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WorksheetsPTS 14
Total questions: 60
Worksheet time: 3600secs
The bar chart below shows how the number of cigarettes smoked is linked to the percentage of deaths from heart disease in the total male population. Which statements correctly describe the data. Choose all that apply.
As the number of cigarettes increases, the risk of heart disease increases
As a person gets older, their risk of heart disease increases
Smoking has a greater effect on risk of heart disease in older people
Males are at higher risk of heart disease than women
The diagram below shows bones and muscles of the human arm. The biceps and triceps are muscles that contract to move the bones of the lower arm.
What do the biceps and triceps do to move the arm in the direction shown by the arrow?
The biceps and the triceps contract at the same time
The biceps contracts and the triceps relaxes
The biceps relaxes and the triceps contracts
The biceps and the triceps relax at the same time
Which is not a function of the skeletal system?
To support the body
To allow the body to move
To sense changes in the environment
To protect organs of the body
Howard Florey and Ernst Chain are credited with being the first to manufacture penicillin. To do this, they looked at the work of earlier scientists, including Alexander Fleming. What does this tell us about scientific discoveries?
Data from old experiments are not useful in making new discoveries
Scientific problems can only be solved by a group of people
Scientists can only make new discoveries if they work independently
Scientists can look at old observations in a new way to help make discoveries
Joanne measured the volume of air she breathed in and out of her lungs. The graphs represent the volume of air Joanne breathed in and out with each breath before and during exercise.
Why did Joanne breathe in more air during exercise?
Cells require more water to regulate temperature
Cells require more nutrients over time
Cells need more oxygen during exercise
Cells need more protein to build muscle during exercise
Which statement about bacteria is not true
Bacteria can cause food to spoil
Bacteria in the gut help to break down food
Bacteria are used in the production of yoghurt
All bacteria are harmful
An organ system is...
a collection of organs working together to do an important job
a collection of tissues that do the same job
a collection of organs that help us breathe
a way of counting the number of organs in the body
Lactic acid is produced in your muscles and builds up during intense exercise. It can lead to painful, sore muscles. How is lactic acid removed?
Lactic acid is converted into a neutral substance in the muscles
Lactic acid is broken down in the liver and muscles in the presence of oxygen
Lactic acid is transported to the intestines and digested
Lactic acid is released through the skin in the form of sweat
Moaza measures the mass of her laptop. Which unit should she use
metres
pounds
milligrams
kilograms
Use the periodic table to help you decide which statement is correct
Hydrogen (H) has more protons than iron (Fe)
Lithium (Li) has more protons than helium (He)
Argon (Ar) has more protons than calcium (Ca)
Oxygen (O) has more protons than argon (Ar)
Which group contains the most reactive metals
Group 1
Group 2
Group 7
Group 8 or 0
Fossil fuels are formed from...
Water
Electricity
Dead plants and animals
Rocks
Which of the following particle diagrams shows molecules of a compound?
The diagram shows the carbon cycle. In process A, carbon dioxide in the atmosphere is taken into plants. What is process A?
Evaporation
Fossilisation
Respiration
Photosynthesis
Which of the following best describes the crust of the earth?
It is a very dense solid made from iron and nickel.
It is about 2,000 km thick and is a liquid.
It is a layer of semi-molten rock
It is the rocky outer layer. It is thin compared to the other sections.
When a crane lifts a load, it doesn't fall over. This is because of...
Friction
Air resistance
Magnetism
Balanced forces
The diagrams show four measuring containers. Which is the best container to use to measure 15 cm3 of water?
Yasmin investigated the stopping distance of a trolley. She changed the steepness of the ramp each time.. Why does Yasmin do two trials?
In order to test several different heights
To make sure the trolley travels the same distance each time
In order to predict the distance the next object will travel
To make sure the distance recorded for each object is repeatable
What happens to water when a kettleThe atoms lose electrons boils?
A new compound is formed
Molecules spread further apart
Hydrogen and oxygen atoms separate
A new compound is formed
Where is the liquid pressure the highest?
A
B
C
D
A pupil has two well-insulated containers of water at 20° C. She takes two identical blocks of aluminium, both at 100° C, and puts one into container A and the other into container B. The temperature of the water rises in each container until it reaches a steady value. Her results are shown in the table.
Explain why the final temperature of the water is lower in container B.
The energy had to be shared by more particles or water
The energy has to be shared by fewer particles of water
The aluminium block placed in container B was cooler at the start
The temperature of the water in container B was cooler at the start
Why are these puupies different from each other and from their mother?
The puppies change colour as they grow and will eventually look the same as their mother
The puppies inherited a random mix of genes from each parent which creates variation
The puppies must not with their real mother
The puppies are being fed differently which creates variation in how they look
Which statement best describes all types of sexual reproduction?
When bees carry pollen from flower to the seed of another plant
When a plant creates a genetically identical copy of itself
When make and female sex cells (gametes) join together
When a man and woman get married and have children
Cockroaches are often found in human homes. They can survive there because...
Cockroaches are dependent on humans for their survivial
Cockroaches are invertebrates
Cockroaches can be difficult to eradicate
Cockroaches can adapt their lives to live alongside humans
Which factor has a larger impact on biodiversity than climate change?
Invasive species
Pollution
Disease
Habitat loss
How does the wind help the reproductive cycle of plants?
It keeps predators away
It distributes seeds over a large area
It ensures that nearby ground is not too wet
It blows away nearby twigs and branches
The diagram shows part of a food web. If the number of grasshoppers increased which would be the most likely effect on the food web?
Decrease in the amount of grass
Decrease in the number of vultures
Increase in the number of snakes
Decrease in the number of hawks
A scientist draws a conclusion from the results of her experiment. What would a different scientist do to check the original conclusion?
Suggest a new conclusion using the same data
Evaluate the conclusion by studying the whole investigation report
Change the results to make sure that they fit the conclusion
Change the current model to fit the conclusion
A student carries out an experiment using a concentrated alkali. Which of these should she always do to ensure that she is working safely?
Open the windows
Wear safety goggles
Work in small goups only
Use only a pipette to measure the volume of the alkali.
When a solid is heated it:
Contracts
Condenses
Evaporates
Expands
Rosie poured some lavender oil into an oil burner. She heated it with a candle. The oil changed state.
Which diagram represents this change of state?
The diagrams show cells containing and surrounded by oxygen molecules.Oxygen can move into cells or out of cells. Into which cell, A, B, C or D, will oxygen move the fastest?
Reem investigates whether beaker size affects the rate of cooling of water. What information should Reem record so that she can draw a conclusion?
The room temperature at the beginning of and end of the experiment
The water temperature taken at regular intervals for each experiment
The time that the experiment started
The light intensity
What would normally be plotted on the x axis of a graph?
The independent variable
The dependent variable
The control variable
The out of control variable
Susie used chromatography to identify the coloured substances in the ink from a felt-tip pen. She used 4 different inks and water as a solvent. Which colours were present in the ink from the felt-tip pen?
Pale blue, yellow and red
Red, dark blue and pink
Yellow, pale blue and pink
Pale blue, dark blue and yellow
Ice melts if rock salt is scattered on it. This is because of:
Friction between the rock and the path
A chemical reaction between the salt and the ice
Salt lowers the freezing point of the water
Salt raises the freezing point of the water
The drawing shows a ride. The letters A, B, C, D, E and F show different points along the track. At which point does the car have the most gravitational potential energy? Give the correct letter.
A
B
D
F
Moaza put different sized jars over a lit candle. She measured the time it took for the flame to go out each time. She recorded her results in a table. How can Moaza best improve the reliability of her results?
Get results for more jar sizes
Repeat the experiment for the same jar sizes
Repeat using different sized candles
Use fewer jar sizes
The drawing below shows a garden water feature. It is solar-powered. Which form of energy to the solar cells generate?
Solar energy
Thermal energy
Chemical energy
Electrical energy
The diagram shows a simple circuit with a resistor in it. If another resistor is added the flow of electricity:
Stops
Decreases
Reverses direction
Increases
Hamda made a simple electric motor. WHen she gently spins toe coiled witre, it keeps turning on its own. This is because:
The magnet completes a circuit so that an electric force turns the coil
Electric current makes the bottom of the coil hot so if flips over
Electricity makes the coil behave like a magnet
The heat from the battery makes the magnet spin
Rubbing the plastic strip with a cloth causes the strip to become negatively charged. This happens because _____________ move from the cloth onto the plastic strip.
Choose the correct word.
Electrons
Neutrons
Protons
Atoms
Alex poured some pond water into three beakers. She then put waterweed into each beaker. She put the beakers in different places. The waterweed in the box changed from dark green to pale yellow. Why did this happen?
The box has blocked the sunlight from the waterweed and it has stopped photosynthesising
The water in this beaker is less fresh as a result of being in the dark
The water has absorbed heat which has burned the waterweed
The waterweed is photosynthesising and has used up all its chlorophyll
Muna was investigating plant growth, however at the end of the experiment, she couldn't remember how much water the plants were given. What could she do differently next time?
Use a chart to record how much water each plant is given
Keep a full watering can next to the plants
Write down the dates the plants are watered
Have different people watering them every day
A scientist has produced genetically modified rice that is rich in vitamin A. Why should she share her work with other people?
It will make the other people better scientists
It allows the other scientists to change her results
It allows the other scientists to repeat the investigation
It proves that the original scientist did the experiment herself
Which is the correct word equation for photosynthesis?
glucose + oxygen → carbon dioxide + water
carbon dioxide + water → glucose + oxygen
carbon dioxide + glucose → oxygen + water
water + oxygen → carbon dioxide + glucose
Which of these structures in a plant cell give it strength and structure?
Cell wall
Cytoplasm
Chloroplast
Vacuole
A scientist tested 4 gases by bubbling them through universal indicator solution, causing it to change colour. She then added drops of alkali to the indicator until the indicator changed back to green. Her results are shown in the table. Which gas dissolved to form the most acidic solution?
Exhaust gases from a car
Carbon dioxide
Air
Human breath
A skier activates her chemical hand warmer and drips it in the snow. The snow starts to melt. Which statement is correct?
The chemical reaction in the hand warmer is:
Endothermic because energy is absorbed
Endothermic because energy is released
Exothermic because energy is absorbed
Exothermic because energy is released
A student investigated the effect of temperature on an enzyme controlled reaction and plotted her results in a graph. She concluded that the optimum temperature for enzyme activity was 37°C
What is another valid conclusion that could be made based on this data?
There is no reaction below 20°C
The rate of reaction increases as the temperature increases up to 37°C
The rate of reaction decreases was the temperature increases up to 37°C
The reaction is fastest at the highest temperature
The Haber process is a method of making ammonia. Part of this process includes the reaction shown. In this reaction, iron (Fe) is used as a catalyst. What is the function of iron in this process?
To absorb excess heat
To increase the rate of reaction
to reduce the pressure on the reactants
to provide oxygen atoms to the products
What are the products of this reaction?
NaCl + H2O
NaOH + HCl
HCl + NaCl
NaOH + H2O
Iron is extracted from iron ore in a huge container called a blast furnace. Carbon can displace iron from iron (III) oxide. Which metal cannot be produced by heating its oxide with iron?
Tin
Aluminium
Lead
Copper
A scientist researched the hearing range of different animals. Which animal has the largest hearing range?
Bat
Chicken
Porpoise
Cat
The bar chart shows the force of gravity on eight of the planets. On which planet would your weight be nearest your weight on earth?
Mercury
Venus
Jupiter
Mars
The diagram shows the relationship between the earth and the sun. It is winter in the Northern Hemisphere. How does this model show this?
The top of the axis is tilted away from the sun
The sun is facing the earth
The earth is the furthest distance from the sun
The Northern Hemisphere is in the shadow
Why does this fruit look orange in sunlight?
The fruit absorbs orange light and reflects the other colours in sunlight
Our eyes see orange light produced by the fruit
The fruit reflects yellow and blue light which we see as orange
The fruit reflects orange light and absorbs all other colours in the spectrum
Salama investigates whether a cold drink warms up faster in a black or silver bowl. Each has the same volume of cold drink in and she leaves them in the same warm place. She measures the temperature of the drink in each can a after an hour. What is the dependent variable?
The colour of the cans
The air temperature
The drink temperature
The length of time
Proxima Centauri is the closest star to Earth after the Sun and is located 4.3 light years away from Earth. How long does it take light from Proxima Centauri to reach Earth?
1 year
43 years
4.3 years
10 trillion years
How does a magnifying glass make an object appear bigger?
Absorption
Diffraction
Refraction
Reflection
