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Science 7A > Unit Three > Flashcards

Unit Three Flashcards

1
Q

Plants are used by humans for….

A

Food and Fibre

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2
Q

Definition: Fibre

A

Tissue of a plant

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3
Q

Other uses for plants are…(4)

A

Prevention of erosion
Cleaning and filtering water
Shelter
Using carbon dioxide and giving off oxygen

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4
Q

–% of the worlds food supply is based on seven crops.

A

75

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5
Q

What seven crops is the food supply in the world?(7)

A 
Wheat 
Rice
Maize(Corn)
Potatoes
Barley
Cassava
Sorghum
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6
Q

What comes from a cocoa tree?

A

Chocolate

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7
Q

What comes from Canola?

A

Vegetable Oil

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8
Q

What comes from Seaweed?

A

Ice cream and yogurt

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9
Q

What comes from sugar beets?

A

Sugar

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10
Q

Examples of plants and fibre are…(3)

A

Cotton
Hemp
Flax

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11
Q

There are more than —- medicines today made from plants.

A

7000

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12
Q

Morphine=

A

Opium poppies and pain killers

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13
Q

Aspirin=

A

White willow bark

Pain relief

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14
Q

Quinine=

A

Cinchona trees

Prevention of Malaria

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15
Q

Plants are also used for…

A

Fuel

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16
Q

Definition: Plant roots

A

Often the tip of the iceberg

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17
Q

What do roots do?(3)

A

Anchor the plant
Absorb water and minerals
Store food for the plant

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18
Q

Definition: Taproot

A

A single root with many more small roots coming out of it. Goes deep into the ground.

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19
Q

Definition: Root hairs

A

Tiny hairs that cover the small roots coming out of a taproot, they also increase the area the plant can absorb nutrients from

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20
Q

Definition: Fibrous roots

A

Small similar roots that soak up moisture

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21
Q

These are edible roots…(5)

A 
Carrots
Beets
Turnips
Radishes
Parsnip
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22
Q

The difference between diffusion and osmosis is…

A

Osmosis is the movement of water, diffusion is the movement of water and gas

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23
Q

Definition: Differentially Permeable membrane

A

Let’s some through but some not

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24
Q

Function of a stem are…(3)

A

Transport water and nutrients
Provide support
Food storage

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25
Types of stems are...(4)
Tuber(potato) Corn(crocus) Rhizomes(cattails runner(Strawberry)
26
Definition: Leaves
The energy producers of the plant
27
Why are leaves green?
They are green because of the chlorophyll in them(from the pigment)
28
Definition: Chlorophyll
The pigment in plants that make them green.
29
Definition: Respiration
The process of plants releasing co2 and taking in o2 Always at night
30
Definition: Genes
The part of a cell that controls plants characteristics
31
Definition: Asexual and vegetative reproduction
Grafting Layering Cutting
32
Definition: Pollination
The process of pollen traveling to a female cone
33
Definition: Flowers
Job is to attract insects that will spread the plant pollen to other plants
34
The parts of a flower are...(7)
``` Ovule Stamen Pistil Petals Sepal Stigma Style Ovary ```
35
The stigma is...
Sticky tip of the pistil that catches pollen
36
Definition: Style
The tube connecting the stigma and the ovary
37
The ovary is...
A tiny chamber that holds the ovules(eggs)
38
What is a ovule
An egg
39
A stamen is...
Male part of a flower
40
A pistil is...
Female part of a flower
41
A petal is...
Usually brightly coloured
42
A Sepal is...
The green part found underneath the flower.
43
Each stamen has two parts the----and the------.
Filament | Anther
44
The filament is...
The stalk
45
The anther is...
The tip, it produces pollen.
46
The first step of pollination is...
The pollen grain lands on the stigma.
47
The second step of pollination is...
A pollen tube grows down the style into the ovary and enters a ovule
48
The third step of pollination is...
The sperm travels down the tube to fertilize the egg
49
once a plant is pollinated, a----is formed
Seed
50
Inside seeds is a l | Tiny living plant called an...
Embryo
51
Definition: Fruit
A growing ovary of a plant.
52
How are seeds are dispersed?(3)
Wind and water Carried by animals and insects Machines used by humans
53
Definition: Sustainability
Being able to grow food and fibre while keeping our natural systems healthy.
54
Crops in Alberta are...(8)
``` Specialty crops Alfalfa Potatoes Canola Legumes Oats Barley Wheat ```
55
Definition: Irrigation
Watering crops by pipes and sprinklers
56
Definition: Monoculture
Growing only one type of plant in a field
57
Definition: Erosion
Soil that is blown away by wind and water
58
Definition: Desertification
As result of a drought, desert takes over agricultural land
59
Five main factors for soil development are...(5)
``` Parent material Vegetation Landscape Climate Time ```
60
Definition: Humus
Very fertile land, holds water very well
61
Four things that break down dead organisms are...(4)
Bacteria Fungi Microscopic actinomycetes Earthworms
62
Healthy plants require these six nutrients.(6)
``` Nitrogen Calcium Potassium Magnesium Sulfur Phosphorous ```
63
Salty soil is caused by...
Too little vegetation and to much water
64
Soil erosion is caused by...
To much cultivation
65
Definition: Hydroponic technology
Growing plants without dirt.
66
Why are dandelions plant pests?(5)
``` Powerful roots Broad leaves Super seeds Adaptable Chemical weapons ```
67
Definition: Introduced species
A species that is not common in the area
68
Pests can be controlled by...(4)
Herbicides Pesticides Insecticides Fungicides
69
Definition: Organic food
Food grown without the use of pesticides or chemical fertilizers
70
Other methods that can replace "cides" are...(5)
``` Biological control Cleaning equipment Cutting weeds Removing weeds Sowing ```

Science 7A (12 decks)

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