pisa reviewer presentation for grade pisa.pptx

reviewer

1. If the formula applies to Heiko’s walking and Heiko takes 70 steps per minute, what is Heiko’s pacelength ? Show your work.

2. The picture shows the footprints of a man walking. The pacelength P is the distance between the rear of two consecutive footprints . For men, the formula, = 140, gives an approximate relationship between n and P where, n = number of steps per minute, and P = pacelength in metres .   To find Heiko's pacelength , we use the formula: = 140  

3. Rearranging the formula to solve for P ( pacelength ), we get: 𝑃 =   Since Heiko takes 70 steps per minute (so n=70): 𝑃 = = 0.5 𝑚𝑒𝑡𝑟𝑒𝑠 Therefore, Heiko’s pacelength is 0.5 metres  

4. Since 1980 the average height of 20-year-old females has increased by 2.3 cm, to 170.6 cm. What was the average height of a 20-year-old female in 1980? Answer: _______ c To find the average height of a 20-year-old female in 1980, we can use the information given: - The current average height of 20-year-old females is 170.6 cm. - The increase in height since 1980 is 2.3 cm. Step 1: Set up the equation We know that the height increased by 2.3 cm over the period since 1980. So, if we subtract the increase from the current height, we can find the height in 1980: Height in 1980 = Current height - Increase in height

5. Step 2: Perform the calculation Substitute the values into the equation: Height in 1980 = 170.6 cm - 2.3 cm = 168.3cm Final Answer: The average height of a 20-year-old female in 1980 was 168.3 cm

6. What is the approximate distance from the starting line to the beginning of the longest straight section of the track? A. 0.5 km B. 1.5 km C. 2.3 km D. 2.6 km

7. To determine the approximate distance from the starting line to the beginning of the longest straight section of the track, the learners should examine the track map provided. Look for the longest continuous straight section and identify its starting point relative to the starting line. From the given options: • A. 0.5 km: This suggests the straight section begins very close to the starting line. • B. 1.5 km: This implies a moderate distance before reaching the straight section. • C. 2.3 km: Indicates the straight section starts much further along the track. • D. 2.6 km: Places the starting point of the straight section very near the end of the options provided. Given the map details that the longest straight section begins at 1.5 km from the starting line, the correct answer to the question is: B. 1.5 km: This means that the longest straight section starts at a moderate distance along the track, as indicated by the map.

8. Where was the lowest speed recorded during the second lap? A. at the starting line. B. at about 0.8 km. C. at about 1.3 km. D. halfway around the track.

9. What can you say about the speed of the car between the 2.6 km and 2.8 km marks? A. The speed of the car remains constant. B. The speed of the car is increasing. C. The speed of the car is decreasing. D. The speed of the car cannot be determined from the graph

10. INTERNET RELAY CHAT Mark (from Sydney, Australia) and Hans (from Berlin, Germany) often communicate with each other using “chat” on the Internet. They have to log on to the Internet at the same time to be able to chat. To find a suitable time to chat, Mark looked up a chart of world times and found the following:

11. Refer to the statements and diagram on the right. Choose 1 answer. At 7:00 PM in Sydney, what time is it in Berlin? The time interval between 7:00 PM in Sydney and 10:00 AM in Sydney is 9 hours. Hence, adding 9 hours in Berlin will result to 10:00 AM in Berlin.