Download presentation
Presentation is loading. Please wait.
1
mollusc marine paralyse crevices entirely expel cavity camouflage
Focus words mollusc marine paralyse crevices entirely expel camouflage cavity vision intelligence blur propulsion interfere Year 4 Unit 26 © Rising Stars UK Ltd 2018
2
Prefixes pro- ex- para- Year 4 Unit 26 © Rising Stars UK Ltd 2018
3
Definitions marine describes something to do with, or found in, the sea mollusc a sea creature with a soft body like a slug or octopus; they can have shells to protect them intelligence the ability to learn and put that learning into practice; cleverness camouflage to hide cleverly by blending into the surroundings expel to force something out or upwards paralyse to be unable to move Year 4 Unit 26 © Rising Stars UK Ltd 2018
4
Definitions crevices narrow openings in a rock or wall entirely
with no part left out; completely blur to make unclear; a shape or area that can’t be seen clearly vision what you can see propulsion moving forward by force interfere to get in the way of something; to make something difficult cavity a space or hole in something solid, such as a body or wall Year 4 Unit 26 © Rising Stars UK Ltd 2018
5
The Octopus by Kate Ruttle
Octopuses are members of a family of creatures called ‘cephalopods’, which are marine creatures with a head and a number of pairs of arms. They are known for their intelligence, their ability to camouflage themselves and the fact that they can move by jet propulsion. How do they move? An octopus will move in different ways for different purposes. It can walk slowly along the sea bottom on its arms, if it’s neither threatened nor particularly hungry. If it needs to move faster, it can flex its arms and body to swim. If it’s escaping from a predator, it will expel a jet of water from its body cavity and zoom away as fast as it possibly can. Year 4 Unit 26 © Rising Stars UK Ltd 2018
6
The Octopus by Kate Ruttle
What do they eat? Bottom-dwelling octopuses will snatch up crabs and lobsters, grabbing them with their arms and cracking their shells with their strong beaks. The octopus will also eat fish – including small sharks – sea snakes, squid and molluscs. It will usually inject its prey with a small amount of paralysing venom before chopping it up with its beak. It will sometimes use its beak to drill a hole in the shell of its prey in order to inject its venom. Year 4 Unit 26 © Rising Stars UK Ltd 2018
7
The Octopus by Kate Ruttle
What eats them? Most large fish, including eels, dolphins and shark, will prey on an octopus. The giant octopus is the favourite food of the sperm whale. A bigger octopus will also eat a smaller one. Octopus is eaten in many countries around the world by humans. Year 4 Unit 26 © Rising Stars UK Ltd 2018
8
The Octopus by Kate Ruttle
How do they protect themselves? The octopus has a number of different ways of protecting itself, including the ability of its skin to change colour as camouflage against rocks or a sandy ocean floor. Because it is almost entirely soft bodied, it can also squeeze itself into small caves and crevices between rocks. It can use its jet propulsion to escape and, at the same time, spray out a cloud of dark, inky fluid. The ink blurs the predator’s vision as well as interfering with its sense of smell so the octopus has a chance to escape. An octopus spraying ink to protect itself Vittorio Bruno/Shutterstock. © Rising Stars UK Ltd 2018 Year 4 Unit 26
9
Sort the words Which words link to how the octopus protects itself?
Which words link to how the octopus moves? Which words link to how the octopus solves its problems? Which words link to how the octopus catches its prey? Year 4 Unit 26 © Rising Stars UK Ltd 2018
10
Drag the focus words into the right boxes.
intelligence camouflage expel paralysing crevices entirely cavity blurs vision propulsion interfere protects moves solves catches prey Year 4 Unit 26 © Rising Stars UK Ltd 2018
11
ex- pro- Word detectives! out or upwards forward motion exit exclaim
expel = to shoot out or up propel = to shoot forwards Look up the meaning of the words below. How do the prefixes link to their meanings? exit exclaim exclude exhale proceed process procession procession Year 4 Unit 26 © Rising Stars UK Ltd 2018
Similar presentations
