Ecosystems
Chemistry
Astronomy
Electricity
100
What are the 4 nutrient cycles in our ecosystem? (T/I)
1. Water cycle
2. Carbon cycle
3. Nitrogen cycle
4. Phosphorus cycle
100
Draw a Bohr-Rutherford diagram of hydrogen. (C)
100
The larger the star the darker it is. True or false? (K/U)
False
100
List two materials that are electrical conductors and two materials that are insulators. (K/U)
Answers will vary: Conductors
Graphite
Metal
Rubber
Answers will vary: Insulators
Wood
Air
Glass
Quartz
200
Which statement describes a population? (K/U)
a) A herd of elephants and a herd of antelope in the same area
b) All the living things within the elephant herd's territory
c) Three elephant herds, a zebra herd, and a pride of lions in the same area
D)Three elephants herds that share a territory
E)Two elephant herds and the plants they eat
Three elephants herds that share a territory
200
Which of the following compounds is not correctly identified? (K/U)
a)Carbon disulfide is a molecular compound
b)KF is a molecular compound
c)Phosphorus pentachloride is a molecular compound
d)Na3N is an ionic compound
e)Sodium bromide is an ionic compound
KF is a molecular compound
200
Just like the Planets orbit around the Sun, Asteroids orbit around the Sun too. In a few sentences explain why are Asteroids not considered to be planets? (T/I)
Since they are so small and numerous, asteroids were not considered planets. "Similarly, since they are so small and have noncircular orbits that go well beyond the plane of the solar system (location of Earth, Jupiter, Saturn, and other "true" planets), comets were not considered planets.
200
Consider a 9V battery. How many cells would you expect to find inside the battery? (T/I)
What is 6 cells.
300
From the knowledge, you have from the ecosystem unit, briefly describe the process of Eutrophication by drawing a diagram. (A)
300
Using your knowledge of the periodic table and the chemistry unit, Name all 5 families in the periodic group. (A)
Alkali metals.
Alkaline earth metals.
Transition metals.
Halogens.
Noble gases.
300
A friend believes the Earth is flat, in a Gmail write a few sentences persuading the Earth is a sphere. (C)
Answers will vary:
Example;
The Earth is not flat, but rather a sphere shape. When people say that the Earth is flat, it means they can see the other side of Earth at a distance. But this is wrong, this only comes to our head because the flatness of the Earth is an allusion we see due to the size of the earth. Also when we are traveling further north, the travelers see the stars above the northern horizon and the same with the southern horizon. Imagine standing at the north pole and trying to see stars at the equator, not only would it be harder to see them but there would be some changes in the view as well.
300
Write a few sentences and explain why the use of an electric lawn mover must not connect several extension cords together when using a lawnmower, and why the extension cord wires have to be relatively thick. (C)
The explanation that electric lawnmowers can not be used is that the wire will either cut off or set the grass on fire. It can also emit sparks until the wire is severed, which will cause the grass to catch fire.
400
List four types of threats to biodiversity. Explain one of them and give an example in your explanation. (C)
(1) Draining wetlands
(2) Deforestation
(3) Damming rivers
(4) Invasive species
Invasive species is one of the many threats towards biodiversity, How? It is a threat because these alien species who no one knows about use up all the resources which are for other animals and waste them. This way the species which already lived in the ecosystem die because of no resources or food. This affects biodiversity because most of life goes extinct.
400
I have 15 protons, 16 neutrons, 15 electrons, which element am I? Draw a Bohr-Rutherford diagram of the element. (T/I)
I am Phosphorus
400
Frow the knowledge you have of astronomy and Canadian researchers. Describe one contribution from a Canadian researcher to the study of space. (A)
Answers will vary:
Example;
Ian Shelton is a Canadian astronomer and the person who discovered a supernova star.
400
How many Laws of Electric charges do we have? What are the Laws of Electric charges? (A)
3 Laws of Electric charges
1) Like charges repel
2) Opposite charges attract
3) Charged and neutral objects attract each other