Grade 7 Science

Grade 6
Science Summer Work
Name: ___________________
International School of Arts and Sciences ISAS
2013 – 2014
A. Earth’s Amazing Atmosphere
The Earth’s atmosphere is divided into four layers. Choose the layer in
Column B that best matches the description in Column A, and write your
answer in the space provided. Then, use the directions below to label the
diagram of the Earth’s atmosphere on the next page.
Column A
_____ 1. the layer of the Earth’s atmosphere you
live in
_____ 2. the coldest layer of the Earth’s
atmosphere; lies directly below the
uppermost layer
Column B
a troposhere
b. stratosphere
_____ 3. the uppermost layer of the atmosphere
c. mesosphere
_____ 4. the layer that contains most of the
atmosphere’s ozone; above the layer that
you live in
d. exosphere
1.
Label the four layers of the atmosphere on the diagram on the
next page.
2.
There is no clear boundary between the uppermost layer of the
atmosphere and space. The atmosphere becomes thinner and
thinner and blends into space. At the very top of the diagram, write
the word space with an arrow pointing up.
3.
The ozone layer is the upper part of the atmospheric layer that
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contains most of the atmosphere’s ozone. Use the symbol for ozone
to draw in the ozone layer on the diagram.
4.
The ozone layer is important because it absorbs ultraviolet
radiation. Draw a wavy line coming from space to represent the UV
radiation that is absorbed by the ozone layer.
5.
Ions are electrically charged particles. When nitrogen and
oxygen atoms absorb solar energy in the lower thermosphere, they
become ions. This part of the thermosphere is called the
ionosphere. Draw the ions in the ionosphere. Remember that the
thermosphere is very thin. There are almost no ions near the top of
the thermosphere.
6.
The troposphere is the densest layer of the atmosphere. It is
much denser than the other layers. Shade this layer heavily to
indicate how dense it is.
7.
The stratosphere is very thin. Shade this lightly.
8.
The mesosphere is even less dense than the stratosphere.
Shade this layer very lightly.
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BIOMES
1. For the following biomes, give 2 examples of animals and 1
example of plants that are found in those biomes.
Biome
Animal 1
Animal 2
Temperate
grassland
Chaparrals
Tropical Savanna
Tundra
E. weather and Climate
1. List two differences between climate and weather?
Climate
Weather
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Plant
2. Why are the climates on the two sides of the mountain very different?
3. What factors distinguish one biome from another biome?
4. List all of the Earth’s land biomes?
5. Which one of the above biomes is the hottest and which one is the
coldest.
6. Which one of the above biomes is the most fertile?
7. Identify each biome in the following pictures.
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1. Read the following article and fill in the vocabulary
crossword.
An Atom Apart:
by Leslie Cargile
Have you ever walked through
a cloud of gnats on a hot summer,
only to have them follow you? No
matter how you swat at them, or
even if you run, they won’t leave
you alone. If so, then you have
something in common with an atom.
Atoms are the building blocks of molecules, which when
combined, make up everything. From the smallest one-celled
amoeba, to every person who has ever lived, to the largest and
brightest stars in the sky, atoms are everywhere.
Even way back in the time of ancient Greece, they wondered
about atoms. That’s where the word comes from, ancient Greece.
The word A’tomos, when translated into English, means:
something thatcannot be divided any further. So what’s an atom look
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like? Up until very recently no one could say one way or another.
Technically we can’t see individual atoms, since there are no
microscopes powerful enough. Since technology improves all the
time, it may not be long before we can actually see a whole atom
through a special microscope. Even though scientists cannot see
atoms with microscopes, they have developed ways to detect them
and learn about them.
Atoms are made up of three basic parts; protons, neutrons,
and electrons. There is a core, or nucleus, and an electron cloud.
The nucleus is made up of positively charged protons and neutral
neutrons. The nucleus is held closely together by electromagnetic
force.
Protons and neutrons make up the nucleus of the atom. A
cloud of electrons orbits the nucleus. The negatively charged
electrons are bound to the nucleus, and zap around it in a cloud.
Do you remember the cloud of gnats? The gnats would be the
electrons zipping around you, the nucleus.
There are different ways atoms are classified. They can be
classified into elements, like oxygen, carbon, or hydrogen. All of the
elements known to man so far can be found on the periodic table.
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The number of protons an atom has decides the chemical
element. The number of electrons defines the atom's chemical
properties, like its melting temperature and boiling point.
The study of atoms and tiny particles that are even smaller is
called quantum mechanics. Scientists still have much to learn
about atoms. Maybe you will enter the study of quantum mechanics
and find a brand new element. Maybe they’ll even name it after you!
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2. Perform the following lab experiment and fill up the
table below with your picture doing all the different
steps:
Blowing up balloons with CO2:
What you’ll need:
1) Balloon
2) About 40 ml of water (a cup is about 250 ml so you
don’t need much)
3) Soft drink bottle
4) Drinking straw
5) Juice from a lemon
6) 1 teaspoon of baking soda
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Instructions:
1. Before you begin, make sure that you stretch out the
balloon to make it as easy as possible to inflate.
2. Pour the 40 ml of water into the soft drink bottle.
3. Add the teaspoon of baking soda and stir it around
with the straw until it has dissolves.
4. Pour the lemon juice in and quickly put the stretched
balloon over the mouth of the bottle.
What’s happening?
If all goes well then your balloon should inflate! Adding the lemon
juice to the baking soda creates a chemical reaction. The baking
soda is a base, while the lemon juice is an acid, when the two
combine they create carbon dioxide (CO2). The gas rises up and
escapes through the soft drink bottle, it doesn't however escape the
balloon, pushing it outwards and blowing it up. If you don't have
any lemons then you can substitute the lemon juice for vinegar.
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Draw a figure of the procedure you have followed:
Draw a figure of how the balloon looked like after the experiment
was over:
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3. Solve this crossword puzzle about ecosystems:
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4. Make an ecosystem at home using the following figure
as a guideline and tape a picture of your ecosystem in
the provided box:
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5. Draw the water cycle in the box below:
Make sure you include the following labels in your figure:
a) Condensation
b) Precipitation
c) Evaporation
d) Infiltration
e) Groundwater
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6. Find the words below in the word puzzle:
Q
N
E
A
R
T
H
Z
E
Q
G
V
I
T
C
P
W
R
C
L
L
O
T
E
A
S
U
N
R
U
Z
V
H
D
F
O
N
L
I
Z
K
J
N
E
O
T
U
L
P
A
O
U
Y
I
F
H
1. Gravity
2. Corona
3. Sun
4. Uranus
5. Neptune
6. Pluto
7. Earth
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7. Put the following food chains in order:
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8. Examine the following figure and answer the questions:
The Atomic mass of Chlorine is: 35.
a) What is the number of electrons?
_____________________________________
b) What is the number of protons?
_____________________________________
c) What is the number of neutrons? (show your work)
_____________________________________
d) If Chlorine had an isotope, would the atomic number change?
Yes or no? and Why?
_____________________________________________________________
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9. Open the following link and run the experiment on it to
determine the different melting points and boiling points of
objects:
http://www.harcourtschool.com/activity/hotplate/index.html
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10.
Watch the following video about the how the planets
move in orbits and write a small report on it in the provided
section:
http://www.harcourtschool.com/activity/science_up_close/616/deploy/interface.html
Your Report:
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
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_____________________________________________________________
_____________________________________________________________
_____________________________________________________________
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_____________________________________________________________
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Science Links of fun activities and games:
1)
http://www.harcourtschool.com/menus/science/grade6_nl
.html
2)
http://www.ecokids.ca/pub/games_activities/wildlife/inde
x.cfm
3)
http://pinterest.com/search/pins/?q=science
4)
http://scifun.chem.wisc.edu/
5)
http://www.sciencekids.co.nz/experiments.html
6)
http://www.livescience.com/28170-25-fun-facts.html
7)
http://dsc.discovery.com/
8)
http://kids.discovery.com/
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