Understanding Energy and Machines: Second Term Examination for JSS 1 Students

Examination: Edu Delight Tutors Secondary School
Basic Science
2nd Term Examination – JS1

21. A device that helps us to do work more easily and conveniently is called a
    A) Machine
    B) Load
    C) Tortoise
    D) None of the above
22. ________ is the energy possessed by an object in motion.
    A) Moving energy
    B) Hydro energy
    C) Kinetic energy
    D) Chemical energy
23. ________ is the process of changing one form of energy into another, such as the process of changing nuclear energy into heat or solar energy.
    A) Energy transfer
    B) Energy change
    C) Energy sublimation
    D) None of the above
24. Which of these products is from an animal?
    A) Wool
    B) Yam flour
    C) Lime stone
    D) Cement
25. The sun gives ________ energy used by plants to manufacture their food.
    A) Solar
    B) Chemical
    C) Water
    D) Palm oil
26. ________ is defined as the ability to do work.
    A) Power
    B) Strength
    C) Vitality
    D) Energy
27. One of these can pollute soil, leaving it infertile.
    A) Dust from cars
    B) Leaves falling from trees
    C) Oil spillage from Mechanic Park
    D) Fumes from generator
28. Energy from the sun is called ________ energy.
29. ________ is the ability to do work.
    A) Energy
    B) Weight
    C) Force
    D) Power
30. Energy contained in the food we eat is known as ________.
    A) Mechanical energy
    B) Chemical energy
    C) Heat energy
    D) Potential energy
31. The energy conversion in a moving car is ________.
    A) Electric energy – Sound energy
    B) Light energy – Sound energy

1. Work and Machines:
   • Machines are devices that make work easier and more convenient, like bicycles 🚲, pulleys, and levers.
   • Examples of machines include scissors ✂️, screwdrivers 🔧, and even simple tools like hammers 🛠️.
2. Types of Energy:
   • Energy is the ability to do work. Kinetic energy is the energy possessed by moving objects, like a rolling ball 🏀 or a running car 🚗.
   • Other forms of energy include potential energy, which is stored energy, like a stretched rubber band or a raised hammer 🔨.
3. Energy Conversion:
   • Energy can change from one form to another. For example, solar panels convert sunlight ☀️ into electricity ⚡, while batteries store chemical energy and convert it into electrical energy when needed 🔋.
4. Materials and Production:
   • Cement is a product used in construction 🏗️ and is made from materials like limestone.
   • Other products, like wool 🐑, come from animals and are used to make clothing and textiles.
5. Environmental Impact:
   • Pollution from sources like oil spills 🛢️ and fumes from generators 🚗 can harm the soil, making it infertile for plants to grow 🌱.
   • Understanding the impact of pollution helps us take steps to protect the environment 🌍 and keep our planet healthy.
6. Solar Energy:
   • The sun provides solar energy ☀️, which is essential for plants to make their food through photosynthesis 🌿.
   • This energy is crucial for sustaining life on Earth 🌎 and powering renewable energy sources like solar panels.
7. Animal Products:
   • Animal products like wool 🐑 and meat 🥩 are obtained from animals and are used for various purposes, including clothing and food.
8. Energy Types:
   • Chemical energy stored in food provides the body with the energy it needs for activities like running 🏃‍♂️, jumping, and studying 📚.
9. Energy Conversion in Cars:
   • Moving cars convert fuel energy into kinetic energy for motion, showing an example of energy conversion in action 🚗💨.

Air Pollution : Meaning and Pollutants

1. Machines are devices that make work easier and more convenient, like bicycles and ____.
   a) Scissors
   b) Pulleys
   c) Hammers
   d) Levers
2. Kinetic energy is the energy possessed by moving objects, like a rolling ball or a running ____.
   a) Car
   b) Plane
   c) Boat
   d) Bicycle
3. Solar panels convert sunlight into ____.
   a) Water
   b) Electricity
   c) Heat
   d) Sound
4. Cement is a product used in construction and is made from materials like ____.
   a) Wood
   b) Metal
   c) Limestone
   d) Plastic
5. Pollution from sources like oil spills and fumes from generators can harm the soil, making it infertile for ____ to grow.
   a) Animals
   b) Plants
   c) Rocks
   d) Water
6. The sun provides ____ energy, which is essential for plants to make their food through photosynthesis.
   a) Wind
   b) Solar
   c) Geothermal
   d) Nuclear
7. Animal products like wool and meat are obtained from animals and are used for various purposes, including clothing and ____.
   a) Shelter
   b) Food
   c) Tools
   d) Fuel
8. Chemical energy stored in food provides the body with the energy it needs for activities like running, jumping, and ____.
   a) Sleeping
   b) Studying
   c) Eating
   d) Watching TV
9. Moving cars convert fuel energy into ____ energy for motion.
   a) Electrical
   b) Thermal
   c) Kinetic
   d) Potential
10. ____ energy is the ability to do work.
    a) Heat
    b) Mechanical
    c) Sound
    d) Light
11. Examples of machines include scissors, screwdrivers, and even simple tools like ____.
    a) Hammers
    b) Saws
    c) Axes
    d) Rulers
12. Potential energy is stored energy, like a stretched rubber band or a raised ____.
    a) Ball
    b) Rock
    c) Hammer
    d) Feather
13. Solar energy is crucial for sustaining life on Earth and powering renewable energy sources like ____.
    a) Wind turbines
    b) Hydroelectric dams
    c) Geothermal plants
    d) Solar panels
14. Pollution from sources like oil spills and fumes from generators can harm the ____, affecting plant growth and biodiversity.
    a) Air
    b) Soil
    c) Water
    d) Sun
15. Machines are devices that make work easier and more convenient by converting one form of energy into _____.
    a) Heat
    b) Sound
    c) Light
    d) Mechanical

POTENTIAL AND KINETIC ENERGY

1. What are machines?
   • Machines are tools or devices that help us do work more easily, like bicycles and scissors.
2. What is kinetic energy?
   • Kinetic energy is the energy an object has because it’s moving, like a rolling ball or a running car.
3. How do solar panels work?
   • Solar panels turn sunlight into electricity that we can use to power our homes and devices.
4. What is cement used for?
   • Cement is a building material used in construction to make structures like buildings and roads.
5. How does pollution harm the soil?
   • Pollution from things like oil spills and fumes from cars can make soil unhealthy for plants to grow.
6. Why do plants need solar energy?
   • Plants use solar energy from the sun to make their own food through a process called photosynthesis.
7. What are examples of animal products?
   • Animal products include things like wool from sheep and meat from cows, which we use for clothing and food.
8. Why is chemical energy important?
   • Chemical energy stored in food gives us the energy we need to do activities like running and studying.
9. How do cars use energy?
   • Cars convert fuel energy into kinetic energy to move them forward when we drive.
10. What is potential energy?
    • Potential energy is stored energy, like when you stretch a rubber band or lift a hammer.
11. What is the importance of solar energy?
    • Solar energy is crucial for life on Earth and helps power renewable energy sources like solar panels.
12. How does pollution affect the environment?
    • Pollution can harm the air we breathe, the water we drink, and the soil that plants need to grow.
13. What are examples of simple machines?
    • Simple machines include tools like screwdrivers, hammers, and scissors that help us do work more easily.
14. How is energy used in everyday life?
    • We use energy from food to power our bodies and energy from sources like electricity to power our homes and devices.
15. Why are machines important?
    • Machines make our lives easier by helping us do work more efficiently, whether it’s cooking food or building houses.