A 400m spriter ran on a watered field. Describe the 2 forces that will enable her to complete the race successfully
Teaching the topic of change of state of matter to JHS 1 students can be exciting and engaging by following the steps below:
1. Introduction: Introduce the topic by explaining what a state of matter is and discuss the three different states of matter (solid, liquid, and gas) that we commonly find in our environment.
2. Definition: Define the concept of a change of state of matter as the transformation of matter from one state to another due to a change in temperature or pressure conditions.
3. Examples: Provide some examples of change of state of matter like melting of ice, boiling of water, evaporation of liquid from a surface, sublimation of dry ice, and freezing point of water.
4. Demonstration: Set up a demonstration experiment to show the change of state using water. Boil water and let the students observe what happens to the water as it changes to steam.
5. Vocabulary: Teach the vocabulary words such as melting, freezing, boiling, evaporation, and condensation in relation to the change of state of matter.
6. Graphic Organizer: Use a graphic organizer such as a flowchart, chart, diagram or Venn diagrams to illustrate the process of changing states of matter.
7. Discussion: Facilitate a discussion on the different applications of the concept of change of state of matter in everyday life, such as cooking, refrigeration, power generation, and various industrial processes.
8. Practical: Allow students to conduct individual or group practical activities like measuring the boiling and freezing points of water, observing crystals forming from evaporation or sublimation, and measuring volumes etc.
9. Assessment: Assess students' understanding of the topic by asking them to give examples of different instances when they have observed a change of state of matter.
Conclusion:
Teaching the concept of change of state of matter to JHS 1 students can enhance their scientific knowledge about the world around them through exploration and experimentation. By following the above steps, students will not only understand the concepts but will also learn the practical applications of these concepts.
The two forces that will enable the sprinter to complete the race successfully are:
1. Friction force: When the athlete pushes against the ground with her feet, the ground pushes back with an equal and opposite force. This force is called the friction force. The friction force between the athlete's shoes and the watered field provides the necessary grip to propel her forward.
2. Air resistance force: As the sprinter runs, she has to push against the air in front of her. Air resistance force or drag force opposes the motion of the athlete through the air. However, when running on a watered field, the air resistance force is reduced due to the water droplets in the air, which makes it easier for the sprinter to move swiftly.
A small ball is dropped in a bowl or pool of porridge. Explain what happens and the force at work
When a small ball is dropped in a bowl or pool of porridge, the ball will sink into the thick liquid and eventually stop moving due to the resistance of the porridge. The porridge is a non-Newtonian fluid, which means it doesn't behave like a typical liquid or solid, but instead changes its viscosity based on the force applied to it.
As the ball sinks into the porridge, it creates a depression in the porridge around it. This depression creates a greater resistance to the motion of the ball, which slows down its descent. The ball will eventually stop moving when the downward force of gravity is balanced by the upward force of the porridge. The force at work is the resistance force of the porridge which is proportional to the velocity of the ball through the porridge. This resistance force is also known as the drag force. As the velocity of the ball decreases due to the opposition of the porridge resistance, the drag force reduces until a point of equilibrium is reached between the downward force of gravity and the upward force of the porridge.
Steps to take to determine the density of an empty box of whiteboard markers for J.H.S 1 students
To determine the density of an empty box of whiteboard markers, JHS 1 students should follow the steps below:
Materials:
- Empty box of whiteboard markers
- Ruler or tape measure
- Balance (or scale)
- Calculator
- Water
- Graduated cylinder
Procedure:
1. Measure the dimensions of the box (length, width, and height) using a ruler or tape measure.
2. Calculate the volume of the box by multiplying the length, width, and height measurements together.
3. Weigh the box on a balance and record the mass in grams.
4. Fill the graduated cylinder with water and record the initial volume.
5. Place the empty box of whiteboard markers in the graduated cylinder, taking care not to overflow the water.
6. Record the new volume reading on the graduated cylinder.
7. Calculate the volume of water displaced by the box by subtracting the initial volume from the new volume reading.
8. Calculate the density of the box by dividing the mass of the box (in grams) by the volume of the box (in cubic centimeters).
Density = Mass of box (g) / Volume of box (cm3)
9. Record the density value in g/cm3.
Conclusion:
The density value recorded represents the amount of mass per unit volume of the empty box of whiteboard markers. With the above steps, JHS 1 students can determine the density of an empty box of whiteboard markers.
How can you teach the topic: change of state of matter to J.H.S 1 students
State and explain four benefits of school community partnership
School community partnership is an essential aspect of the education system that is beneficial to both the school and the community at large. The following are four benefits of school community partnership:
1. Improved academic performance: When schools and communities work together, schools can provide better educational programs, resources, and support to help students excel academically. Community resources such as libraries, museums, and after-school programs can complement the school's curriculum to enhance students' academic performance.
2. Enhanced student motivation: The support of the community can help increase student motivation to learn by showing students that their education is valued and worthwhile. Community members can serve as role models for students and provide them with positive feedback and encouragement, which can motivate students to work harder and achieve their goals.
3. Increased parental involvement: School community partnerships can increase parental involvement in their child's education, leading to better outcomes for students. Parents can volunteer in schools and provide support for extracurricular activities to enhance their child's educational experience. This involvement can also help parents better understand their child's academic progress, leading to improved parent-teacher communication.
4. Community engagement: School community partnership promotes community engagement and develops partnerships between schools and community organizations. Such partnerships can enhance the community's sense of ownership and contribution to the school system through joint projects, fundraisers, and community learning events.
In summary, school community partnership is a collaborative effort that benefits both schools and communities, leading to improved academic performance, enhanced student motivation, increased parental involvement, and community engagement.
To describe the two forces that enable the sprinter to successfully complete the race on a watered field, we need to consider the principles of physics. In this scenario, the two significant forces at play are the force of friction and the force of gravity.
1. Force of Friction: Friction is a force that opposes the motion between two surfaces in contact. When the sprinter runs on a watered field, the force of friction between her feet and the wet surface helps her maintain traction and push off against the ground. This force allows her to have a firm grip on the track and propel herself forward. Without sufficient friction, her feet would slip, making it challenging to generate enough forward momentum. Therefore, the force of friction between her feet and the watered track is crucial for her to successfully complete the race.
2. Force of Gravity: The force of gravity pulls all objects towards the center of the Earth. It acts vertically downward and affects every object, including the sprinter. During the race, gravity helps the sprinter stay connected to the ground, allowing her to maintain balance and push against the track. It provides stability by keeping her feet grounded and helping her maintain a stable running posture. Without the force of gravity, the sprinter would not be able to maintain her position and exert the necessary downward force for each step.
In summary, the two forces that enable the sprinter to successfully complete the race on a watered field are the force of friction between her feet and the wet surface, which provides traction and the ability to push off against the ground, and the force of gravity, which helps her maintain balance and stability by keeping her connected to the track.