Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 19: Exercise 19

Author:Mark Levesley, Chris Meunier, Fran Eardley & Gemma Young

Mark Levesley Science Solutions for Exercise - Mark Levesley, Chris Meunier, Fran Eardley and, Gemma Young Solutions for Exercise 19: Exercise 19

Attempt the free practice questions from Exercise 19: Exercise 19 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 19: Exercise 19 with Hints & Solutions

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 2 - Microorganisms and Disease>Exercise 19>Q 5

What is a decomposer?

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 2 - Microorganisms and Disease>Exercise 19>Q 5

Explain why decomposers are important.

HARD
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 2 - Microorganisms and Disease>Exercise 19>Q 6

A scientist took four containers, each containing 100g of dead plants. The scientist added decomposers to each container for 30 days. The table shows the results.

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(a) Which variable did the scientist change?

(b) State two variables that should be kept the same.

(c) Which variable did the scientist measure?

(d) Use the evidence in the table to make a conclusion.

HARD
Lower Secondary Stage 7
IMPORTANT
Cambridge Lower Secondary Science Stage 7 : Student's Book>Chapter 2 - Microorganisms and Disease>Exercise 19>Q 7

Unleavened bread, such as AI Jajab bread eaten in the United Arab Emirates, is made without yeast. Suggest a difference between AI Jajab bread and the bread in figure 2.14. Explain your reasoning.

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Figure 2.14