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WorksheetsS2M2 - Science 9
Total questions: 45
Worksheet time: 43mins
Abbas investigates the reaction of zinc with hydrochloric acid. He pours 25 cubic centimeters of the acid into a conical flask. He adds small pieces of zinc. He collects the gas in a syringe.
What gas is produced and trapped in the syringe?
oxygen
carbon dioxide
hydrogen
nitrogen
Nico made an experiment where he added metal to an acid. He recorded the amount of gas produced.
He plots a graph of his results.
Between which times is the reaction fastest?
between 0 and 1 minute
between 2 and 3 minutes
between 3 and 4 minutes
there is no enough evidence
Vika wanted to find out how the rate of reaction changes if he increases the concentration of acid that would react to metal.
Which two variables he should keep the same in his investigation?
the amount of light and time of chemical reaction between an acid and metal
the temperature of the acid and the surface area of the metal
the amount of catalyst and the amount of an acid
the temperature of catalyst and the amount of light exposed to the reaction.
Arifa investigates the reaction of sodium thiosulfate solution with hydrochloric acid.
One of the products of the reaction is sulfur. This forms as a solid.
As sulfur is made, it hides the cross under the conical flask. Arifa measures the times taken for the cross to disappear.
Arifa wants to find out how changing the temperature affects the rate of the reaction.
Name the variable Arifa measures.
temperature
time of reaction
concentration of the acid
amount of substanace
Arifa made an investigation on the reaction of sodium thiosulfate solution with hydrochloric acid.
Arifa recorded the results in the table below.
Find the missing average.
200
201
202
203
Amanda investigates the reaction of hydrochloric acid with calcium carbonate.
The equation for the reaction is:
hydrochloric acid + calcium carbonate --> calcium chloride + carbon dioxide + water
Predict which product of the reaction is formed as a gas
Oxygen
Nitrogen
Carbon Dioxide
Water Vapor
Amanda set up the apparatus below to test whether or not the gas will produce when an acid reacts with a carbonate compound.
Amanda predicts that, as the reaction progresses, the mass of the reaction mixture in the flask will decrease.
Which of the reasons below best explains why the mass decreases?
the product that is formed as a gas dissolved in the reaction mixture
the product that is formed as a gas escapes into the air
the product that is formed as a gas is made up of atoms of two elements.
the product that is formed as a gas in an invisible gas.
Amanda records the mass of the reactant mixture (metal and acid) every minute. She plots a graph of his results.
Predict which of the graphs below best represents Rashid's results.
A
B
C
Amanda wants to investigate how the size of the pieces of calcium carbonate affects the reaction rate.
She has three sizes of calcium carbonate pieces - big lumps, small lumps, and powder.
She decides to measure the time taken for 1.0 g of gas to be made with each size of calcium carbonate piece.
Name the variable she changes.
type of acid used
amount of metal used
surface area of calcium carbonate
time of the reaction
Amanda finds that the powder reacts most quickly.
Which of the reasons below best explains why?
for a certain mass of calcium carbonate, the powder has the smallest surface area
for a certain mass of calcium carbonate, the powder has the biggest surface area
for a certain mass of calcium carbonate, the powder has the highest concentration
all of the above
The equation below shows the products when hydrogen peroxide decomposes:
hydrogen peroxide --> water + oxygen
Manganese (IV) Oxide catalyses the reaction.
What is a catalyst?
it is a substance that inhibits the rate of reaction by being consumed in the process
is a substance that increases the speed of chemical reaction without being consumed in the process
is a substance that initiates the chemical reaction that sustains the process for a period of time
is a substance that stops the chemical reaction without itself being consumed in the process.
The international unit of force is
Newton
Meter Square
Torr
Kilogram
The international unit of Pressure is
Newton
Meter Square
Torr
Kilogram
A student wants to find the density of a brick. He measures the sides of the brick as shown in the diagram below.
He measures the mass of the brick and find that it is 240 g. What is the density of the brick?
0.1
0.2
0.3
0.4
A mechanic is using a hydraulic jack to lift a car.
Here is a simple diagram of the hydraulic jack.
The weight of the car is 5000 N. The area of the piston that lifts the car is 0.25 meter square
What pressure is needed in the liquid to lift the car?
2,000
20,000
200,000
2,000,000
Anyam blows up a balloon and seals it.
If Anyam leave the balloons in the sunshine so that the gas inside gets hotter, what do you think will happen?
The gas particles inside the balloon will decrease its kinetic energy resulting to the decrease in the balloon's size
The gas particles inside the balloon will increase its kinetic energy resulting to the decrease in the balloon's size
The gas particles inside the balloon will increase its kinetic energy resulting to the increase in the balloon's size
The gas particles inside the balloon will decrease its kinetic energy resulting to the increase in the balloon's size
The table below shows the densities of different materials.
Decide whether the statement below is true or false.
10 cubic centimeters of iron has a smaller mass than 10 cubic centimeters of wood.
True
False
A fish can move higher and lower in the water. It has a sac inside it called a swim bladder. If the fish fills the sac with air from its gills, it will float up tot he surface. Explain why.
because the gills has specialised cells that controls the density of the fish
because the air inside the swim bladder makes the fish less dense than the water
the fish may float and sink whenever it wants because it is designed to swim in the ocean
The volume of the fish decrease when air gets inside the swim bladder making it more dense than water.
Which of these statements about the way that scientists work today is NOT correct?
Scientists share their ideas and scientific evidence in publications that others read.
Scientist use creative ideas to interpret the evidence that they collect in experiments.
It is unusual for scientists to read about the work of other scientists.
It is possible to make measurements that are more precise and accurate using new technology.
You are planning an investigation. Which of these things do you NOT do?
decide on a question to investigate
take precise and accurate results
decide which results to record
work out how to work safely
Jamal sits at the end of the see-saw. Jamal has a weight of 200 N.
Jamal's brother has a mass of 400 N. he tries to balance the see-saw.
Where should he sit on the see-saw to make it balance?
at the opposite end to the seesaw
At the pivot of the seesaw
between the pivot and the end of the seesaw
At the end where his brother sits
Jamal sits at the end of the see-saw. Jamal has a weight of 200 N.
Jamal's brother has a mass of 400 N. he tries to balance the see-saw.
Where should he sit on the see-saw to make it balance?
at the opposite end to the seesaw
At the pivot of the seesaw
between the pivot and the end of the seesaw
At the end where his brother sits
It pertains the two plates with an insulator between them, that can be charged
Dielectric
Pixels
Capacitor
CCD
In this type of circuit all the components can be turned on or off independently
Battery
Series Circuit
Switch
Parallel Circuit
The circuit below contains two special switches. The switch on the left can be flipped between connections 1 and 3. The switch on the right can be flipped between connections 2 and 4.
This circuit can be used to control the lights at the top and bottom of a staircase.
What happens to the light bulbs when the right switch is flipped to 2.
the bulb will turn off
the bulb will turn on
the bulb will glow brighter
the bulb will glow dimmer
A student used four identical bulbs and a battery to make a circuit. He puts a box over the circuit so the connections cannot be seen.
Another student unscrews each bulb in turn and watches the effect on the other three bulbs.
Which bulb or bulbs will be the brightest?
A
B
C
D
Here is a circuit diagram. All the lamps are the same.
Which ammeter will show the lowest reading?
A1
A2
A3
all ammeters will have the same reading
Using the diagram below, what would happen to the other lamps if lamp X is broke?
the other lamps will turn off
the other lamps will continue to generate light
the other lamps will flicker
the other lamp becomes dimmer
A circuit contains a 6 V cell and two lamps connected in series.
If both lamps are identical what will be the reading on each voltmeter?
6 V
3 V
6 A
3 A
A student is planning how to collect some data to answer this question:
Which circuit component has the biggest resistance?
He writes down his ideas, but they are not in the right order. List the letters in order to put the statements in the right order.
D -> A -> C -> B -> E
A -> C -> D -> B -> E
C -> A -> D -> B -> E
B -> C -> D -> A -> E
A student wire up a circuit to measure the current through a buzzer and a lamp. He connects a voltmeter to measure the voltage across the buzzer. He draws his circuit diagram.
How many things are wrong with his circuit?
1
2
3
4
A bath will have ________ thermal energy than a cup of warm water at the same temperature.
equal amount of
less
more
unstable amount of
The amount of energy that you need to raise the temperature of something does not depend only on the temperature change.
List the letters in order from the smallest to the largest amount of energy required. The energy needed to raise the temperature of:
A. 1 kg of water by 20 degrees Celsius
B. 2 kg of water by 20 degrees Celsius
C. 1 kg of water by 10 degrees Celsius
A -> C -> B
B -> A -> C
C -> B -> C
C -> A -> B
A student puts two thermometers on the desk underneath a lamp. She covers the bulb of one thermometer with black paper (labelled A) and the other with aluminium foil (labelled B)
Which thermometer will read the higher temperature after half an hour?
A, covered with black paper
B, covered with aluminum foil
both will have the same reading
there is no change of temperature readings on both thermometer
There is a hot drink on the table. The temperature of the hot drink could dropped significantly through heat transfer.
Explain how conduction changes the temperature of the tea.
conduction allows heat to transfer from the drink to the surrounding air
conduction allows heat to transfer away from the drink to the vacuum
conduction allows the heat to transfer from the drink to the cup, saucer and table.
conduction allows the heat to transfer within the drink itself
If you hold a magnet near a coil of wire a voltage will be induced.
True
False
Here is a diagram of a fossil-fuel power station.
Which letter is the generator?
A
B
C
D
Here are some secondary data about solar cells from a company that sells solar cells. The table shows the are of the panels, the power produced, the energy produced per year, and the mass of carbon dioxide that would be saved because you are not burning fossil fuel.
How much carbon dioxide would you save per year if you used 25 square meter of solar panels on your roof?
3,750
175
3,725
300
A car is at the garage waiting to be repaired. The weight of the car is 20,000 N and the area of each tyre in contact with the ground is 250 cubic centimeter.
Calculate the pressure that the car exerts on the ground.
20,000 Pa
200,000 Pa
2,000,000 Pa
800,000 Pa
Here is a diagram of a hydraulic pump. The mechanic needs to lift the car up. He can put a car on the ram and use the handle to lift the car.
The mechanic pushes the handle down and the oil pushes the large piston up. The valves let more oil in so that he can pump the handle again.
What would happen if the pump used air instead of oil.
the force produced is more than the amount produced using oil.
the force produced is equal than the amount produced using oil.
the force produced is less than the amount produced using oil.
the force produced is neither more nor less than the amount produced using oil.
A girl is pumping with some oil and water. She pours the oil and water into a glass and the oil floats on the water.
She cuts a cube of banana and puts it in the glass. It floats between the layer of oil and water.
What can you say about the density of the banana compared with the density of the oil and the density of the water?
The banana is less than the oil but denser than the water.
The banana is denser than the oil but less dense than the water.
The banana has equal density with oil and water.
The banana is denser than oil and water.
A teacher is showing the class how you can make a balloon stick to the wall by rubbing it on your clothes.
As she rubs the balloon on her clothes the balloon becomes positively charged.
What has happened to make the balloon charged?
The electrons has moved from the clothes to the balloons
The protons has moved from the clothes to the balloons
The protons has moved from the balloon to the clothes.
The electrons has moved from the balloon to the clothes.
A student has connected a parallel circuit.
The reading on ammeter A1 is 0.5 A, and the reading on ammeter A2 is 0.1 A. What is the reading on ammeter A3?
0.4 V
0.6 V
0.6 A
0.4 A
During the day in the desert it can get very hot. Some people run marathons in the desert. There is an 'ultra-marathon' that takes place in the Sahara desert.
How does energy from the Sun reach a runner in the desert?
Conduction
Radiation
Convection
Insulation
A farmer wants to use solar power to reduce the cost of his electricity. He buys a solar cell and puts it on his roof.
What kind of energy source is solar energy?
Renewable
Non-Renewable
Elastic Energy
Chemical Energy
