YEAR 6 SCIENCE HOMEWORK WEEK 5
1. Elephants have a similar circulatory system to humans.
a) Write down the names of the three types of blood vessels in an
elephant.
ARTERY……………………………………………………………………………………………………………
CAPILLARY………………………………………………………………………………………………………
VEINS……………………………………
b) Write down the function of the heart.
TO PUMP BLOOD.
……………………………………………………………………………………………………………………………
c) One of the functions of the blood in an elephant is to transport the
gas, carbon dioxide. Write down two other substances the blood
transports.
THE BLOOD TRANSPORTS:
OXYGEN AROUND THE BODY.
ENERGY FROM FOOD EATEN.
……………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………..
d) Mention the four main components of an elephant’s blood.
RED BLOOD CELLS.
……………………………………………………………………………………………………………………………
WHITE BLOOD CELLS.
……………………………………………………………………………………………………………………………
PLASMA.
PLATELETS.
……………………………………………………………………………………………………………………………
2. Mia investigates what happens when different colorless solutions
are mixed with a colorless dilute acid. In her first experiment she:
•
measures the temperature of the acid in a glass beaker
•
adds a small volume of a colorless solution
•
measures the temperature of the mixture in the glass beaker
•
records any other observations.
Mia repeats the experiment five more times with different
colorless solutions. Look at the results of her investigation.
temperature
temperature
solution
of acid at
start in °C
after mixing
in °C
A
20
20
bubbles in a
colorless solution
B
20
32
bubbles in a
colorless solution
C
20
14
colorless solution
D
20
20
white solid
E
20
20
colorless solution
F
20
28
green solution
colorless
observations
a. Which colorless solution gives the greatest temperature change?
B…………………………………………………………………………………………………………………….…
…..
b. Which colorless solution does not react with the acid?
C………………………………………………………………………………………………………………………...
c. Give two reasons for your answer.
IT HAS THE LOWEST REACTION.
…………………………………………………………………………………………………………………
……
ii)
…………………………………………………………………………………………………………………
……
3. Soils are a mixture of clay, sand and an organic content called
humus. Chen investigates the drainage of some dry soils. Chen:
i)
•
places 20 g of dry soil W into the equipment shown
•
pours 50 cm3 of water onto the dry soil
•
measures the volume of water that drains into the measuring
cylinder in one minute.
•
repeat the experiment for each of the dry soils, X, Y and Z.
Chen’s results are shown in this table.
soil
percentage of
clay
sand
humus
volume of water collected
after one minute
in cm3
W
20
70
10
30
X
15
75
10
36
Y
70
20
10
10
Z
50
40
10
20
a. Look at the diagram. It shows the measuring cylinder of water
collected for soil Z.
25
20
15
10
Write down, in Chen’s results table, the volume of water collected for
soil Z.
b. Explain why the volume of water added to the dry soil is always 50
cm3.
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………
c. Write down the dependent and the independent variable in this
investigation.
Dependent ………………………………………………………………………………………………………
Independent……………………………………………………………………………………………………
d. Which soil has the best drainage? Circle the correct answer. [1]
W
X
Y
Z
ANSWER:X
(e) Chen repeats the investigation with a dry soil containing 90% sand
and 10% humus. Predict the volume of water collected.
36 cm3
4. Carlos investigates the time it takes salt to dissolve in water.
In his first experiment Carlos:
•
pours 100 cm3 of water into a glass beaker
•
measures the temperature of the water
•
adds 5 g of salt to the water
•
stirs the mixture
•
records the time taken for the salt to dissolve.
Carlos repeats the experiment using different temperatures of water.
Look at the results of his investigation.
temperature of
water in °C
time taken for salt to
dissolve in seconds
20
120
30
60
40
31
50
14
60
7
a) Describe the pattern in these results.
NUMBERS ARE GOING HIGH TO LOW.
……………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
b) Plot a bar graph temperature of water against time taken for the
salt to dissolve to show the results above.
c) Use the particle model to explain this pattern.
……………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………
5. Complete the sentences. Choose from the words below.
Break
Soil
Rock
The earth crust consists of ROCK. Rain and ice BREAK up the
rocks. The small rock particles become SOIL.
This question is about objects in the Solar System.
(a) Complete the table by adding the correct name of each
planet.
planet
distance from the Sun in
millions of km
MERCURY
58
VENUS
228
EARTH
108
MARS
150
JUPITER
4495
SATURN
2871
URANUS
1434
NEPTUNE
779
(b) A planet moves in a path around the Sun. Write down the
name of this path.
ORBIT…………………………………………………………………………………………………
…………
(c) The Moon moves around the Earth. Circle the time it takes
the Moon to complete one cycle around the Earth.
24 hours
28 days
1 week
365 days
28 DAYS