1
2
3
10
4
11
5
12
6
13
Calderglen High School
7
14
8
15
9
1
Which elements are present
in CARBOHYDRATES?
answer
•Carbon, Hydrogen and Oxygen.
Calderglen High School
2
What is the ratio of hydrogen and
oxygen in a CARBOHYDRATE?
answer
•Hydrogen and Oxygen have a 2:1
ratio
Calderglen High School
3
Give some uses for
CARBOHYDRATES?
answer
1. Food
2. For making Fuels
Calderglen High School
4
What is the formula for
Glucose
?
answer
C6H12O6
Calderglen High School
5
What is STARCH and how is it
made?
answer
•A complex carbohydrate
•Made when many Glucose
molecules join together
(polymerise)
Calderglen High School
6
What is the test for Starch?
answer
Iodine solution turns blue/black
Calderglen High School
7
What is the test for GLUCOSE?
answer
Benedict’s solution turns
orange/red
(when heated)
Calderglen High School
8
Why do plants make
STARCH?
answer
They make starch from
glucose to store energy
Calderglen High School
9
How is starch broken down?
answer
Starch is broken down during
digestion in the body.
Calderglen High School
10
Which carbohydrate can pass
through the gut wall into the
bloodstream?
answer
GLUCOSE
(small, soluble molecule)
(starch is large and insoluble – can’t pass across
gut wall)
Calderglen High School
11
Which process breaks down
glucose for energy?
answer
RESPIRATION
Calderglen High School
12
What is the word equation for respiration?
answer
glucose + oxygen  energy + carbon + water
dioxide
Calderglen High School
13
What is
PHOTOSYNTHESIS?
answer
The process by which plants make
carbohydrates from carbon dioxide
and water using light energy
Calderglen High School
14
What gas is released as a by-product
of photosynthesis?
answer
Oxygen
(O2)
Calderglen High School
15
How are essential oils extracted
from plants?
answer
STEAM
DISTILLATION
Calderglen High School