1
State 2 importance of biodiversity.
Any 2 from: sources of food / balance in nature / recreational park / medical / raw materials for industries / education
DOUBLE THE TROUBLE
Define vertebrates. Give 2 examples.
Definition: Animals that has back bone.
Examples : fish / frog
Steal the Spotlight (50pts from a random group of choice)
Define invertebrates. Give 2 examples of vertebrates without legs and without segmented body.
Invertebrates are animals without backbone.
Examples: sponge, sea anemone, corals, planaria, snail
Which of the following is a producer?
A. Cow
B. Mushroom
C. Grass
D. Eagle
C
An organism that eats only plants is called a ________.
herbivore
What is the unit of temperature in the SI system? Why is SI system important?
Kelvin (spelling must be correct)
SI unit is important as a internationally recognised unit used to avoid confusion
Do you agree with this statement? Explain.
No. Bats are mammals because they give birth and nurse their youngs.
If pesticides are used on crops, explain how it can affect a food chain that includes grasshoppers, frogs, and snakes.
Pesticides can poison grasshoppers (primary consumers), reducing their population. This affects frogs (secondary consumers) and snakes (tertiary consumers) by reducing their food source, possibly leading to population decline.
Mystery Multiplier
What is the difference between heat and temperature?
Heat is the total energy of molecular motion in a substance, while temperature is the measure of hotness and coldness of a substance.
Which of the following organisms is a decomposer?
A. Ant
B. Mushroom
C. Frog
D. Snake
B
Who classifies all living organisms into 5 kingdoms?
Robert H. Whittaker
Why are metal cooking pots often coated with black on the outside?
black surfaces absorb heat better, helping cook food faster.
RISK IT ALL
Name two derived quantity that is found by dividing two or more base quantities.
Density or Speed or Pressure
Why are wool blankets used in winter to keep us warm?
Wool traps air, which is a poor conductor of heat, reducing heat loss from our body.
ANSWER OR FREEZE
What is a derived quantity?
A derived quantity is a physical quantity that is obtained by multiplying or dividing two or more base quantities.
State one difference between organisms of Kingdom Monera and Protista.
Organisms of Kingdom Monera are prokaryote (don't have nucleus and membrane bound organelles), while kingdom protista are eukaryote (have nucleus and membrane-bound organelles)
You are designing a new zoo exhibit that shows mutualism. Which two animals or organisms would you put together, and why?
An example could be an oxpecker bird and a zebra—the bird eats ticks off the zebra, and both benefit.
Why do sea breezes occur during the day?
The land heats up faster than the sea. Warm air over land rises and cooler air from the sea moves in to replace it—this is convection.
How does radiation differ from conduction and convection in the transfer of heat?
Radiation transfers heat through electromagnetic waves and does not require a medium, whereas conduction and convection need particles or a medium to transfer heat.
I live inside your body, unseen,
I help you digest, keeping you lean.
You don’t pay me, but I still stay,
What’s our relationship, day by day?
Mutualism (Example: Gut bacteria)
Why are cooking pots usually made of metal but have plastic or wooden handles?
Metals are good conductors of heat, so they heat up quickly and cook food efficiently. Plastic and wood are poor conductors (insulators), so they are used for handles to prevent users from burning their hands.
Describe how hot air balloon works. You must use key words involved in the heat transfer process.
A hot air balloon rises because of heat. A burner heats the air inside the balloon. When air is heated, it becomes lighter (less dense) and rises. This is called convection. Since the hot air inside the balloon is lighter than the cool air outside, the balloon goes up. When the air cools down, it becomes heavier, and the balloon comes down.
EXTRA 50%
A person wears a white shirt in hot weather and a black shirt in cold weather. Explain why.
A white shirt reflects most of the sun’s radiation, keeping the person cooler. A black shirt absorbs more heat from the sun, helping the person stay warmer in cold weather.
You are an architect designing a school in a very hot country. One of your goals is to keep the building cool without using too much air-conditioning. Based on what you know about heat transfer, how would you design the roof and walls of the building? Explain your choice using the concept of radiation.
I would paint the roof and walls white or light-colored because light colors reflect more heat from the Sun. This reduces the amount of heat absorbed by the building through radiation, keeping the inside cooler.
DOUBLE THE TROUBLE!
Thermos flasks are designed to keep drinks hot or cold by reducing heat transfer. Imagine you are asked to improve the thermos flask for use in extremely hot climates where keeping drinks cold for longer is very important. Using your knowledge of conduction, convection, and radiation, suggest at least two modifications you would make to the thermos flask design. Explain how each change helps reduce heat transfer.
Add a reflective silver coating on the outside:
To reflect sunlight and reduce heat gained by radiation.
Include an extra layer of insulation with trapped air or foam:
To reduce conduction and convection from the outer environment.
Optional higher-level responses could mention:
Using vacuum insulation to eliminate conduction and convection.
Designing the flask with white or shiny exterior colors to reflect more heat.