this scenario, how did science affect society? | Science affected society by warning them about an issue related to nature, which was climate change. |
| A widespread riot over lack of disease prevention in a developing country has led to an increase in funding towards the nation's disease prevention centers. How did society affect science in this case? | Society affected science by funding a scientific endeavor, which in this case was disease prevention. |
| Two people are near the shore of a lake. One is swimming in the water and another is sitting on the sand. A rockslide occurs on the other side of the lake. Who would hear it LAST? | The person sitting on the sand would hear it last. The sound would travel faster through the water than through the air. |
| A newly built submarine has an experimental sonar system that can be effectively used above-water. If the submarine wanted to use the sonar system to detect an enemy, would it be more effective to use it above-water or below-water? | Below water. Sound travels faster in liquids than gases. |
| Claire is conducting an experiment about how sunlight affects plant growth and asks Swanika to also do the same experiment. What does this represent and how is it important? | Replication; reduces bias in an experiment. |
| Shayna is conducting an experiment about how different chemicals react to a coin. She wants to make her data more valid. What should she do? | She could conduct multiple trials; this is an example of repetition. |
| Malak flashes a beam of light into a mirror and notices the light flashes right back at her. What is this an example of? | Reflection. |
| Bob observes a beam of light being reflected off a mirror. If the angle of reflection was 36 degrees, what was the angle of incidence? | 36 degrees. |
| A student designed an experiment where they put an ice cube in a glass of water and observed how long it will take to melt. On a graph, where would you put the different amount of water in the glass? | On the x-axis |
| A student wants to test the effect of sunlight on plant growth. Plant A, B, and C were placed in different light exposure rooms. On a graph, where would how much the plant grows be on the graph? | On the y-axis |
| A light ray passes from the sun into the water at an angle. What type of light movement does this represent? | Refraction |
| What is the type of light movement that happens when light bounces off a surface? | Reflection |
| How may replication be used to ensure that the result of a scientific investigation is reliable? | Replication can be used to eliminate bias |
| What should be kept in mind while setting up a scientific investigation to ensure that it is a valid experiment for the topic? | Test one variable at a time |
| What is typically the reason for not switching over to ecofriendly energy sources? | Cost of changing the kinds of energy currently used and infrastructure |
| A county lacks funds to get ecofriendly energy sources, what are other reasons of not implementing them? | Lacking in technology needed or not having enough data to change |
| Skyla made an investigation to see if caffeine affects plant growth. She sets up identical pots with soil, plants, light, and liquid. She checks the height of the plants every other day. What is the dependent variable. | Height of the plant. |
| On a speed graph what is the independent variable; time or distance. | Time. |
| Cevan created an experiment. when he collected his data, he found out that it did not support his hypothesis. What should he do. | He should examine the results of his experiment, correct his hypothesis based on the data and test it again. |
| Evan corrected his hypothesis to support the data without trying the experiment again. What should he have done. | Changed the hypothesis based on the data and test it again. |
| Carmina started a boat on the surface of the lake. Who would hear the sound first a lake trout in the lake or a friend on the beach. | The lake trout because sound travels faster through water than air. |
| A jet passes over a city and breaks the sound barrier. Who would hear it first a person in a skyscraper or a person on the ground taking a walk. | The person in the building because sound travels faster through solids than through air. |
| Ryan is learning about the electromagnetic spectrum. He sees a connection between the frequency and energy level of the wave. What is it? | The higher the frequency, the higher the energy. The lower the frequency, the lower the energy. |
| Jack is classifying different types of waves with his class. The wave they are on has a very long wavelength with low frequency. What type of wave has the longest wavelength? | radio waves. |
| A rollercoaster starts at the top of the highest hill and then runs down to the lowest position on the track. Where is gravitational potential energy the greatest? | The highest position above the ground. |
| If a cart is rolling down a hill, describe the relationship between the carts potential energy and its kinetic energy? | It was an inverse relationship |
| What two waves on the Electromagnetic spectrum have the highest frequency? | X-rays and Gamma rays |
| Why do Gamma rays have high energy levels? | They have high frequency |
| What energy transformations happen when a blow-dryer is turned on? | Electrical, to Mechanical, to Thermal, and Sound |
| Mechanical energy is not the movement of gears, it is? | The sum of potential and kinetic energy of motion, and position of an object |
| If you put an ice cube into a glass of water how does thermal energy flow? | From the warmer water to the cooler ice |
| When does thermal energy count as being in equilibrium? | When the temperatures of the cooler and warmer objects are the same |
| What ray on the electromagnetic spectrum has a longer wavelength than gamma rays but shorter than UV rays. | X-Rays |
| How can X-Rays be used to benefit people? | Examine bones inside tissues |
| A skateboarder starts at the top of a hill and then goes down. When is his Gravitational potential energy the greatest? | At the Top of the hill. |
| When a skydiver falls what are 2 forms of forces involved? | Gravitational and Frictional |
| If you have a wave with a frequency of 1,000 hertz and one with a frequency of 10,000 hertz, which wave has a longer wavelength? | The wave with a frequency of 1,000 hertz |
| If you have a wave with a wavelength of 10 meters and one with a wavelength of 100 meters, which one has a lower frequency? | The wave with a wavelength of 100 meters |
| During an energy transformation in a system, is the total energy at the end greater than, equal to, or less than the total energy at the beginning? | Equal to |
| If a roller coaster goes up and down a hill, is the sum of GPE, KE, thermal energy, and sound energy going to stay the same? What is the scientific law that supports this? | The law of conservation of energy. |
| If you consider the different types of EM radiation, what type of radiation is responsible for warming the Earth’s atmosphere? | Infrared. |
| Between UV energy and visible light, which has the shorter wavelength? | UV energy |
| What type of heat transfer is the reason why you can warm your hands over a fire? | Convection - the rising heat. |
| Why can wrapping food with aluminum foil in an over change how it cooks? | Foil reflects radiant heat reduces how brown the food becomes. |
| What is the difference between contact and non-contact forces? | non-contact forces are applied at a distance and contact forces must be in direct contact |
| An object is placed on a slanted surface and remains at rest. What force causes this? | frictional forces. |
| On a speed graph, what kind of line represents positive acceleration? | A upward curved line |
| A car is speeding up on a highway. What kind of force does this represent? | An unbalanced force |
| An object is moving at a constant speed. What kind of force does this represent? | Balanced force |
| A wagon is being pulled 5 Newtons to the left, and another student is pulling it 5 Newtons to the right. What is the net force of the wagon? | Net force of zero |
| A robot is put through a challenge. It has to drive down a 200-meter-long path under 10 seconds. What would the robot's speed need to be, at minimum, to beat the challenge? | 20 m/s |
| A new design variation on a paper airplane launcher fires an airplane out at 50 m/s. The airplane goes a distance of 100 meters. How long does it take for the airplanes to reach this distance? | 2 seconds |
| A cube made out of a magnetic material is placed between two industrial magnets. One magnet is 2 times weaker than the other. The cube's motion is not changing. What is the total net force of the cube? | Net force = 0 newtons. |
| Two separate forces are pulling against the right side of an object. One of these forces is 20 newtons, and the other is 30 newtons. This object is not changing its motion. What must the force pulling on the left side equal to? | 50 newtons. |
| Todd's mass on Earth is 62 kilograms, and he weighs about 137 pounds. If he is on a planet that has one-third of Earth's gravity, what would his mass be? | 62 kilograms |
| The mass of an animal on Planet A is 10 kilograms and it weighs 50 pounds. On Planet B, that same animal would only weigh 10 pounds. Why has its weight changed? | Weight is affected by the pull of gravity |
| A car goes down the highway at a constant speed of 57mph. What causes friction in this scenario. | The roughness of the road, air resistance. |
| Lebron goes skydiving. When he jumps out of the plane he realizes that he doesn't have his parachute on. What can cause friction to slow down his fall before he hits the ground. | Air resistance. |
| When a rocket travels through space at a constant speed without any other forces acting on it. Is the object balanced or unbalanced? | Balanced |
| A car starts accelerating from a traffic signal. Is the car experiencing a balanced or unbalanced force. | Unbalanced |
| On a speed graph how do you know an object is moving at a constant speed? | Graph shows a sloped line |
| A graph shows a truck moving at a constant speed. What does the line on the graph look like? | The line would be a sloped line from the origin. |
| What is the net force of an unbalanced object? | greater than zero. |
| Two forces are acting on an object, one force is pulling to the left with 5 newtons the other force is pulling 10 newtons to the right. What is the net force of this object? | Net force = 5 units to the right. |
| Jupiter has a lot of moons because of its gravity. Is gravity a non contact force or a contact force. | Non-contact |
| If one planet is farther away from the Sun than Earth would the sun's gravity have a greater or lesser effect on the planet? | Lesser |
| What is the definition of net force in physics? | Net force is the sum of all forces acting on an object. |
| How does an unbalanced force affect the motion of an object? | It will cause a change in the object’s motion. |
| what are two ways to increase friction between two objects? | Change the surface type, increase the mass |
| Why would you want to increase the friction of a moving car? | Avoid slipping |
| Does gravity change an object’s mass? | no – the mass of an object is not affected by gravity |
| What is the effect of gravity on weight? | Stronger gravity = increase in weight, Weaker gravity = decrease in weight |
Created by:
Brewermms
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