EVALUATE
MULTIPLE CHOICE. Answer the following questions by choosing the best option.
1. In an investigation, a child drops a ball from a ladder and watched it fall to ground. What is the force
that pulls the basketball to the ground?
A. Gravity
B. Friction
C. Acceleration
D. Mass
2. Why does the Moon orbit the Earth?
A. There is magnetic attraction between the Earth and the Moon.
B. There is a mechanical attraction between the Earth and the Moon.
C. There is gravitational attraction between the Earth and the Moon.
D. There is chemical attraction between the Earth and the Moon.
3. The strength of gravity between two object depends on their
A. size
B. volume
C. mass
D. shape
4. Wooden steps may get slippery when they are wet. How could you make them less slippery? Select all
that apply.
A. Increase friction.
B. Give the steps a rougher surface.
C. Use non-slip treads.
D. Cover the steps with paint that contains sand.
E. Polish with grease.
5. Engine oil reduces friction between the moving parts in a car engine by
A. making the parts sticky so that they move more slowly
B. making the parts slippery
C. warming the engine
D. cooling the engine
ESSAY. Answer the following questions:
1. Discuss the concept of friction and its various aspects as outlined in the provided text. Explain why
friction occurs between two surfaces in contact, emphasizing the role of surface atoms and the
occurrence of cold welds at points of contact. Elaborate on the advantages and disadvantages of friction
in different situations, including its significance in everyday life and its impact on motion, grip, and wear
in machinery. Analyze the role of lubricants in reducing friction in machinery and the use of other
methods to minimize friction in specific scenarios. Finally, explain the phenomenon of friction producing
heat and provide examples of its practical applications and challenges, suc as warming hands and
causing overheating in car engines.
2. Explore the fundamental concepts of gravity based on the information provided in the text. Describe
the historical perspective of gravity and its role in the formation of celestial bodies in our solar system
and beyond. Explain the traditional definition of gravity as a force of attraction between objects with
mass, considering how even small objects exert gravity on others and how gravity can act over long
distances. Discuss the factors influencing the strength of gravitational force between objects, including
the mass and distance between them. Elaborate on the effects of gravity on Earth, the moon, and
artificial satellites, and how it plays a crucial role in celestial bodies' orbits and movements. Finally,
describe the relationship between gravity and weight, how weight is measured, and the variation in
weight on Earth and other celestial bodies. Provide real-world examples to illustrate the concepts and
offer a comprehensive understanding of the role and significance of gravity in the universe.
LET-LIKE QUESTIONS
Module 1
Answer the following questions by choosing the best option.
1. How do magnetic forces affect the movement of objects?
A. They only attract objects without changing their movement.
B. They can only change the direction of an object's movement.
C. They can both change the amount and direction of an object's movement.
D . They have no effect on the movement of objects.
2. What is the main objective of the treasure hunt activities incorporated in lessons?
A. To create a map-based game for adults and children
B. To teach map reading concepts in a fun and educational way
C. To set up a course for different groups in an elementary class
D. To observe caution while engaging in the activity
3. Which of the following statements accurately describes the relationship between force and the
change in shape of an object?
A. A force always results in a permanent change in the shape of an object.
B. A force can only change the shape of an object if it involves stretching a rubber band.
C. Some objects regain their shape after the removal of force, while others do not.
D. A force can only change the shape of an object if it involves colliding
4. What would happen if you cut the bar magnet along the line between the north and south poles?
A. The magnet would lose its magnetic properties.
B. The resulting pieces would each have a north and a south pole.
C. The magnetic force would increase between the two pieces.
D. The resulting pieces would become independent magnets.
5. When a football is kicked, its shape changes for a fraction of a second. This is because:
A. force changes the shape of an object
B. force does not change the shape of an object
C. momentum changes the shape of an object
D. motion changes the shape of an object
6. How is a force typically described?
A. A scalar quantity that causes motion
B. A vector quantity that causes motion
C. A scalar quantity that describes acceleration
D. A vector quantity that describes acceleration
7. Which of the following statements best explains the usefulness of basic units in the SI (International
System of Units)?
A. Basic units provide a universal and standardized system of measurement that allows scientists from
different countries to communicate and collaborate effectively in their research.
B. Basic units eliminate the need for complex conversions, making it easier for scientists to perform
calculations and analyze data in their experiments.
C. Basic units are based on the most fundamental properties of nature, ensuring accuracy and precision
in scientific measurements.
D. Basic units allow for a more efficient and cost-effective production of measurement instruments and
devices used in scientific experiments.
8. What kind of speed is registered by an automobile speedometer average speed or instantaneous
speed?
A. Instantaneous speed
B. Average speed
C. Both instantaneous and average speeds simultaneously
D. Neither instantaneous nor average speed
9. What distance would a car travel if it moved at an average speed of 60km/h for 4 hours?
A. 40km
B. 120 km
C. 160 km
D. 240 km
10. A scientific experiment measures temperature in degrees Celsius. If the temperature is 50 degrees
Celsius, what is the equivalent temperature in Kelvin?
A. 323 K
B. 323.15 K
C. 323.3 K
D. 323.5 K
11. The density of a substance is 8.92 grams per cubic centimeter (g/cm³). What is the equivalent
density in kilograms per cubic meter (kg/m³)?
A. 892 kg/m²
B. 8,920 kg/m³
C. 89,200 kg/m²
D. 892,000 kg/m³
12. Which sentence is NOT a true description of the effect of Earth's gravity on objects?
A. Only objects with mass are affected by Earth's gravity.
B. The closer the objects are to Earth, the more affected they are byEarth's gravity.
C. The farther away objects are from Earth, the less affected they are by Earth's gravity.
D. Only objects that touch Earth are affected by Earths' gravity.
13. Milton is conducting an experiment to see how far a marble will roll when he releases it at the top of
an inclined plane. Why does the marble speed up as it travels down the inclined plane?
A. The marble has a greater mass as it travels faster.
B. The force of gravity pulls the marble down the inclined plane.
C. The marble has less magnetic attraction to the inclined plane as it travels.
D. The force of friction is reduced because the marble's surface is smooth.
14. What factors affect friction between two surfaces?
A. Amount of force pressing the surfaces together
B. Smoothness of the two surfaces
C. Weight on of the object on top
D. All of the above
15. Which of the following statements best explains the phenomenon of heat production due to
friction?
A. Friction causes the molecules on rubbing surfaces to slow down. leading to an increase in
temperature and heat production.
B. Friction creates a frictionless surface between rubbing objects, reducing energy exchange and
preventing heat production.
C. Friction accelerates the movement of molecules on rubbing surfaces. resulting in increased energy
and higher temperatures, leading to heat production.
D. Friction eliminates any molecular movement on rubbing surfaces, causing a decrease in temperature
and inhibiting heat production.
