Science 6
Mr. Melnik
Name___________________________
Date______________
Chapter 9 and 10 Review
Answer the questions in full sentences AND draw a picture or diagram.
Example:
Name, describe and draw a picture of an extreme environment that is really hot.
The extreme environment which is really hot is called a volcano. Volcano is a place where the earth
magma comes to the surface through the vents in the earth’s crust. Volcanoes are hot because the earth
is very hot inside and when the magma comes out it flows out as lava. Lava is actually a molten rock.
Questions:
1) Name, describe and draw an extreme environment that neither has water nor air!
a. Define “extreme” and “environment”
“Extreme” means that the conditions are difficult or in some cases impossible for humans to survive
“Environment” means all the objects and substance, including all living organisms, soil, water, air etc.
that surround us.
An extreme environment with no air and no water is Outer Space.
2) Name, describe and draw pictures of TWO technology devices that help Inuit people to survive
in the Arctic.
Parka is a tight fitting, double-layered jacket that prevents body heat from escaping. This ensures that
the body stays warm. The Intuits make parkas from animal fur.
Snowshoes –allow Inuits walk on snow rather than fall through. Snowshoes spread the weight across
wider surface than the regular boot surface and hold the body on the snow’s surface.
3) Name, describe and draw a picture of an extreme environment of your choice. Why is it
extreme? What technology do people need to have to survive in this environment?
Ocean –is an extreme environment. It is hard for humans to survive in the ocean because people cannot
breathe under the water without help of technology. There is also immense pressure under water which
increases with depth.
4) What is RADAR and how does it work? Describe and draw a picture.
RADAR stands for Radio Detection And Ranging and uses radio signals (waves) to help people navigate. It
works by sending the radio waves through any medium (air, water and even space) and can bounce back
off an object and tell us the location, speed, shape and direction of that object.
5) What is common between SONAR and Echolocation that animals like bats use? Explain and
draw a picture.
SONAR device sends sound signal (waves) through air or water and similar to that a bat flying at night
sends a sound pitch which bounces off objects and “tells” the bat about the obstacles.
6) How does insulation works? Describe the process. Draw a picture that explains why air is a
better insulation than metals
Insulation means that the air close to your body does not move out and stays close to your body.
Trapped air is a very good insulator, because air does not conduct heat very well
7) What is SCUBA? Draw a picture that shows how SCUBA improved deep ocean exploration.
SCUBA is Self Contained Underwater Breathing Apparatus. SCUBA made it easier and safer to explore
the deep ocean as the air supply can be “taken” with the diver.
8) Why don’t boats sink? Why can submarines go deep under water? Draw pictures and explain
Buoyancy
Boats don’t sink because they are made of materials that are less dense than water.
Submarines can go under water because they can control its buoyancy. Buoyancy is ability to float
To control its buoyancy, the submarine has ballast tanks and auxiliary, or trim tanks, that can be
alternately filled with water or air (see animation below). When the submarine is on the surface, the
ballast tanks are filled with air and the submarine's overall density is less than that of the surrounding
water. As the submarine dives, the ballast tanks are flooded with water and the air in the ballast tanks is
vented from the submarine until its overall density is greater than the surrounding water and the
submarine begins to sink (negative buoyancy).
9) Name one special contribution made by Canada to exploration of the deep oceans.
The Newt Suit was developed by Canadians to help scientists explore deep ocean. It was developed by
Vancouver diver Phil Nuytten and it looks like something an astronaut wear underwater.