Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 20: End of chapter review
Mark Levesley Science Solutions for Exercise - Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 20: End of chapter review
Attempt the free practice questions from Exercise 20: End of chapter review with hints and solutions to strengthen your understanding. Cambridge Lower Secondary Science Stage 7 : Student's Book solutions are prepared by Experienced Embibe Experts.
Questions from Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 20: End of chapter review with Hints & Solutions
A student made six batches of bread dough and left each at a different temperature for 30 minutes. The student then measured the increase in height of each dough. The table shows the results.
| Temperature (C) | Increase in height after 30 minutes (mm) |
| 5 | 0 |
| 10 | 2 |
| 15 | 9 |
| 20 | 19 |
| 25 | 28 |
| 30 | 35 |
Which variable did the student change?
A student made six batches of bread dough and left each at a different temperature for 30 minutes. The student then measured the increase in height of each dough. The table shows the results.
| Temperature (C) | Increase in height after 30 minutes (mm) |
| 5 | 0 |
| 10 | 2 |
| 15 | 9 |
| 20 | 19 |
| 25 | 28 |
| 30 | 35 |
State two variables that should be kept the same.
A student made six batches of bread dough and left each at a different temperature for 30 minutes. The student then measured the increase in height of each dough. The table shows the results.
| Temperature (C) | Increase in height after 30 minutes (mm) |
| 5 | 0 |
| 10 | 2 |
| 15 | 9 |
| 20 | 19 |
| 25 | 28 |
| 30 | 35 |
Which variable did the student measure?
A student made six batches of bread dough and left each at a different temperature for 30 minutes. The student then measured the increase in height of each dough. The table shows the results.
| Temperature (C) | Increase in height after 30 minutes (mm) |
| 5 | 0 |
| 10 | 2 |
| 15 | 9 |
| 20 | 19 |
| 25 | 28 |
| 30 | 35 |
Use the evidence in the table to make a conclusion.
A baker added some yeast cells to water containing sugar. The number of yeast cells increased for 10 hours, and then stopped increasing.
Which life process caused an increase in the number of cells? (Reproduction/Respiration)
A baker added some yeast cells to water containing sugar. The number of yeast cells increased for 10 hours, and then stopped increasing.
Suggest why the number of cells stopped increasing.
Some scientists do not think that viruses are organisms. Explain why not.
Measure the yeast cell in the above figure and calculate its size in real life.
