Year 8 Science · Unit 1 · Lesson 12

Removing Waste

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

waste excretory system input output balance removal cells digestion

Living systems need both useful materials entering (called ) and substances leaving (called ). Once use materials, they produce products. If these are not removed, they can build up and disrupt how the system functions. The has the role of certain wastes from the body. Managing both inputs and outputs helps the body maintain .

Your Turn

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Living things only need to focus on taking in useful materials, waste removal is not important for survival.

Correct it:

T
F

If waste products build up in a living system, they can interfere with cell function and disrupt the system's balance.

Correct it:

T
F

The excretory system is responsible for bringing nutrients into the body so cells can use them.

Correct it:

T
F

Both inputs (bringing materials in) and outputs (removing wastes) are needed for a living system to keep functioning properly.

Correct it:

T
F

Show What You Know

1. Explain in your own words why waste removal is just as important as taking in food and water for a living system. Use the word balance in your answer.

Recall 2 marks

2. Complete the table by matching each system to its role as an input or output system. One example is done for you.

Recall 3 marks
SystemInput or output role?Brief description of role
Digestive systeminputbrings nutrients from food into the body
Excretory system
Respiratory system
Circulatory system

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 8 Science · Unit 1 · Lesson 12 · Foundation Worksheet