Fizz, Bubble, React!
Name two acids
Hydrochloric acid/nitric acid/sulphuric acid
State one importance of photosynthesis
Food chain
Why does a compass needle move?
It aligns with Earth’s field.
What is the hottest planet in our solar system?
Venus
nogrydhe
Hydrogen
State the colour of litmus paper in acids and bases.
Acid- Red
Base- Blue
Plants make glucose in photosynthesis. Why is the starch test done to identify whether plants have photosynthesized?
Glucose produced in photosynthesis is quickly used or converted in the plant for energy or growth.
Plants store excess glucose as starch, which is more stable.
Testing for starch is therefore an indirect way to show that photosynthesis has occurred.
If you are in Dubai facing North, which direction is on your right?
EAST
Which animal can survive being frozen solid and then come back to life when thawed?
Tardigrade (water bear)
ucsolge
Glucose
Give three features of bases
They have a bitter taste
They are slippery in touch
They turn Red litmus blue
They liberate OH– ion (hydroxyl ion) when dissolved in water
They conduct electricity in solution form
Give three adaptations of plants for photosynthesis
CUTICLE, EPIDERMIS, PALISADE, GUARD CELLS, STOMATA, VEINS
Give two applications of electromagnets
Generators, motors, and transformers
Electric buzzers and bells
Headphones and loudspeakers
Relays and valves
Data storage devices like VCRs, tape recorders, hard discs, etc.
Induction cooker
Magnetic locks
MRI machines
Particle accelerators
Mass spectrometers
What is the name of the natural phenomenon that causes the sky to appear blue during the day?
Scattering
tatoasm
Stomata
Give two uses of neutralisation reactions
Antacid tablets contain bases (like magnesium hydroxide) that neutralise excess stomach acid.
Lime (a base) is added to acidic soil to neutralise it and make it suitable for farming.
Draw the structure of a leaf with all labels.
Margin, tip, petiole, lamina and vein
Give three ways to make an electromagnet stronger
Wrapping the coil around a piece of iron (such as an iron nail)
Making the wire into a coil
Adding more turns to the coil.
Increasing the current flowing through the wire or coils
What is the name of the largest internal organ in the human body?
Liver
lphrolyhloc
Chlorophyll
Write the chemical equation for the reaction of sulphuric acid and potassium hydroxide.
H2SO4 + KOH --> K2SO4 + H20
Write the balanced chemical equation for photosynthesis.
6CO2 + 6H20 -->C6H12O6 + 6CO2
Describe how electricity can produce magnetism
When an electric current flows through a wire, it creates a magnetic field around the wire.
The magnetic field lines form concentric circles around the wire.
Wrapping the wire into a coil (solenoid) strengthens the magnetic field, and placing a soft iron core inside the coil makes a strong electromagnet.
What is the name of the hypothetical particle that travels faster than light, according to some theories in physics?
Tachyon
cfelidmagnetin
Magnetic Field