How To Soar in PSLE - BTPS Way!!
Interact with complex questions / graphs / pictures to pick up valuable clues (don't highlight - just use your pen to underline words or scribble notes)
Start with Booklet A and do it meticulously with full focus - explore all 4 distractors before making final choice.
MANAGE your TIME - to score well, you need to try to finish ALL questions.
Specific answers = answers that are relevant to question.
When confused, choose any of the following strategies:
1. Ask, "What Science idea is being used in question?"
2. Pose other questions to clarify your thoughts
3. COMPARE to another set-up
4. COMPARE to a reverse situation
5. Connect to your knowledge in life (yes, you do have lots of prior / other knowledge)
6. Break down your answer in steps before crafting final answer.
Common problems with wrong answers:
*Answers are generic/vague and do not connect to that specific question
*Answers are not scientific and do not explain using Science ideas
*Answers do not make use of data provided when asked
*Answers did not make comparisons - use words like more/most etc..when asked
BTPS supports all P6 in achieving their PSLE GOALS!!
Carnivorous Plants
The following plants are found in the wilderness in marshes and bogs.
Such plants feed on insects.
Compare these carnivorous plants to the ususal food producers.
What could be the cause of their physical and behavioural adaptation?
What are the consequences of their adaptation?
Science Around Me (SAM)
SAM is a Science journal that allows pupils to express themselves in their favourite ways about Science.
SAM is another great opportunity for pupils to THINK and TALK Science in a medium that is customised to their learning styles.
SAM allows teachers to informally assess understanding of the child and clarify misconceptions in their learning.
When Ice Changes into Water by Goh Chee Yan - 5G
Do you wonder whether the mass of ice changes when it melts into water. Try this out:
1. Put a few ice cubes into a plastic bag
2. Tie the mouth of the bag tightly
3. Weigh the bag of ice cubes (if there is condensation outside the bag, wipe it dry before weighing)
4. Place the bag in the sun
5. When ice has melted, wipe the outside of the bag dry (refer to step 3)
6. Weigh the bag
You will discover that the mass of the bag remains the same!
There is no change in mass when ice melts!!
10 comments:
The carnivorous plants have the adaptations to enable them to catch insects to have more nutrients than usual. With the adaptations, they can lure insects oblivious to their surroundings and trap them.
Ong Yan Quan 6F
As carnivorous plants live in nutrient poor wetlands, the plant has to depend on other sources to obtain nutrients for its survival. Examples of carnivorous plants include: venus fly trap(whose leaves trap the insect), pitcher plants(who has water in its "pitchers" to attract insects and many others...
There are 2 different types of adaptations: active and passive. Active uses rapid movement while passive uses sticky hairs that trap prey. With these adaptations,they are able to successfully trap pray for their survival.
~Nicholas King(6C)
Carnivorous plants have 'alien' adaptations. All organisms need food to survive, and the carnivorous plants do not eat the usual plant food. Instead they feast on juicy little bugs. [poor bugs] Strangly, the carnivorous plants DO NOT need to eat bugs constantly, they just stop growing if they do not eat bugs. Maybe this adaptation of eating bugs ensures its survival.[bugs eat plants] Or the bugs can be an additional source of nutrients.But this adaptation does help if there is a massive volcanic eruption, and the ashes block of the sun[like mt pinatubo]. The standard plants who need sunlight for food might die out, with only the carnivorous plants surviving.The carnivorous plants also might keep the insect population under control.[yay, no bugs] Timothy 6Grace
The carnivorous plants such as Venus fly trap and pitcher plant Sundrew usually grow shorter and thus they have to find other ways to get nutrients and survive. The do so by attracting insects and when an insect land on them , it will trigger off an automatic alarm in the carnivorous plant and then it will drown the insect befor eating it. ( If these carnivorous plants ar kept at home, they should be given the right amount of of food or else they will soon die.)
s.L.Keerthanna 6CVharity
the carnivorous plants have less nuitrents in their enviroment and need more nuitrents by catching the insects and digesting them but if insects learn to avoid these plants the carnivorous plants will go extinct
Calvin Ho of 6 grace
I think that the carnivorous plants could be short and they cannot receive so much sunlight so, they have to receive nutrients by 'eating' the insects that flies by or lands on them.
They are different from the usual food producers. I think that it is because the food producers are like 'prey' and the carnivorous plants are like 'predators'. Food producers, like their name, produces 'food' for herbivores and are eaten while the carnivorous plants make food for themselves and 'eat' insects for nutrients. I think that the carnivorous plants can still make food as after all, they still have leaves...
Consequences??
Well, if human beings do not pour away stagnant water, and mosquitos or insects breed, the population of insects will increase. If most of these insects were to land on Venus Fly Traps or any other carnivorous plants, the population of carnivorous plants will also increase and soon, the population of insects will decrease rapidly and the food producers near them will not have enough nutrients because the carnivorous plants will not have anything to eat and have to get nutrients from the soil and then, all the plants that grows in the same field as the carnivorous plants will not grow well...
Yilin 6Grace
The Carnivorous plants grows in nutrient poor soil. The plants feed mainly on insects and other small animals. Inside these kind of plants, there is usually some sweet smelling digestive juices that attracts the insects. when the insect is about to enter the entrance of the pitcher that stores the juices, the "mouth" of the plant will snap and the insects juices will be sucked in, then spitting out the body.
These kind of adaptation may wipe out the insects and when the body is spat out, the body decomposes, leaving a bad stench and might make the soil not suitable for growth. By using this adaptation, the carnivorous plants will gain more nutrients than the food producers and these kind of plants can "eat food" even without sunlight.
-Benjamin Wong (37)
-6 Grace
The plant grows in areas where there is not enough nutrients in the soil.They lure and eat the insectsd to get the nutrients they need.
The plants would either use sticky hairs or quick movement to catch their prey once it lands on the leaves of the plant.
Chew Kai Wen(6C)
Well... first, they usually grow in areas that are poor in nutrients (e.g. swamps). Hence, their roots absorb less nutrients than it needs.
So, to get sufficent nutrients, they turn to trapping and eating insects instead. Of course, they do have the odd rats/birds/frogs being eaten, but caterpillars are more common, but even the event of trapping a caterpillar is rare, so the odd rats/birds/frogs may just have offended the gods, to meet a sticky end.((=
Continuing on, to attract their prey, they usually provide some form of attraction, e.g. some pitcher plants grow in such a way that a large leaf covers its opening, and when it rains, an insect seeking for cover will see the pitcher plant, crawl into it... and hello, it's lunchtime for the plant. Other plants (most notably sundew plants) form such that nectar is stuck on the tips of its stalk-like thingys, and look very appealing... both as food and for admiration itself. Though the insect focuses only on the former, so when it lands on the stalk things, they get trapped (it's very sticky, the nectar I mean), and again, it's byebye to the insect.
Of course, once the insect is digested, the skeletal remains cannot be swallowed, so, in some plants like Venus flytrap (it is, right? I keep getting confused over the plant name...), once the insect is digested, the leaves reopen and the remains are blown away the next time the wind comes along. Though I'm not too sure, but it seems like for the Venus flytrap, there's a limited number of uses for a leaf; once it's reached, the leaf drops.
But anyway, the consequences...
Well, they act relatively like froggs and lizards and whatever organisms that are insectivores (diet consists of only insects) in the sense that the plants control the number of insects. I'd like to think that we should plant these plants around us, but that's dangerous, 'cause if you and I trip and we go crashing into one of these carnivores... well, let's just say that the outcome might be quite nasty.
But this is assuming if we actually DO plant them, because the plants don't really thrive under strong sunlight. Of course, given enough time, they can adapt, but I'm thinking of more than just a few years, the adaptations might take a few generations (heck, scratch that, a few CENTURIES) to get adapted to its surroundings. And besides, there's a lot of other things to consider, like would anyone actually agree to it, would the proposal be laughed out of court... blahblah and so on and so forth.
But I'm rambling on about nonsense.
Anyway, the point is, I think we should just leave them. They do do a pretty good job of controling the population of insects, so I'd say leave them alone.
Although these carnivorous plants do photosynthesis and respire like any other plant, it has a 'special ability', It can trap flies.
These plants(e.g. Venus flytrap, pitcher plant, Bladderworts, cobra lily, etc) grow in the wilderness, in marshes and bogs. The soil in these places might not be as rich in nutrients as soil types in other places. That is why this plants are carnivorous.
In order for it to replenish this minerals, normal plants get from the soil, these carnivorous plants catch flies in order to get the minerals they need.
p.s. nitrogen is what most plants 'look' for. The carnivorous plants too need nitrogen from the soil, but due to the place which it survives in, the soil lacks of nitrogen, hence it gets its nitrogen from insects.(and of course other minerals)
The cause of their physical and behavioural adaptation is because the soil lacks of nitrogen.(the mineral plants absorb from the soil.)
The disadvantage of the adaptation of the carnivorous plant, is that it takes a longer time for carnivorous plant to get food it needs via the insects as compared to just photosynthesising.
Kay Kiat (6charity)
(need not need to see just extra info.)
according to some research, they found out that to 'make' a insect trap it uses less time and food(plant food) as compare to 'make' a leaf.
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