Passive Voice

This is one of the most important aspects in the exams......I know preliminary exams and PSLE are difficult...
Fighting! 加油!
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Use passive sentences when you want to emphasise the effect of an action and when it is not important to mention the doer of an action, or if you do not know who the doer is.

Example: Children who are brought up in the equatorial country of Colombia have a different lifestyle from children in Sweden.

When you want to say who the doer of the action is in a passive sentence, use "by + person".

Tense of passive sentence:

has/have been + past participle

Science: Adaptations for escaping from predators

1. Living in groups
2. Moving quickly from predators
3. Hiding
4. Defending themselves
5. Appearing bigger and fiercer when threatened(camouflage)
6. Warning colours or patterns(used to warn predators about bad-tasting or poisonous prey)
7. Taking the appearance of others(camouflage)

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Living in groups(eg): elephants.

Purpose: It enhances survival of the plant-eaters, and they help one another to look out for predators

Moving quickly from predators(eg): Antelope

Purpose: It allows them to move quickly from predators

(Extra: A squid can force out a jet of water to help it swim away quickly)

Hiding(eg): Tortoises

Purpose: To hide from predators because they cannot move quickly enough

Defending themselves(eg): Porcupine

Purpose: To defend themselves. They have structural adaptations like quills, horns and armour-like shells.

Appearing bigger and fiercer when threatened: Puffer fish

Purpose: To scare predators. They can make themselves look bigger and more dangerous when threatened by swelling up using water or air.

(Extra: Some puffer fish are spiny and dangerous)
..........

Science: Adaptations for obtaining food

Sharp senses: Keen sense of smell, sight, hearing, touch, "taste"

Using sharp teeth and claws

Using speed

Using poisons

Using comouflage


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Feeding


Plant-eaters: Cutting and grinding teeth.

Animal-eaters: Sharp teeth for tearing meat

Birds: Sharp, hooked beaks for tearing meat/Long slender beak

Science: Effects of a force

I know I'm in hiatus for a long time, because I do not want to continue posting.

But PSLE is coming, and I have to do it. ARGH. I hate this. Worse year ever.

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Effects of a force

1. Make a stationary object move
2. Change the direction of a moving object
3. Speed up, slow down, or stop a moving object
4. Change the shape of an object