Science · Year 5 · Animals Including Humans · Spring Term

Adulthood: Growth and Change

Investigating the process of breathing and identifying the main organs involved, such as the lungs and windpipe.

• National Curriculum Attainment Targets
• NC-KS2-Science-Y5-AIH-4

About This Topic

Adulthood marks a phase of stabilisation followed by gradual physical changes in the human body. After teenage years, young adults typically reach their maximum height, build denser bones and muscles through activity, and complete reproductive development. Into middle age and beyond, changes include greying hair, skin wrinkling, vision decline, joint stiffness, and reduced muscle mass. These shifts result from cellular aging, hormonal changes, and lifestyle factors, connecting to the full human life cycle.

This Year 5 topic builds on earlier units about puberty, nutrition, and body systems. Students address key questions on differences between child and adult bodies, such as larger organs and greater strength in adults, while noting ongoing changes like slower healing in older age. It develops skills in observation, comparison, and evidence-based discussion.

Active learning benefits this topic greatly. Students engage through measuring family members' features, constructing life-stage models, or charting changes on personal timelines. These methods turn distant concepts into relatable experiences, encourage peer sharing of family stories, and promote empathy for diverse aging paths.

Key Questions

1. What changes happen to the human body between being a teenager and a young adult?
2. Describe two ways an adult's body is different from a child's body.
3. How do adults continue to change physically as they get older?

Learning Objectives

• Compare physical characteristics of a child's body with those of a young adult's body.
• Explain two key physiological differences between a child and an adult, such as bone density or organ size.
• Identify and describe at least three physical changes that occur in the human body from young adulthood into older age.

Before You Start

Puberty and Human Development

Why: Students need foundational knowledge of the rapid changes during puberty to understand the transition into young adulthood.

The Human Skeleton and Muscles

Why: Understanding the basic structure and function of bones and muscles is essential for comparing child and adult bodies.

Key Vocabulary

Growth spurt	A rapid increase in height and weight that occurs during adolescence, leading towards adult size.
Bone density	A measure of how much calcium and other minerals are packed into a bone, which generally increases until adulthood and then may decrease with age.
Muscle mass	The amount of muscle tissue in the body, which typically increases during young adulthood and can decrease in older age.
Cellular aging	The natural process where body cells become less efficient or damaged over time, contributing to visible changes like wrinkles or slower healing.

Watch Out for These Misconceptions

Common Misconception

Adults stop all physical changes after age 20.

What to Teach Instead

Adults experience ongoing changes, such as muscle loss after 30 or bone thinning post-menopause. Timeline activities help students plot these gradual shifts using family data, revealing patterns invisible in snapshots and correcting the static view through collaborative evidence sharing.

Common Misconception

Aging changes occur suddenly at fixed ages.

What to Teach Instead

Changes like greying or wrinkling build slowly over years due to cell wear. Hands-on model modifications in groups let students layer aging effects step-by-step, fostering discussion that contrasts sudden ideas with observed gradualism.

Common Misconception

All adults age in the same way and at the same rate.

What to Teach Instead

Genetics, diet, and exercise create varied paths, as seen in diverse family examples. Peer measurement comparisons highlight individual differences, with class graphing reinforcing that active exploration uncovers variability beyond uniform expectations.

Active Learning Ideas

Timeline Construction: Human Life Stages

In small groups, students research and illustrate physical changes across life stages on a large paper timeline from birth to old age. Include key features like height peaks and aging signs, using drawings or printed images. Groups present one section to the class, noting causes of changes.

45 min·Small Groups

Measurement Pairs: Child vs Adult Features

Pairs use rulers and tape measures to record hand spans, arm lengths, and head circumferences on classmates, then compare to adult data from family or charts. Discuss differences in bone and muscle development. Graph results to visualise growth patterns.

30 min·Pairs

Model Building: Aging Skeleton

Small groups assemble skeleton models from craft materials, modifying them to show adult density versus child flexibility and elderly brittleness. Label organs like lungs that enlarge with age. Test models by simulating movements to observe changes.

40 min·Small Groups

Discussion Circle: Family Changes

In a whole class circle, students share photos or stories of family members at different ages, identifying changes like posture shifts or hair colour. Teacher charts common patterns on the board. Vote on healthy habits to slow aging effects.

25 min·Whole Class

Real-World Connections

• Doctors and nurses in pediatric and geriatric care specialize in the health needs of children and older adults, understanding the specific growth and aging processes.
• Fitness trainers design exercise programs for different age groups, considering factors like bone density and muscle mass to ensure safety and effectiveness for young adults versus seniors.
• Researchers in gerontology study the biological and social aspects of aging, investigating ways to maintain health and quality of life for people as they get older.

Assessment Ideas

Exit Ticket

Provide students with a worksheet containing two columns: 'Child' and 'Adult'. Ask them to list three physical differences they learned about, placing each difference in the correct column. For example, 'Smaller bones' under Child, 'Larger lungs' under Adult.

Discussion Prompt

Pose the question: 'Imagine you are explaining to a younger sibling what happens to a body as it grows from a child to an adult, and then into an older person. What are two important changes you would mention?' Facilitate a class discussion, noting student responses on the board.

Quick Check

Show images depicting different life stages (child, teenager, young adult, older adult). Ask students to point to or verbally identify one specific physical change visible in each transition, such as 'growth spurt' between teenager and young adult, or 'grey hair' for the older adult.

Frequently Asked Questions

What physical changes happen in adulthood for Year 5 science?

From teenager to young adult, bodies reach full height, strengthen muscles and bones, and mature reproductively. Later, greying hair, wrinkles, joint wear, and slower metabolism appear. Teach with visuals of life stages and factors like exercise influencing these, linking to healthy lifestyle choices for delayed aging effects.

How to teach human body changes to old age in Year 5?

Use timelines and models to sequence changes: stabilisation in young adulthood, then gradual declines. Incorporate real data from family measurements and discussions on nutrition's role. This builds on puberty knowledge, emphasising observation skills and empathy for elderly relatives through shared stories.

How can active learning help teach growth and change in adulthood?

Active methods like building life-stage timelines, measuring peers against adult norms, and modifying skeleton models make abstract changes tangible. Students collaborate on family data charts, discuss variations, and role-play habits affecting aging. These experiences deepen understanding, boost retention via personal relevance, and develop skills in evidence comparison over rote memorisation.

Common misconceptions about adult body changes Year 5?

Pupils often think adults freeze in development post-puberty or age uniformly and suddenly. Correct via group activities plotting real timelines and comparisons, which reveal gradual, individual paths influenced by lifestyle. Peer discussions dismantle these ideas, replacing them with evidence from models and measurements.