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Basic Needs of Humans Warmth

Basic Needs of Humans Warmth

Air

13.    Which three of the diseases shown in the box below can be caused by smoking?              Circle     the correct

answers. arthritis measles common cold bronchitis lung cancer obesity heart disease chicken pox

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14.     A food web is shown below. fox toad hedgehog weasel

slug

caterpillar

vole

green plant          Use this food web to answer the questions.         (a)    Name two predators of the hedgehog.

and 1

(b)     Name an animal that is both predator and prey. 1         (c)     From the food web, complete this food

chain.                                 fox 1

15.     Different mammals need different amounts of sleep per day. A giraffe sleeps for only 4 hours per day. A sloth, however,

spends 20 hours per day sleeping. Sleeping 14 hours per day, a hamster gets twice as much sleep as a guinea pig, which sleeps for 7 hours per

day.         (a)     Use this information to complete the table below.              Mammal Sleep per day (hours)

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2         (b)     Use this information to complete the bar graph.              (Another copy of this graph, if required,

can be found on Page nineteen)     22     20     18     16     14 Sleep     12 per day (hours)     10     8     6     4     2

0 Giraffe Mammal

16.     Fossil fuels are our main energy sources.         (a)     Which gas in the air is used up when fossil fuels burn?

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1         (b)     Why is it important to conserve our supplies of fossil fuels? 1 17.         Read the information below and use it to

label the diagram.           Distillation can be used to separate alcohol from a mixture of alcohol and water. The mixture is heated in

a distillation flask. Alcohol vapour passes through a column filled with glass beads. A Leibig condenser uses cooling water to change the alcohol

vapour into a liquid. The liquid drips into a conical flask.

thermometer      cooling water out

cooling water in  alcohol /water mixture

18.     The boxes below show different substances which can pollute the environment. 1 CFCs sulphur dioxide smoke pesticides

litter mining waste 2 oil mining waste smoke CFCs pesticides oil

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4

(a)     Which box shows three substances which can pollute the land?              Box number 1

(b)     Which box shows three substances which can pollute the air?                       [Turn over

19.     Read the passage and then answer the questions below.          When a volcano erupts, the material that rises to

the surface is called magma.          There are two main types of magma­ — basic magma and silicic magma. Basic magma contains

less than 55% silica and is very hot, reaching a temperature of about 1200  °C. Basic magma is fast flowing. Silicic magma contains between 55%

and 70% silica. Silicic magma is slow moving and only reaches temperatures of about 700 °C.          When the magma reaches the surface, it

can form lava and hot gases. If the volcano is underwater the lava cools quickly to form rock formations called pillow lava. If the volcano is on

land the lava can flow and cool to form layers of volcanic rock.          (a)     What temperature is reached by fast flowing basic magma?

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1         (b)     Which type of magma contains the higher percentage of silica?              (c)     Where would you find

volcanoes that form pillow lava?              (d)     A magma has a silica content of 60%.              List two

other pieces of information about this magma.     1     2 1 1 1

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20.     Plastic is one type of waste that can be recycled.         (a)     What does recycled mean?

1         (b)    Give one other type of waste that can be recycled. 1 21.         Electrical plugs have safety features.

For example, the cable grip prevents the wires being pulled out of the pins.          Label the diagram to show two other

safety features in the plug.

cable grip cable 2

22.     Alison timed how long it took to boil water using kettles with different power ratings.      Power rating (kW) 1 1 1 2 2 2

(a)     Volume of water (l) 0·5 1·0 1·5 0·5 1·0 1·5 Time to boil (s) 225 460 580 110 225 285

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(i)     Complete the sentence by circling the correct word in the box. As the power rating increases, the time to boil the same volume of

water decreases stays the same increases 1 .

(ii)    Draw one other conclusion from the information. 1

(b)     Predict the time to boil 0·75 litres of water using a kettle with a 1  kW power rating.                 s 23.

The box shows the names of some substances. cement iron zinc sand wood glass 1

(a)     Which substance is mixed with copper to make the alloy called brass? 1         (b)    Which two substances

are mixed with aggregate to make concrete?      [3700/27/01] and Page sixteen 1

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24.     The graph shows how the resistance of a thermistor changes with temperature. 800 700 600 500 Resistance (ohms) 400 300

200 100 0 0 10 20 30 40 50 60 70 80

(a)    Draw one conclusion from the information in the graph.

1         (b)     What is the resistance of the thermistor when the temperature is 40 °C?              …………..ohms 1

25.     The table shows the energy content of 100 g of different cheeses.

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Cheese Brie Cheddar Edam Parmesan Ricotta

Energy content (kJ/100 g) 1120 1680 1320 920 400

(a)     Calculate the energy content of a 50 g portion of Brie. Space for working

Answer        kJ (b)     How much more

energy is there in 100 g Cheddar compared with 100 g of Ricotta? Space for working

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