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WorksheetsMendip Year 10 Science assessment Paper 1
Total questions: 63
Worksheet time: 32mins
Sperm cells and egg cells carry genetic information.
What is the name of the chemical that carries genetic information?
DFS
DVD
DNA
TCP
1.2 What are sperm cells and egg cells?
Gametes
Genes
Homozygous
Phenotype
1.3 Which process produces sperm cells?
Fertilisation
Homeostasis
Meiosis
Respiration
1.4 Mice have 40 chromosomes in each body cell. How many chromosomes will be in each sperm cell?
10
20
40
80
1.5 A mouse will always have black fur if one or two black fur alleles are inherited.
What word describes the black fur allele?
Dominant
Recessive
Heterozygous
Homozygous
Two black mice both have one black fur allele (B) and one brown fur allele (b).
Complete the genetic diagram in Figure 1 to show the possible offspring of these mice.
BB
bb
BBbb
Bb
1.7 Two black mice both have one black fur allele (B) and one brown fur allele (b).
What alleles will a mouse with brown fur have?
bb
BB
Bb
bB
What is the chance of the offspring from the two black mice being brown?
25%
50%
75%
100%
2.1 Table 1 shows the relative mass and charge of the particles in an atom. What is the relative mass of a neutron
0
1
2
very small
What is the charge on a neutron
0
+1
-1
very small
What is the charge on an electron
0
+1
-1
2.2 Figure 2 represents a lithium atom.
Give the number of protons in the lithium atom shown in Figure 2.
2
3
4
7
Give the number of neutrons in the lithium atom shown in Figure 2.
2
3
4
7
Give the number of electrons in the lithium atom shown in Figure 2.
2
3
4
7
2.3 match the atomic model above to the stage in the development of the atomic model.
Dalton atoms
Neutrons discovered
Nucleus of atoms discovered
Plum pudding model
2.4 match the atomic model above to the stage in the development of the atomic model.
Dalton atoms
Neutrons discovered
Nucleus of atoms discovered
Plum pudding model
3.1 This question is about gases in the air.
Figure 3 represents a molecule found in air
What is the formula of the molecule shown in Figure 3?
Co2
2CO
CO2
CO2
What is the name of the molecule shown in Figure 3? You may use the periodic table to help you.
3.3 The percentage of oxygen in air is 21%.
The mass of air in a classroom was 220 kg Calculate the mass of oxygen in the classroom.
4620kg
22kg
241kg
46.2kg
3.4 Carbon monoxide is an air pollutant. Describe how carbon monoxide is produced from fuels.
Carbon monoxide can decrease the concentration of oxygen in the blood.
Which part of the blood would be most affected by carbon monoxide?
Red blood cells
Plasma
Platelets
White blood cells
What two effects could a decreased concentration of oxygen in the blood have on body cells?
Cell death
Decreased respiration rate
Faster cell division
Faster cell growth
More energy released
3.7 Some air pollutants cause acid rain. Give one problem caused by acid rain.
Figure 4 shows the lower surface of a leaf magnified 800 times.
Name hole A in the leaf surface.
4.2 Name cell B.
4.3 Cell B can lose or gain water
Complete the sentence.
Cell B can gain water by ...................
active transport
condensation
osmosis
photosynthesis
transpiration
4.4 Cell B can lose or gain water
Complete the sentence.
Water vapour can escape from the leaf through hole A by ..................
active transport
condensation
osmosis
photosynthesis
transpiration
Which factors increase the rate of water loss from hole A? (tick 2 answers)
Increasing acidity
Increasing nitrogen concentration
Increasing oxygen concentration
Increasing temperature
Increasing wind speed
4.5 Give one reason why the movement of water in a plant is important.
4.6 The African Baobab tree has no leaves for up to 9 months of the year. Suggest how this helps the tree to survive in an area where there is not much rain
4.7 Figure 4 is a photograph taken through a microscope. The image is magnified 800 times.
One of the cells in the image has a width of 12 mm Use the equation to work out the real width of the cell in millimetres.
Real width of object = width of image ÷ magnification
15
1.5
0.15
0.015
Convert the real width of the cell from millimetres to micrometres. 1 millimetre = 1000 micrometres.
15
1.5
0.15
0.015
5.1 The concentration of glucose in the blood is controlled by homeostasis. box 0 5 .
Give one other example of an internal condition controlled by homeostasis
5.2 Figure 5 shows the change in glucose concentration in the blood of a person with box Type 1 diabetes.
Calculate the increase in blood glucose concentration between 1 pm and 2 pm in mmol/dm3
5.3 Suggest at what time the person ate lunch.
5.4 Name the hormone the person injected that caused the blood glucose concentration to decrease.
5.5 Explain the decrease in blood glucose concentration after the hormone was injected.
(Use all the words in the box in your explanation.)
5.6 Normal blood glucose concentration is approximately 4 mmol/dm3
What could be the reason for the blood glucose concentration falling below normal at 4 pm?
The food contained too much glucose
The person ate another meal
The person injected too much hormone
The person fell asleep
5.7 Explain what would happen to the blood glucose concentration if the person went for a run at 6 pm.
5.8 Look at Figure 5. Suggest one way that the graph would be different for a person who does not have diabetes.
6.1 The stopping distance of a car depends on the thinking distance and the braking distance.
Give one factor that can affect the braking distance.
6.2 The thinking distance is the distance travelled during the driver’s reaction time.
A car was travelling at 13 m/s The driver’s reaction time was 0.6 s
Calculate the thinking distance. Use the equation:
distance travelled = speed × time
13.6 m
7.8m
78m
1.36m
6.3 The braking distance of the car was 14.0 m What was the stopping distance of the car? (use your result from last answer)
6.4 What is the link between speed and braking distance? Complete the sentence. The greater the speed, the ....
greater the braking distance
smaller the braking distance
Smaller the stopping time
7.1 A student investigated the rate of reaction of magnesium with dilute hydrochloric acid.
This is the method used.
1. Add 50 cm3 of dilute hydrochloric acid to a conical flask. 2. Add 0.2 g of magnesium ribbon to the dilute hydrochloric acid in the conical flask.
3. Attach a gas syringe to the conical flask.
4. Record the volume of gas in the gas syringe every 10 seconds.
Figure 5 shows the student’s results.
Calculate the mean rate of reaction for the first ten seconds
Mean rate of reaction = volume of gas ÷ time taken
1.7
17
0.17
170
7.2 What is the unit for the mean rate of the reaction calculated in Question 7.1
cm3/s
s/cm3
g/s
s/g
7.3 Give two conclusions you can make about the reaction from 90 s to 120 s Use Figure 5.
7.4 The student repeated the method using magnesium powder instead of magnesium ribbon. All other variables were kept the same.
What is the independent variable in the investigation?
Surface area of magnesium
Temperature of reaction
Volume of gas collected
Volume of hydrochloric acid
8.1 Some students tested a red cabbage leaf for starch. This is the method used.
1. Boil the leaf in ethanol.
2. Rinse the leaf in water.
3. Add the reagent to test the leaf for starch.
Give one safety precaution the students should take in this test
8.2 Which reagent is used to test the boiled leaf for starch?
Benedict’s solution
Biuret solution
Iodine solution
Sodium chloride solution
8.3 What colour will be seen if the test for starch is positive?
Blue-black
Pale pink
Orange
Red
The students then used paper chromatography to investigate the coloured pigments in a red cabbage leaf.
Complete the sentence. Choose answers from the box
Chromatography can be used to (a) mixtures.
In paper chromatography, the paper is part of the stationary phase.
The solvent is called the (a) phase.
8.4 Table 2 shows the students’ results. box The distance each pigment moved was measured from the start line.
The solvent moved 110 mm from the start line.
Calculate Rf value X in Table 2. Give your answer to 2 significant figures.
8.5 The known ranges of Rf values of some pigments are shown in Table 3.
The Rf value for the orange pigment in red cabbage leaves is 0.91 What is this orange pigment most likely to be?
Carotene
Chlorophyll a
Chlorophyll b
Xanthophyll
9.1 When a metal carbonate reacts with an acid, a salt, carbon dioxide and water box are produced.
Describe how you would test for carbon dioxide gas and give the result of the test.
9.2 Describe how to make pure dry crystals of magnesium chloride from magnesium carbonate and a dilute acid.
In your method you should name the apparatus and reagents you plan to use.
(6 marks)
10.1 An energy input of 1.3 × 10 box 18 J is supplied each year by power stations to the National Grid. Not all of this energy is supplied to consumers. Some of the energy is wasted in the distribution process.
Write the equation which links efficiency, total input energy transfer and useful output energy transfer.
10.2 An energy input of 1.3 × 10 box 18 J is supplied each year by power stations to the National Grid. Not all of this energy is supplied to consumers. Some of the energy is wasted in the distribution process.
The energy supplied each year to consumers is 1.2 × 1018 J Calculate the efficiency of the distribution process.
10.3 How is electrical power transmitted across the National Grid to make the process as efficient as possible?
At a high potential difference and a high current
At a high potential difference and a low current
At a low potential difference and a high current
At a low potential difference and a low current
10.4 Write the equation which links energy transferred, power and time.
10.5 A wind turbine supplies a power output of 8000 kW for 1200 seconds. Calculate the energy transferred by the wind turbine in kJ
10.6 Describe the environmental advantages and disadvantages of using wind turbines to generate electricity in the UK. (4 marks)
