Organisms In The Enviroment

Question 0

What does chlorophyll absorb

Answer 0

Suns light energy

Question 1

What plants carry out photosynthesis

Answer 1

Green plants and algae

Question 2

Word equation for photosynthesis

Answer 2

Carbon dioxide + water —-(light energy)—–> glucose + water

Question 3

Process for photosynthesis

Answer 3

Carbon dioxide taken in by leaves and water up by roots. Chlorophyll traps light energy for photosynthesis. The light energy used to covert carbon dioxide and water into glucose, oxygen is released as a by-product.

Question 4

What is some of the glucose converted into?

Answer 4

Insoluble starch for storage

Question 5

How can you test for starch

Answer 5

Iodine (I owe dean money for starch)

Question 6

How can you identify the starch in the leaf?

Answer 6

Green patches on leaf with chlorophyll will turn iodine black/blue to show that starch has been made

Question 7

Where does the energy for photosynthesis come from?

Answer 7

Sun light energy

Question 8

During photosynthesis what is light energy transferred to

Answer 8

Chemical energy

Question 9

What’s the symbol equation for photosynthesis

Answer 9

CO2 + H2O —-> C6H12O6 + O2

Question 10

Balance the symbol equation CO2 + H2O ——> C6H12O6 + O2

Answer 10

6CO2 + 6H2O —–> C6H12O6 + 6O2

Question 11

Why do enzyme reactions slow down

Answer 11

If it is cold

Question 12

When do plants grow best

Answer 12

When they have enough light, carbon dioxide and water and are kept at a suitable temp

Question 13

What’s an independent variable

Answer 13

One that is being tested

Question 14

Dependent variable

Answer 14

One you must measure

Question 15

Control variable

Answer 15

One you keep the same

Question 16

The uses of soluble glucose

Answer 16

Converted I to insoluble starch for storage, used fir respiration, converted into fats and oils, used to produce cellulose which strengthens cell walls, used to produce proteins

Question 17

What do plants and algae need to make proteins

Answer 17

Nitrate ions which is a mineral ion

Question 18

What factors must be controlled in a greenhouse to improve plant growth?

Answer 18

Temperature, light levels and carbon dioxide levels

Question 19

Physical factors that affect the distribution of organisms

Answer 19

Temp, nutrients availability, amount of light, water availability, oxygen availability, carbon dioxide availability

Question 20

Why are there so few animals living in very cold regions such as the Arctic

Answer 20

Arctic plants small limits number of plant eaters which can survive in area

Question 21

What’s a quadrant

Answer 21

Square frame that can be subdivided into a grid

Question 22

Range

Answer 22

High - low =?

Question 23

Mean

Answer 23

Sum of readings divided by the number of readings

Question 24

Median

Answer 24

Middle value when in order

Question 25

Mode

Answer 25

Reading most frequent

Question 26

How can you make sure an investigation is valid

Answer 26

That all variables are controlled

Question 27

Repeatable

Answer 27

Original experiment repeats investigation using same method and equipment and obtains same results.

Question 28

Reproducible

Answer 28

Investigation is repeated by another person or by using different equipment and same results obtained

Question 29

Three physical factors affect the distribution of plants

Answer 29

Temp, light levels and carbon dioxide levels

Question 30

Why would there be little point in heating a greenhouse on a summers day?

Answer 30

Enzymes denature and photosynthesis stops taking place

Question 31

Limiting factor

Answer 31

Anything that puts a cap on the rate of photosynthesis

Question 32

How can you use a quadrat to make a line transect

Answer 32

5metres from the start at each point to build up an understanding of the habitat/area

Question 33

Difference between mean and median

Answer 33

Mean is average median in the middle