Science 5 Quarter 3 Module 1 Week 1: Let's Understand (Study The Concept)
Science 5 Quarter 3 Module 1 Week 1: Let's Understand (Study The Concept)
Science 5 Quarter 3 Module 1 Week 1: Let's Understand (Study The Concept)
We use time to compare and measure speed at which things move. Time is measured in a
variety of ways, usually with a watch or a clock. Time can be calculated in seconds, minutes, hours,
days, weeks, etc. An hour for example can be converted to minutes by multiplying it by 60
and a minute can be converted into seconds by multiplying it also by 60. We usually use a stopwatch
to precisely measure time in minutes, seconds, and fractions of seconds. Speed is the distance
travelled by an object in a certain time.
Distance is the length of the path between two points. When an object moves in a straight
line, the distance is the length of the line connecting the object’s starting point and its ending point.
Distance is measured in centimeters, meters, kilometers, or miles.
Formula:
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When there is a change in time or distances, the average speed is calculated by using the
formula:
Average speed = Average Distance
Average Time
Since speed, distance and time are related, we can calculate distances and times by the simple
arrangement of the formula.
Distance = speed x time
Time = Distance
Speed
Velocity is the speed of the object in a particular direction. The speed of any object in motion
is the rate at which the object moves. To find the speed, you have to answer two basic question: “How
far does the object move?” and “How long does the object move?” Speed depends on the distance
traveled and the length of time traveled. A meter or a kilometer is used to measure the distance. More
often, the meter is used for measuring short distances while a kilometer is used for measuring long
distances like those on the roads.
Formula:
Let’s Analyze
A. Read the following questions and answer briefly. Write your answer on the space
provided below.
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B. Read and perform the following procedures and answer the questions that follow.
1. From the starting point, push the bag so that it travels certain distance.
2. Measure and record the distance it travels.
3. From the reference position, push your bag to the right. Record the distance it travelled for 10
seconds.
4. Drop the books for at least one meter. Record the time it reaches the floor.
5. Pull your chair sideward. Observe what happens?
Questions:
1. What happened to the bag? ______________________________
2. How long does it take the bag to reach the floor? _______________________
3. What is the distance travelled by the bag for 10 seconds? _________________
4. What did you apply to make the objects move? ___________________________
5. When do we say that the object is moving? ______________________________
Let’s Evaluate
A. Read the following word problems and encircle the letter of the correct answer.
1. Earlier I drove 180 minutes at a speed of 150mph. How many miles did I drive?
A. 27,000 mph B. 16,000 mph C. 26,000 mph D. 25,000 mph
2. Sam drove from Quezon City to Paranaque in 4 hours. He travelled at a constant speed of
120 miles per hour. How far is it from Quezon City to Paranaque?
A. 580 mph B. 480 mph C. 380 mph D. 680 mph
3. A man travels 315 miles at a speed of 60 mph. How long the journey lasts? Give your
answer in hours.
A. 3.25 km/hr B. 5.25 km/hr C. 4.25 km/hr D. 6.25 km/hr
4. Manny rides his bicycle for 4 hours at a speed of 503km/h. What is the distance.
A. 200 km/hr B. 300 km/hr C. 400 km/hr D. 500 km/hr
5. Jas needs to walk 2 hours to reach her school which is 5 km away. At what speed does
she travel.
A. 2.5 km/hr B. 3.5 km/hr C. 4.5 km/hr D. 5.5 km/hr
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B. Write T if the statement is true. If it is false, change the underlined word/s to make the
statement correct.
1. The measure of how far or near two points are from one another is called distance.
2. Speed can be calculated by multiplying the distance cover by an object in motion by the
amount of time spent to cover the distance.
3. Motion is a change in position with respect to a reference point.
4. Velocity is the speed of the object in a particular direction.
5. Distance is measured in meters per second (m/s) or kilometers per hour (kph).
Let’s Create
How do you travel to school? Do you ride a vehicle or not? How far do you think is your house from
your school? Draw a simple map of your route from your house to school. Use the box below.