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Photosynthesis
Test Description: Grades 6-8 Life Science
Instructions: Answer all questions to get your test result.
1) ___ is needed by all plants for survival.
A
sunlight
B
air
C
water
D
all of these
2) ___ are the plant organ system that absorbs water minerals.
A
stems
B
roots
C
leaves
D
flowers
3) ___ are the plant organ used to transport water, food, minerals throughout the plant.
A
flowers
B
roots
C
stems
D
leaves
4) ___ are the plant organs used to make food.
A
flowers
B
leaves
C
stems
D
roots
5) ___ is the process plants use to make their own food.
A
transpiration
B
photosynthesis
C
pollination
D
germination
6) Since plants can create their own food, they are often called ___.
A
decomposers
B
synthesizers
C
producers
D
consumers
7) Where do plants get the carbon atoms they need to make glucose (C₆H₁₂O₆)?
A
from fertilizer
B
from carbon dioxide in the air
C
from the soil
D
from water
8) Where do plants get the hydrogen atoms they need to make glucose (C₆H₁₂O₆)?
A
from fertilizer
B
from the soil
C
from carbon dioxide in the air
D
from water
9) What two substances must plants absorb for photosynthesis to happen?
A
carbon dioxide and oxygen
B
glucose and oxygen
C
carbon dioxide and water
D
oxygen and water
10) What two substances do plants make using photosynthesis?
A
glucose and carbon dioxide
B
glucose and oxygen
C
carbon dioxide and water
D
glucose and water
11) Which of the following is the correct chemical equation for photosynthesis?
A
H₂O + O₂ + sunlight → C₆H₁₂O₆ + CO₂
B
CO₂ + H₂O + sunlight → C₆H₁₂O₆ + O₂
C
CO₂ + C₆H₁₂O₆ + sunlight → H₂O + O₂
D
CO₂ + O₂ + sunlight → C₆H₁₂O₆ + H₂O
12) Which of the following is the correct word equation for photosynthesis?
A
carbon dioxide + water + sunlight ---- glucose + oxygen
B
water + oxygen + sunlight ---- glucose + carbon dioxide
C
glucose + carbon dioxide + sunlight ---- water + oxygen
D
carbon dioxide + oxygen + sunlight ---- glucose + water
13) Photosynthesis ___.
A
releases the energy stored inside glucose molecules
B
stores energy from sunlight inside glucose molecules
C
transforms the energy in sunlight into matter atoms
D
stores the energy from glucose molecules into sunlight
14) Photosynthesis happens in ___ .
A
plants
B
all living things
C
animals
D
plants and animals
15) Which of the following is true about photosynthesis?
A
It indirectly creates food for animals (i.e. consumers).
B
It creates oxygen that we can breathe.
C
It creates food for plants.
D
all of these are true
16) Ultimately, the ORIGINAL source of nearly all energy in living things is ___ - because of photosynthesis.
A
food
B
Earth's core
C
the Sun
D
ocean currents
*select an answer for all questions
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