NEW
Font size
WorksheetsPreparation
Total questions: 75
Worksheet time: 6hrs 15mins
Litmus and other simple indicators just show if a substance is an acid / alkali. Universaal indicator shows how acidic / alkaline a substance is. The acidity / alkalinity of a substance is one of its chemical properties. Universal indicator can change to many different colours. Universal indicator is made up of a mixture of different indicators. Universal indicator changes colour and shows the pH of a substance. Which is true about measuring the liquid of cola drink when you use universal indicator?
The colour becomes red, the pH is around 4, and the type of liquid is weakly acid
The colour becomes blue, the pH is around 10, and the type of liquid is weakly alkaline
The colour becomes Yellow, the pH is around 4, and the type of liquid is weakly acid
The colour becomes green, the pH is around 10, and the type of liquid is weakly alkaline
Biologists who study ecology know that microorganisms have an important role to play in the environment. What is the ecological role of some microorganisms as decomposers?
Microorganisms decompose organic material, returning nutrients to the ecosystem for new growth.
Microorganisms break down dead plants and animals, recycling nutrients into the soil.
Microorganisms break down waste products, which helps reduce pollution in the environment.
Microorganisms help plants grow by turning dead matter into food and energy for the soil.
There are 4 properties below:
1. Dull
2. Conduct elektricity
3. Brittle
4. Ductile
Which are the number that mention about non-metal propertties?
1, 2, and 3
1 and 3
2 and 4
All the numebers are correct
The table above shows the properties of copper, tin, and bronze. Bronze is an alloy that is made by mixing copper with tin. Mixing different amounts of copper and tin makes the different forms of bronze. Which is the differentiation property between copper and tin?
The properties that are ductile and malleable
Conduct electricity
The appearance
Element
Working safety with acids and alkalis is important for you. When you handle chemicals you should replace the bottle top as soon as you have finished using the bottle. Which is the reason of replacing the bottle top as soon as you have finished using it?
If you spill something it does not spill on to you
Nothing gets into your eyes
It does not get acid onto the surface or dirt into the acid
It prevents spills and reduces the risk of replacing the wrong top on the wrong bottle
Toothpaste is a dental care product used by almost everyone. Toothpaste has the chemical properties, which is alkaline. Which the statement is true about alkalinity of toothpaste?
Toothpaste helps neutralise from bacteria that produce acid
Toothpaste helps to neutralise from bacteria that produce basic
Toothpaste neutralise the acid in digestive system
Toothpaste does not have ability to neutralise anything
Microorganisms, like bacteria and fungi, break down dead plants and animals into simpler substances. This process is called decay, and it helps recycle nutrients back into the environment.
Which of the following is a result of decay caused by microorganisms?
They help plants grow by breaking down organic matter and releasing oxygen.
They help plants grow by breaking down dead matter into nutrients.
They cause diseases in plants and animals, affecting the ecosystem.
They use sunlight to produce energy for other organisms in the food chain.
How many consumers are there in the food web?
3
7
5
6
The Moon can be seen at different times depending on its position in the sky. During a lunar eclipse, the Earth blocks sunlight from reaching the Moon.
Is it true that a total lunar eclipse can only ever be seen in the daytime?
True, because the Sun shines directly on the Moon during the day.
True, because the Earth's shadow can only appear during the day.
False, because a lunar eclipse happens when the Moon is in the night sky.
False, because a lunar eclipse always occurs during a solar eclipse.
Arun goes to the same music concert in two different theatres, A and B. The theatres are shown in the pictures.
Arun says the music sounded better in theatre B. Which answer best explains why the music sounded better in theatre B?
Theatre B has walls that block outside noise, so it is quieter inside.
Theatre B has more seats, so the sound spreads more evenly in the room.
Theatre B has materials that absorb sound, making the music clearer.
Theatre B has a bigger stage, so the musicians can perform better.
Which is the function of Copper?
Copper is used for electrical wiring
Copper is used for cooking pans
Copper is used for cymbals make a ringing sound
Copper is used for jewellery
Which is the metal mixtures?
Alloy
Bronze
Steel
Coins
Which is the example of separating mixtures using evaporating dish?
Sand and water
Seawater and water
Water and copper sulfate
Food dye and water
Which powder do you think is the most effective?
Powder A
Powder B
Powder C
No one the above
Magnesium reacts with hydrochloric acid. which are the products of the reaction above?
Hydrochoric magnesium and hydrogen
Magnesium chloride and hydrogen
Magneside chloride and hydrochloric
Magnesium chloride and hydroacid
When an apple is left out in a warm place, microorganisms like bacteria and fungi start to break it down. This process, called decay, causes the apple to soften, change color, and eventually rot. What happens to an apple during the process of decay?
Microorganisms break down the apple and cause it to rot.
The apple becomes soft and starts to release a sweet smell.
The apple turns into a hard, dried-up fruit over time.
The apple changes color and becomes more sour as it decays.
Microorganisms are tiny organisms that can only be seen under a microscope. They are found in many environments, such as in water, soil, and even inside the human body. Some microorganisms are helpful, while others can cause diseases.
Which of the following are examples of microorganisms?
Dog, fungus, and bacteria.
Yeast, bacteria, and protozoa.
Plant, virus, and algae.
Bird, bacteria, and tree.
The diagram below shows the alignment of the Sun, Moon, and Earth during an astronomical event. Which of the following best describes the event shown in the diagram?
Partial lunar eclipse
Annular solar eclipse
Total solar eclipse
Total lunar eclipse
The layer of the Earth that behaves like a solid, but flows over long periods of time due to high temperatures and pressures is called mantle. Which part represents the mantle?
A
B
C
D
Sofia is watching television. The sound from the television is travelling across the room, as shown in the diagram. Which of these arrows shows how the particles in air vibrate?
What does the word ductile mean?
The ability for a material to be processed in several ways
The ability for a material to be drawn out into a thin wire without losing its strength
The ability for a material to be recycled
The ability for an object to pass electricity and heat through it
I made a chair from wood because it is . . . .
Strong
Weak
Flexible
9-caratgold is used for..
building
jewellery
aircraft
steel
A silver-colored coin is a mixture of
copper and tin
copper and nickel
copper and carbon
copper and gold
When an object changes shape when struck by a hammer it is said to be...
luster
malleable
brittle
ductile
Above diagram is an aeroplane. What type of alloy is used to make this aeroplane?
Steel
Duralumin
Pewter
Brass
Shape memory alloy used in glass frames is the mixture of _____
titanium and aluminium
carbon and tin
copper and steel
nickel and titanium
Pure metals are
too hard
too dull
too brittle
too soft
Above figure is the Petronas twin tower building. What type of Alloy is use to build this building?
Steel
Brass
Duralumin
Pewter
An indicator....
Is made using vegetables
Tests acids by changing colour in a solution
Tests whether a substance is acidic or basic by changing colour
Is another term for 'neutralisation'
This is the pH scale of which indicator?
Methyl orange
Universal indicator
Litmus solution
Red cabbage indicator
Which is a alkaline
Lemonade
Salty water
Toothpaste
Water
Salt and water are produced when acid reacts with alkali. Salt produced is
acidic.
alkaline.
neutral.
The chemical reaction between an acid and alkali is called
respiration.
combustion.
neutralisation.
photosynthesis.
Which materials reflect sound well?
The diagram shows a research vessel using sonar to map the ocean floor.
Upon which basic behavior of sound waves does this technology depend?
absorption
compression
reflection
refraction
the layer on which living beings live is ...
crust
mantle
outer core
inner core
This happens when two plates collide, one section slides on top of the other, one beneath is pushed down. Magma is squeezed up between two plates.
volcanic eruption
tsunami
landslide
What type of event will occur at this boundary?
Earthquake
Volcano Eruption
Tornado
Mountain Building
Subduction means.....
one plate goes under another plate
two plates slide past each other
two plate collide and form folded mountains
An eclipse occurs when one object in space moves in the ___________ of another.
reflection
shadow
orbit
rotation
What is being shown in the diagram?
Solar Eclipse
Lunar Eclipse
Full Moon
Supernova
What is shown in the diagram?
Solar Eclipse
Lunar Eclipse
New Moon
Nebula
Bacteria is known as__________________ in an ecosystem when feeding on dead organisms.
Decomposers
Herbivore
Pathogens
Infections
Antara susunan yang berikut, yang manakah ialah rantai makanan yang betul?
The transfer of energy from one organism to the next in an ecosystem begins with a producer. A producer is an organism that produces its own food. A consumer is an organism in a food chain that obtains energy from producers or other consumers; consumers may be herbivores or carnivores.
Which food chain correctly describes the flow of energy in an ecosystem?
grass → grasshopper → fish → human
grasshopper → fish → human
human → fish → grasshopper
human → grasshopper → fish → grass
A substance that is formed as the result of a chemical reaction
Product
Reactant
Starters
Enders
Which of the following is an example of a physical change but not a chemical change?
A log gives off heat and light as it burns.
A tree stores energy from the Sun in its fruit
A penny lost in the grass slowly changes color.
A water pipe freezes and cracks on a cold night.
Which of the following is a characteristic of all chemical changes?
A different state of matter is produced.
Some mass is converted to energy.
Some form of light is given off.
A new material is formed.
Which of the following is an example of a physical reaction?
Burning of wood
Melting of ice
Rusting of iron
Baking a cake
You know that a chemical reaction has occurred if
there is a precipitate (new solid)
there is a color change.
there is a temperature change.
All of these answers are evidence.
Complete the word equations.
copper oxide + sulfuric acid →
(black)
copper sulfate + water
(precipitate)
copper sulfate + water
(blue)
copper sulfate + water
(white)
copper sulfate + water
(green)
Complete the word equations.
magnesium + hydrochloric acid →
magnesium chloride + hydrogen
magnesium chloride
magnesium chloride + water
magnesium chloride + carbon dioxide
