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Grade 7 Science and technology
Review questions for Jan Exam 2014
THE LIVING WORLD:

Taxonomy:
Complete the sentence “Keep plates….” And write what is the correct classification in order.

Species
1) Are the species described in each statement from the same species? Explain your answer
a)
A zebra has large black stripes. Another zebra has smaller stripes. They both live in the
same habitat but they don’t mate.
b)
It may happen that moose can mate with a cow. However, they may not have offspring.
c)
A female Doberman dog may mate with a male lab. They will have offspring that are mix
of both parents. They will also be able to have offspring one day.
2) Here is a list of eatable mushrooms.
-
Pleurotus ostratus
- Lepiota naucina
- Belotus edulis
-
Pleurotus porrigens
- Lepiota procera
- Pleurotus ulmarius
In that list of mushrooms :
a)
How many are from the same genera? Name them
b)
How many species are there?
3) Read the following statements. Choose the correct definitions of species.
a) The individuals are completely identical
d) The individuals may reproduce
b) The individuals have similar characteristics
e) Their offspring are sterile
c) The individuals cannot reproduce
f) Their offspring are fertile

Physical adaptations
1.Indicate in the following statements, which is a physical or behavioural adaptation. Write a “p”
if its physical and “b” if it’s behavioural.
a)
Wolves urinate on the ground to indicate their territory ______
b)
The red squirrel has paws that look like hands that help them grasp their food
______
c)
Skunk will spray a liquid to defend themselves from their predators ______
d)
The cardinal has a short and thick beak and its powerful to cut seeds and eat
insects ______
e) The frog has V shaped legs to jump long distances ______
f) Cactus has leaves shaped like needles which helps to limit the evaporation of water.
g) When a rabbit hears a sudden sound, it stops moving. It will stay in place until its feels
safe.
h) When a baby is born, he cannot walk. After a few months, he can start to walk.
 Habitat and ecological niche
a) Name the habitat of a scorpion in the Sahara desert.
b) If the scorpion eats insects, what is his role in nature (producer, consumer or decomposer?)
c) What is the role in nature of an animal that eats dead matter?
d) What is the role in nature of a living beings that produce energy for other living beings.
e) What is the role in nature of a living being that eats other smaller animals?
f) Create a food chain in which you must have 1 producer, 2 consumers and 1 decomposer.

Characteristics of a living being
Is a computer living or non-living? Explain why

Cellular components visible under a microscope
1)
2)
3)
4)
What is the function of the mitochondria?
Which organelle holds all our genetic information?
Which organelle stores water and waste?
Which part of the cell looks like jelly in which the organelles live?
Label the animal cell: cell membrane, cytoplasm, vacuole, nuclear membrane, nucleus,
THE EARTH AND SPACE WORLD:

Tectonic plate movement p316-318
1) What are tectonic plates? Where do you find them?
2) What do diverging tectonic plates create?
a) Ocean floor
b) Mountains
c) Volcanoes
d) Tornadoes
3) What do converging tectonic plates create? (There are two good answers)
a) Ocean floor
b) Mountains
c) Volcanoes
d) Tornadoes
4) Explain why we find the same fossils in Africa and in South America.

Orogenesis (mountain formation)
4) What is another word used for mountain formation?
a) Pengea

b) Orogenesis
c) Seismic reaction
Earthquake
8) What is an epicenter?
9) Explain what are earthquakes and where do they happen choose one: a)in the crust b) the
mantle c) core ?
10) What does the Richter scale measure?
11) Read the following examples of disastrous earthquakes.
Year
Country
Richter scale
Number of deaths
1988
Armenia
6.9
25 000
1995
Japan
7.2
6 500
1999
Turkey
7.4
17 000
2003
Iran
6.6
830 000
2004
Japan
6.8
40
a)
Amongst the earthquakes mentioned above, which one was caused by the strongest
vibrations? Explain your answer.
b)
The earthquake which occurred in Iran in 2003 had more deaths than the one in Japan
in 1995. How do you explain this?
12) What causes tsunami?
13) What is the difference between a volcano and a mountain?

Diagram of principles (design plan)
A diagram of principles or design plan describes in a simple way the parts that make up an
object or device and explains how they work.
You can draw arrows that show a rotation or a translation.
Example: draw a flash light:
(translation movement of pushing the knob)
13) Draw a door knob: draw the door knob with an arrow showing the movement.
14) Draw a pair of scissors