Complete the word equation for aerobic respiration. _____+oxygen → Carbon dioxide+ _____

Glucose + Oxygen → Carbon dioxide + Water Aerobic respiration is a type of cellular respiration that occurs in the presence of oxygen. It takes place in the mitochondria and requires oxygen and glucose, and produces carbon dioxide, water, and energy.

Yuri makes a model of the lungs as shown below. When Yuri pulls down on the rubber sheet, the balloon gets bigger. Explain why.

When yuri pulls down on the rubber sheet, the balloon gets bigger as the volume of the jar increases and the pressure therefore decreases and the air is drawn in through the glass tube inflating the balloons, which represent the lungs. When the rubber sheet is pushed upwards into its original shape, the balloons become deflated.

Yuri makes a model of the lungs as shown below. Predict what would happen if he pushed the rubber sheet upwards. Explain your prediction.

When the rubber sheet is pushed upwards into its original shape, the balloons become deflated. This is because the air volume inside the bell jar decreases, thus increasing the air pressure. As a result, the volume of the balloons decreases and the pressure increases. Air is forced out of the balloons. The balloons act as the lungs.

E M B I B E

Cambridge Lower Secondary Science Stage 8 : Workbook>Chapter 2 - Respiration and Circulation>Exercise 2

Aidan Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Respiration and Circulation, Exercise 2: Exercise 2

Author:Aidan Gill, Heidi Foxford & Dorothy Warren

Aidan Gill Science Solutions for Exercise - Aidan Gill, Heidi Foxford and, Dorothy Warren Solutions for Chapter: Respiration and Circulation, Exercise 2: Exercise 2

Attempt the free practice questions on Chapter 2: Respiration and Circulation, Exercise 2: Exercise 2 with hints and solutions to strengthen your understanding. Cambridge Lower Secondary Science Stage 8 : Workbook solutions are prepared by Experienced Embibe Experts.