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Grade 8 Finals 22/23 > Science 8 > Flashcards

Science 8 Flashcards

1
Q

What is Aqueous Solution?

A

An aqueous solution is a solution in which the solvent is water.

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2
Q

What is Buoyancy?

A

The upward force on an object, against the force of gravity produced by the surrounding fluid.

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3
Q

What is a Buoyant force?

A

The upward force a fluid exerts on an object.

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4
Q

What is Compressibility?

A

A force acts on a fluid, and that fluid is under compressibility.

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5
Q

What does Concentrated mean?

A

Present in a high proportion relative to other substances; having had water or other diluting agent removed or reduced.

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6
Q

What is Concentration?

A

The amount of solute dissolved in a specific amount of solvent.

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7
Q

What is Density?

A

The amount of matter in a given volume.

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8
Q

What does Dilute mean?

A

Make a liquid thinner or weaker by adding water or another solvent to it.

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9
Q

Define a Fluid.

A

(Usually a liquid or gas) A substance that has no fixed shape, resists deformation and can flow

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10
Q

Define Gas.

A

A substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid).

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11
Q

What is a Heterogeneous Mixture?

A

A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture.
EX. Vegetable soup is a heterogeneous mixture. Any given spoonful of soup will contain varying amounts of the different vegetables and other components of the soup.

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12
Q

What is a Homogeneous mixture?

A

A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. EX. The saltwater is homogeneous because the dissolved salt is evenly distributed throughout the entire saltwater sample.

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13
Q

Define Joule.

A

The unit of work or energy is equal to the work done by a force of one Newton when its point of application moves one meter in the direction of action of the force.

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14
Q

Define a Liquid.

A

A liquid is a type of matter with specific properties that make it less rigid than a solid but more rigid than a gas. A liquid can flow and does not have a specific shape like a solid. Instead, a liquid conforms to the shape of the container in which it is held.

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15
Q

Define Newton.

A

force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. (Measurement of force)

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16
Q

Define Pascal.

A

The Pascal is the unit of pressure and is also used to quantify internal pressure, and stress.

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17
Q

What is Pressure?

A

The continuous physical force exerted on or against an object by something in contact with it.

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18
Q

What does Saturated mean?

A

Holding as much water or moisture as can be absorbed; thoroughly soaked.

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19
Q

What is the Saturation Point?

A

The point at which there are so many of a thing that no more can be added successfully.

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20
Q

What is a Solid?

A

A substance or object that is solid rather than liquid or fluid.

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21
Q

Define Solubility.

A

The ability to be dissolved, especially in water

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22
Q

What is a Solute?

A

The substance that dissolves in a solvent.

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23
Q

What is a Solvent?

A

The substance that dissolves the solute.

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24
Q

What does Unsaturated mean?

A

Not saturated

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25
Q

Define Viscosity.

A

The state of being thick, sticky, and semifluid in consistency, due to internal friction. (resistance to flow)

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26
Q

What does WHMIS stand and HHPS for?

A

Workplace Hazardous Materials Information System
Hazardous Household Product Symbols

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27
Q

What is a hazard symbol?

A

It is a warning symbol on hazardous materials.

28
Q

Describe the difference between a pure substance and a mixture.

A

Pure substance- made up of one type of matter and has a unique set of characteristics/properties.

Mixture- two or more substances combined.

29
Q

What is Matter?

A

anything that has a mass and occupies space.

30
Q

What is a pure substance?

A

made up of one type of matter and has a unique set of characteristics/properties.

31
Q

What is a mixture?

A

made up of more substances combined together.

32
Q

What are cells?

A

Cells are the smallest unit of life and perform all the processes of living organisms.

33
Q

What is stimulus?

A

It is the change in an organisms environment

34
Q

What is a response?

A

It is how an organism reacts to a change in its environment.

35
Q

What are structures?

A

they are body parts that are developed for specific functions.

36
Q

What are functions?

A

they are specific tasks carried out by the structures.

37
Q

What are organs?

A

groups of tissues that work together to perform a specific function.

38
Q

What are organ systems?

A

They are a group of organs that work together to perform a certain task.

39
Q

The structures and function of the circulatory system are…

A

The Heart, arteries, veins, capillaries, and blood all transport oxygen, food and other substances. They also transport some wastes to other organs for elimination. They defend the body against diseases. Also, connect all the different organ systems.

40
Q

The structures and function of the Respiratory system are…

A

Nose, mouth, trachea, diaphragm, bronchi, and lungs. The function is to transport oxygen from the outside air to the blood. They also transport CO2 from the blood to the outside air.

41
Q

The structures and function of the Digestive system are…

A

Salivary Glands, mouth, esophagus, stomach, liver, pancreas, gall bladder, small and large intestine. They break down food pieces into much smaller pieces (particles) so they can be absorbed and transported throughout the body

42
Q

The structures and function of the Nervous system are…

A

brain, spinal cord, nerves, eyes, ears, and other sensing organs (hands, nose, etc.) They all coordinate and control the actions of all organs and organ systems as well as detect, process, and respond to changes in external and internal environments

43
Q

The structures and function of the Excretory system are…

A

kidneys, bladder, lungs, skin, and liver. They all remove chemical and gaseous wastes from the blood

44
Q

The structures and function of the Skeletal system are…

A

bones and cartilage both provide a movable support frame for the body and also protect soft-tissue organs such as the heart and lungs

45
Q

The structures and function of the Muscular system are…

A

muscles and tendons move bones and also Move organs that contain muscle tissue (such as the heart and stomach)

46
Q

The structures and function of the Integumentary system are…

A

The skin protects the body’s internal environment from the external environment * senses pain, pressure, and temperature

47
Q

What are tissues?

A

they are a group of similar cells working together to perform a specific function

48
Q

What do organ systems combined form?

A

AN ORGANISM!!!!!

49
Q

What are organelles?

A

structures in cells that perform a CERTAIN function.

50
Q

What structures make up an organism?

A

Cells-> Tissues-> Organs-> Organ Systems-> ORGANISM

51
Q

What is the difference between a Multicellular organism and a Unicellular organism?

A

Multicellular
- eat, move, and react to stimuli, and get rid of waste products and reproduce
- rely on many specialized cells to meet their needs
- have tissues and organs
- different multicellular organisms have many of the same organelles
Unicellular
- eat, move, and react to stimuli, and get rid of waste products and reproduce
- rely on specialized structures within one cell to meet their needs
- lack tissues and organs
- different unicellular organisms have many of the same organelles

52
Q

What is an adaptation?

A

Adaptation is a characteristic that allows an organism to live in its environment.

53
Q

What are structural and behavioural adaptations?

A

Structural- difference in the physical appearance to help them live in their environment
EX. Snow rabbits’ fur turns white during the winter season
Behavioural- difference in the behaviour to help them live in their environment
EX. Migration

54
Q

Define Multicellular.

A

an organism composed of many cells, which are to varying degrees integrated and independent

55
Q

What is amplitude?

A
56
Q

What are binoculars and how do they work?

A
57
Q

Define Bioluminescence.

A
58
Q

Explain a Concave lens and Mirror.

A
59
Q

Explain a Convex lens and Mirror.

A
60
Q

What is the Crest?

A
61
Q

What is Diffuse Reflection?

A
62
Q

Define Frequency.

A
63
Q

What is Opaque and name an example.

A
64
Q

What is the ray diagram?

A
65
Q

What is the difference between a real image and a virtual image?

A
66
Q

What is a reflecting telescope and how does it work?

A

Grade 8 Finals 22/23 (3 decks)

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