What's the cause of the green in plants?
Chlorophyll
Hemoglobin
Melanin
Carotene
Which gas do plants release during photosynthesis?
Carbon Dioxide
Nitrogen
Oxygen
Hydrogen
What energy source do plants use for photosynthesis?
Moonlight
Electricity
Sunlight
Heat
Which part of the plant contains the most chlorophyll?
Roots
Leaves
Stem
Flowers
What percentage of Earth's oxygen is produced by plants?
0.2
0.5
0.7
0.9
Which simple sugar do plants produce during photosynthesis?
Fructose
Glucose
Sucrose
Lactose
What time of day do plants photosynthesize most actively?
Dawn
Noon
Dusk
Night
Which season do plants typically photosynthesize most?
Winter
Spring
Summer
Fall
What color of light do plants absorb most for photosynthesis?
Green
Red
Blue
Yellow
Which plant structure allows gases to enter and exit leaves?
Veins
Stomata
Cells
Stems
How many minutes of sunlight does a plant typically need daily?
60 minutes
240 minutes
360 minutes
720 minutes
What percentage of sunlight energy is typically converted to sugar by plants?
0.01
0.05
0.1
0.2
Which famous scientist first discovered photosynthesis in 1771?
Isaac Newton
Joseph Priestley
Charles Darwin
Louis Pasteur
What temperature range is best for photosynthesis?
50-60°F
68-86°F
90-100°F
100-110°F
Which common house plant is known for being excellent at producing oxygen?
Snake Plant
Cactus
Spider Plant
Aloe Vera
How many chloroplasts are typically in one plant cell?
10/20/2025
20-40
40-60
100-200
What color are autumn leaves when chlorophyll breaks down?
Blue
Purple
Orange
Black
Which plant has the fastest rate of photosynthesis?
Bamboo
Corn
Sugarcane
Pine Tree
How much water does an average tree release into the air each day?
10 gallons
100 gallons
500 gallons
1000 gallons
What percentage of a plant's mass comes from air (CO2)?
0.05
0.25
0.5
0.95
