Science / Year 7 / Science understanding / Physical sciences

Curriculum content descriptions

investigate and represent balanced and unbalanced forces, including gravitational force, acting on objects, and relate changes in an object’s motion to its mass and the magnitude and direction of forces acting on it (AC9S7U04)

Elaborations
  • investigating the effects of applying different forces to familiar objects of the same and different mass
  • analysing the effect of balanced and unbalanced forces on an object’s motion, such as starting, stopping and changing direction
  • measuring the magnitude of a force using a force meter and representing the magnitude and direction of forces acting on an object using force arrow diagrams
  • investigating how Earths gravitational force is the attractive force which pulls objects to the centre of Earth and its magnitude is related to the mass of an object
  • investigating how simple machines such as levers and pulleys are used to change the magnitude of force needed to perform a task
  • examining how gravity affects objects in space, including moons, planets, stars, galaxies and black holes
  • analysing the forces acting on boomerangs and how early First Peoples of Australia designed an air foil profile which allowed for multiple variations and applications
  • investigating the effect of forces through the application of simple machines, such as the bow and arrows used by Torres Strait Islander Peoples or the spearthrowers used by First Peoples of Australia
General capabilities
  • Critical and creative thinking Critical and Creative Thinking
ScOT terms

Gravity,  Paper crafts,  Machinery,  Reciprocal actions

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Cardboard train wheels | Questacon

In this activity, students explore how train wheels are designed for stability on straight or curved rail. Students make two different models of train wheels from paper cups, observe how they perform on their homemade rail and compare the behaviour of their designs. The activity includes a list of what is required, suggestions ...

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Biomimicry glider

In this lesson students explore the dynamics of flight by examining animal adaptations and apply their learning to think like an aeronautical engineer and design their own glider

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Balancing Sculptures

This activity invites students to explore balance and stability by designing and building whimsical kinetic sculptures that tilt, slide, and suspend everyday objects and ordinary materials into surprising arrangements. Students explore stability, centres of gravity, balanced forces and symmetry through this hands-on, tactile ...

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Water turbine | Questacon

In this activity, students make and test a simple water-driven turbine. The activity includes a list of what is required, suggestions of what to do and notice, questions to ask, an explanation for the underlying science of what students observe and suggestions for other related activities.

Downloadable

Construct a lifting machine - teacher resource kit

This activity kit challenges students to design and create a machine to lift a load to a height of at least 50cm. Activities are guided by the design thinking process, and scaffold students to undertake research on the applications of various simple machines, and the combinations of simple machines they might use to help ...

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Cranky Contraptions

This activity invites students to make Cranky Contraptions, kinetic sculptures that animate a character or scene when a handle is turned. These automata are powered by a simple crank slider mechanism which provides the basic motion. Everyday materials around can be repurposed into these contraptions. The activity includes ...

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Cardboard Automata

This activity invites students to explore simple mechanical elements such as cams, levers, and linkages, while creating a moving sculpture. This activity is simple to start but may become more and more complex as students become familiar with possible motions and imagine ways to artistically decorate their contraption. ...

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reSolve: Modelling Motion - Year 7

This sequence of seven lessons challenges students to use simple equipment to predict, observe and represent motion. They create a series of graphs to represent motion and construct instruments to measure forces in one and then two dimensions. They interpret these representations to develop concepts of force and motion. ...

Interactive

experiMENTALS: Bouncing balls

This resource contains a materials and instruction list and brief explanation for students to observe what happens when two different sized balls are dropped independently or in vertical contact. The simple explanation relates to transfer of energy.

Interactive

experiMENTALS: Gravity defying wheel

This resource contains a materials and instruction list and brief explanation for students about the process of demonstrating resistance to change in a spinning a bike wheel to observe the principles of a gyroscope.

Interactive

experiMENTALS: Levitating balloon

This resource contains a materials and instruction list and brief explanation for students about the process of levitating a balloon.

Interactive

experiMENTALS: Keys on a shoelace

This resource contains a materials and instruction list and brief explanation for students to show that keys on a shoelace can do some unexpected things.

Interactive

experiMENTALS: Magic rocking candle

This resource contains a materials and instruction list and brief explanation for students about the process of burning both ends of a balancing candle. This activity is most likely to be done as a teacher demonstration for safety and classroom management reasons, particularly at primary school level.

Interactive

experiMENTALS: Trumpet straw

This resource contains a materials and instruction list and brief explanation for students about the process of making a straw that can produce vibrations when blown through.

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Experimentals: Do different things fall faster?

Want to find out what happens when you drop a watermelon and an apple from the top of a building? In this clip, Bernie Hobbs and Ruben Meerman, investigate whether the mass of an object influences how fast it falls. Bernie and Ruben ride the 'Giant Drop' at Dreamworld, drop a watermelon and apple from an eighth floor balcony, ...

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Elliot and the Surfing Scientist: Make a lava lamp model using oil and water

Imagine making your very own lava lamp using materials from your kitchen and bathroom. Watch the Surfing Scientist team show you how it can be done, then try and figure out why it works.

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Catalyst: The physics of a slinky drop

Imagine holding a slinky by the top end, with the bottom end dangling in mid-air. What do you think would happen when you let it go? Explore the physics of two equal and opposing forces working on an object in this awesome experiment!

Video

Anatomy of a raindrop

The water cycle is the circulation of water on, in and above Earth and it involves a number of stages and changes of state. This clip describes the water cycle and also how modern technology has contributed to our understanding of the shape of raindrops and its relationship to precipitation. Discover how raindrop shape ...

Interactive

Give me a brake

Investigate braking efficiency of cars and trucks by testing stopping distances under controlled conditions. Test effects of vehicle type, tyres, road surface and weather conditions. Choose driving speed, then apply brakes and compare stopping distances. Estimate distances from target markers. Answer questions about antilock ...

Interactive

It's a drag

Investigate the braking efficiency of cars and trucks. Test stopping distances under controlled conditions. Compare effects of vehicle type, tyres, road surface and weather conditions. Choose driving speed, then apply brakes and compare stopping distances. Answer questions about friction, tyres and driver fatigue. This ...