Science / Year 7 / Science as a Human Endeavour / Nature and development of science

• TLF-IDL5774

Control the motion of the Earth in its orbit around the Sun. Work out how the Earth’s orbit and the tilt of its axis determine seasons in the different hemispheres. Work out how the Earth’s orbit and the tilt of its axis determine day length in the different hemispheres. Examine the heating effect of the Sun. Compare seasons ...

• TLF-IDL1

Follow the passage of food through the human body. Select foods and drinks and decide how to digest them. For example, choose to chew, to add saliva to the mouth or add gastric juices to the stomach. Watch how the body reacts to changes. Find out more about digestion along the way and answer questions.

• TLF-IDL2011

Join a team of palaeontologists working on an Australian megafauna dig site. Dig up and describe a megafauna jaw bone or skull. Use tools such as a pick, rock hammer and scraping knife. Prepare the fossil for removal using tools such a fine brush, glue and plaster. See how the features of the bone are used to identify the ...

• TLF-IDM014089

This is a unit of work designed to help students investigate the similarities and differences between a range of organisms including plants, animals and micro-organisms. Students use these variations to organise and classify organisms according to accepted hierarchial categories. They examine the need for scientists to ...

• TLF-IDM016472

This six and a half minute video segment from Catalyst explains Earthshine as light from our own Earth reflected back from the Moon's dark side. A PhD student is studying it to learn about how light reflects from a planet that contains liquid water as well as land. Her work may one day lead to the discovery of other planets ...

• TLF-IDM017609

Spinosaurus, perhaps the biggest and fiercest predatory dinosaur ever, hunted and ate the huge, 8-metre long sawfish called Onchopristis. Watch this clip to discover what special adaptations Spinosaurus had for fishing out its large prey. Like a cross between a Tyrannosaurus and a crocodile, this dinosaur was a massive ...

• TLF-IDM016174

This program deals with a range of human impacts on the Great Barrier Reef. Herbicides from land runoff have been traced to algae and sea grasses in river mouths and coastal zones along the Great Barrier Reef. Effects include retardation of photosynthesis and growth of corals. Other pressures on the reef include high water ...

• TLF-IDM020174

Watch and listen as Dr Graham Phillips explains what has been discovered about our universe in the last decade or so. What did the WMAP satellite study? What did it confirm? The scientists in this story talk about being surprised to find that the universe is expanding at an increasing pace. What do they say is responsible ...

• TLF-IDM020213

Visual art and science are often considered to be separate fields. Watch as Phred Petersen talks about the way he combines his passions of photography and science. What is the role of technology in enabling this crossover? What kinds of scientific discoveries can be assisted by high-speed photography? And how can scientific ...

• TLF-IDM018812

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 ...