Read each question carefully. Each question has four possible answers, from which you are to choose the most correct or best answer.
Choose the BEST answer for each question.
Make sure to review your answers before submitting them
Good Luck!
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Three types of symbiotic relationships are
host, commensalism, and mutualism
commensalism, mutualism, and predator
commensalism, mutualism, and parasitism
parasitism, positive, and mutualism
A mutual relationship has which of the following characteristics?
two organisms of the same size
two organisms, both feeding another organism
two organisms of the same species
two organisms, both benefitting from the relationship
Which of the following is a basic human need?
Telephone
Water
Pop
Air conditioner
An example of a bioticpart of an ecosystem is ...
Sand
Wind
Precipitation
Micro-bacteria
Tapeworms live inside organisms and feed on the nutrients of the organism they live in and weakens it. A tapeworm is an example of
Patriotism
Mutualism
Parasitism
Commensalism
Organisms in an ecosystem can be classified as producers or consumers. The producers provide food for the consumers. An organism that eats both producers and other consumers is called an
herbivore
omnivore
carnivore
prey
Organisms that eat only producers are known as
herbivores
omnivores
carnivores
Predators
Crows are known for eating dead animals. This type of consumer is known as a:
Predator
Scavenger
Decomposer
Prey
Photosynthesis is the food production process that takes place in this part of the plant
roots
stem
flower
leaves
A food chain is a convenient way to show how _________ moves among living things in an ecosystem.
food
sugar
energy
interaction
Food chains and food webs are models in science, which visually show us the different relationships within an ecosystem. The primary difference between the food chain and the food web is
a food chain shows how energy is stored
a food web shows how energy is used
a food web is a complex system of food chains
a food chain is a combination of different food webs
All living things need water to live. The water cycle has four main processes. The two processes that return water to the earth are
evaporation and condensation
condensation and precipitation
transpiration and condensation
evaporation and transpiration
The two processes that release water back into the atmosphere are
evaporation and condensation
condensation and precipitation
transpiration and condensation
evaporation and transpiration
The introduction of a new species to an area will likely negatively impact the native species in that. Scientists call this introduction of new species
bioinvasion
biodiversity
biohazardous
biomagnification
Succession is a gradual process within an ecosystem in which some species replace other species. When a forest fire destroys a certain area, regeneration occurs. This is an example of
micro-succession
eco-succession
primary succession
secondary succession
The first living species to arrive in an area are usually algae and fungus. Together their mutual relationship is visible in the form they can be observed - lichen. Lichen grows on bare rock and is considered to be the
invasive species
primary species
pioneer species
climax species
To reduce our ecological footprint, we can
consume more water and less food
create more waste and recycle it
use materials that require less energy to produce
take longer more relaxing showers
Some species are at risk of no longer existing. This means that they could become
extinct
endangered
overhunted
relocated
Four organisms in an ecosystem are listed below. What is the correct order for the food chain?
grasshopper, domestic cat, robin, grass
grasshopper, robin, domestic cat, grass
robin, domestic cat, grass, grasshopper
grass, grasshopper, robin, domestic cat
The structure in seed plants that contains an embryo, that will form a new plant is the
root
stem
seed
leaf
The function of the root is to
absorb water
reproduce
support
produce food
It is during this stage of the plant reproduction cycle that the seed plant has flowers
germination
seed
seedling
adult
A white carnation is placed in a bottle of blue-coloured water. After a couple hours, the white carnation turned blue. Why did this occur?
It’s due to transpiration, in which the coloured water goes up the stem due to the opening of the stoma
It’s due to transpiration, in which the coloured water goes up the stem due to the opening of the vein
It’s due to transpiration, in which the coloured water goes up the stem due to osmosis
It’s due to transpiration, in which the coloured water goes up the stem due to reverse gravity
Soil is a natural resource. The components of soil include organic matter and minerals. When soil contains partly decayed organic matter, it is called
clay
sand
humus
vegetative
Farmers need to make money when growing crops. Most farmers only grow one type of crop in a particular area. This type of farming is called
shelterbelts
mini-cropping
monoculture
single-cropping
Many flowering plants rely on pollinators, such as bees, which are
Plants and animals carrying flowers
Organisms that carry pollen from one flower to another
Birds and insects that feed on the plants
Fruits that fall of the plants
Plants provide food and they make the food through the process of photosynthesis. In this process
They make food from sun and energy
They make food from water, carbon dioxide and oxygen
They make food from water, carbon dioxide and sunlight
They make food from water, oxygen and sugar
Soil has mineral and organic particles. The three main types soil are
Loam soil, grain soil and clay soil
Loam soil, clay soil and sandy soil
Loam soil, gravel soil and sandy soil
Loam soil, gravel soil and clay soil
Crop rotation helps to keep soil healthy. Crop rotation is
The practice of planting a different crop in a different area of a field every year
The idea of planting all crops together in one area
The practice of selectively breeding specific crops
The idea of increasing biodiversity while planting
The three states of matter are
Ice, water, and steam
Liquid, solid, and volume
Insulators, conductors, and heat
Solids, liquids, and gases
Which of the following would be an example of a heat insulator?
a gold bracelet
a copper pot
an iron nail
a wooden spoon
How are particles are arranged in a liquid state of matter?
Particles are tightly bound to one another
Particles can vibrate
Particles loosely attached to one another
Particles are not attached to each other at all
There are three important ideas that make up the particle model of matter. Which of the following statements is not one of these ideas?
All substances are made of particles, some of which cannot be seen.
All substances are made of tiny particles
Particles are always in motion.
Particles have spaces between them.
Which of the following energy transfers would be correct?
thermal energy in a hot drink is transferred to cold hands
thermal energy is transferred from a room to a heater, to be heated
an ice cube loses thermal energy when it melts in hot lemonade
thermal energy is lost by a match when it is lit
Solids made of different metals were all heated to 100° C to determine how their volume and length would be affected. Which statement describes the most likely outcome of this experiment?
all the volumes changed the same amount and the lengths remained constant
all the volumes changed, but each substance was the same length
only some of the volumes changed with their length being increased
all of the volumes changed and so did their lengths
You board a crowded elevator. Soon after the doors close and the elevator starts to move, you find that you feel uncomfortably warm. Why?
All the people are radiating energy.
The cooler air is rising to the ceiling of the elevator
The air temperature is increasing because the elevator is moving upward.
Thermal energy is being conducted through the air
The devices that use winds to produce electricity. Their use is increasing throughout Alberta. What is their source of power?
geothermal energy
fossil fuels
wind energy
active solar heating system
An experiment testing the effect of heat on different liquids was performed by grade 7 science students. Which of the following variables would have been the manipulated variable?
the amount of heat used
the different types of liquids
the size and type of glass tubing each liquid would rise
the different levels each of the liquids reached in the glass tubing
The thermal energy of a substance is the
total kinetic energy of all the particles
average kinetic energy of the particles
kinetic energy of each particle separately
measure of how hot or cold the substance is
When thermal energy is added to a solid the volume of the solid will change. Steel beams bending or even breaking in a bridge, because of an extreme change in temperature are a result of thermal _____
conduction
contraction
expansion
design
Materials that allow an easy transfer of heat are called
conductors
insulators
eneregizers
thermals
Insulators are rated by their insulating ability. R-value is given to each material that is used in the construction of a building. The best insulating product would have a ____
low R-value
high R-value
fractional R-value
restricted R-value
Which would have more thermal energy: a 10-L pot of soup at 89 degrees Celcius or a 300-mL cup of soup at 89 degrees Celcius?
the cup
the pot
they would both have the same thermal energy
none of the above
The transfer of energy in a fluid is very different. The heated particles become less dense and so they rise, with the colder, more dense particles rushing in to take their place. This type of thermal energy transfer creates a ...
conduction current
concurrent current
radiative pathway
convection current
A kettle of water is placed on the stove. Heat is transferred through the water by the process of
conduction
convection
radiation
absorption
When the thermal energy from the sun reaches our planet, which method of heat transfer occurs?
conduction
convection
radiation
all of the above
There are two types of solar energy heating systems. The system using direct Sun rays is called ____
active
activating
positive
passive
Natural sources of energy can be renewable and non-renewable. A non-renewable energy source would be
coal
wind
solar
solar and win
Canadian inventor, Norman Breakey, made a revolutionary invention in 1940. The paint roller served a very important function, which was to paint a large area …
faster and easier
with less skill required
with better quality paint
in a more expensive way
Spider webs are examples of structures that can hold up to 4000 times the weight of the spider that made it. The spider web is a ___
solid shell structure
solid frame structure
natural shell structure
natural frame structure
How a structure is put together, how it is shaped and the types of materials that are used to build it are all part of the structure's
purpose
function
design
direction of strength
The actual effect of a force depends on three things: the magnitude or size of the force; the direction of the force; and _____
how the force is applied
where the force is applied
why the force is applied
how long the force is applied
The standard unit of measuring force is named after a famous English scientist, who was the first to describe the ‘law of gravitation’, getting the idea for the law as he sat under an apple tree. This unit of measuring force is similar to the amount of force needed to hold an apple in your hand and is called a__
Joule
kilogram
Newton
dynamic
The unit of measuring mass is ___
Newton
Joules
Kilograms
Hertz
Identify which structure would have the greatest stability, because of its centre of gravity
High centre of gravity and a narrow base
High centre of gravity and a wide base
Low centre of gravity and a narrow base
Low centre of gravity and a wide base
A dynamic load on this train bridge is the ___
tracks
train
arch
bricks
Three internal forces that are classified by the direction in which they act are
compression, tension, and exertion
tension, compression, and shear
shear, exertion, and stress
curvature, twisting, and bending
What type of bridge is it?
Suspension bridge
Cable stayed bridge
An arch bridge
Column bridge
Structural safety is affected by environmental factors such as
soil stability, material failure, overcrowding
climate, building components, terrain
earthquakes, hurricanes, tornados
terrain, climatic conditions, earthquake risk
Fixed joints are rigid to prevent any ____________