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SCIENCE VIDEO QUIZ

Total questions: 15

Worksheet time: 5mins

Name
Class
Date
1.

About how many percent of the food that we eat is carbohydrates?

a)

40

b)

50

c)

60

d)

70

2.

The gas needed by plants to make their own food is ______________.

a)

Air

b)

Carbon dioxide

c)

Hydrogen

d)

Oxygen

3.

______________ is the special organelle found only in plant cells.

a)

Chlorophyll

b)

Chloroplast

c)

Mitochondria

d)

Stomata

4.

Plants take in carbon dioxide through the ____________ and obtain water in roots in order to build carbohydrates.

a)

cell membrane

b)

stomata

c)

chloroplasts

d)

pores

5.

The number range of chloroplasts found in each plant cell is ___________.

a)

10 - 100

b)

20 - 100

c)

30 - 100

d)

NONE OF THE ABOVE

6.

Photosynthesis goes through a water-splitting reaction in the presence of __________.

a)

Carbon dioxide

b)

Oxygen

c)

Sunlight

d)

ALL OF THE ABOVE

7.

An example of a simple carbohydrate is __________.

a)

cellulose

b)

glucose

c)

starch

d)

sugar

8.

The fiber-containing carbohydrate that the human body cannot break down is __________.

a)

cellulose

b)

glucose

c)

starch

d)

sugar

9.

Humans and plants are intricately connected because plants give off oxygen that humans need for breathing.

a)

TRUE

b)

FALSE

10.

Carbohydrates contain the following elements:

a)

C, H, N

b)

C, H, O

c)

C, C, O, N

d)

H, O, N

11.

When we eat carbohydrate-rich food, it is broken down into __________.

a)

carbon

b)

fiber

c)

glucose

d)

starch

12.

______________ is the organelle in a human cell where carbohydrates are broken down in the presence of oxygen to form ATP molecules.

a)

Food vacuole

b)

Mitochondria

c)

Nucleus

d)

Ribosome

13.

Chlorophyll’s most important role in photosynthesis is to __________.

a)

give color to leaves of plants.

b)

reflects light to the surroundings.

c)

trap light to energize electrons.

d)

NONE OF THE ABOVE

14.

_____________ can be found in lettuce, broccoli, and celery while ____________ can be found in potatoes, corn, and rice.

a)

Cellulose, starch

b)

Fiber, protein

c)

Starch, cellulose

d)

Sugar, starch

15.

The raw materials and products of photosynthesis are as follows:

a)

carbon dioxide, oxygen ---> glucose

b)

glucose, water ---> oxygen, carbon dioxide

c)

water, carbon dioxide ---> glucose, oxygen

d)

water, oxygen ---> glucose, carbon dioxide