Question

photosynthesis
what do you need to survive? food, shelter, water?
plants need different things, too. but plants are a little bit different. they need water, air, like we do,
they use from food, but they dont get from animals. they make their own food. a reactant is what is needed
for a reaction to take place. the reactants is water,
carbon dioxide, and the energy from the sun.
chlorophyll is a green pigment that absorbs
sunlight. chlorophyll absorb sunlight.
it allows the plant to absorb sunlight.
chloroplasts of the leaf. chloroplasts are the
organelles where photosynthesis takes place and is
only found in plant cells.
the plant obtains water and nutrients from the soil.
they are absorbed through the xylem and phloem
of the plants roots, stems, and leaves. carbon
dioxide from the air enters the plant through the
stomata on the underside of the leaves.
the three reactants carbon dioxide (co₂),
water(h₂o), plus light energy produce the food the
plants need to survive and grow.
the products of photosynthesis are glucose in the
form of sugar, and oxygen. products are
substances that are formed in a chemical reaction.
without the process of photosynthesis,
wouldnt survive. without plants, animals and
humans couldnt survive! the chemical equation for
photosynthesis is written:
6co₂ + 6h₂o → c₆h₁₂o₆ + 6o₂

1. which of the following does not happen during

photosynthesis?
a. o₂ is given off.
b. glucose is made.
c. the suns energy is reflected.
d. chlorophyll absorbs the suns
energy.

1. which is the correct (unbalanced) equation for

photosynthesis?
a. h₂o + → co₂ + o₂
b. o₂ + h₂o → sugar + energy
c. co₂ + h₂o + → sugar + o₂
d. + h₂o → h₂o + sugar +

1. where on the leaf does carbon dioxide enter the

plant?
a. stomata
b. xylem
use the vocabulary words from
ead
it\ to complete the following
sentences.
reactants products
chloroplasts photosynthesis
chlorophyll
when we look at a plant, we notice that the leaves
are green. this is due to the pigment (4)
in the
leaves that allows the plant to absorb sunlight. plants
use the light energy in a reaction called (5)
where they make food in the form of sugar and
produce oxygen. (6) which are only found in
where the food making reaction takes

Explanation:

Question 1:

Step1: Recall photosynthesis process

Photosynthesis is the process where plants use \(CO_2\), \(H_2O\) and light energy to make glucose (\(C_6H_{12}O_6\)) and \(O_2\). During this, \(O_2\) is released (A is true), glucose is made (B is true), chlorophyll absorbs sun's energy (D is true). Chlorophyll absorbs, not reflects, sun's energy. So C is false.

Step2: Identify the incorrect statement

From the options, C says "The Sun’s energy is reflected" which is wrong as chlorophyll absorbs it.

Step1: Recall photosynthesis equation

The correct unbalanced equation for photosynthesis is \(CO_2 + H_2O + \text{Light Energy}
ightarrow C_6H_{12}O_6 + O_2\) (or in simpler terms, reactants \(CO_2\), \(H_2O\) and energy to form glucose and \(O_2\)). Let's check options:

• Option A: \(H_2O + \text{[Energy]}

ightarrow CO_2 + O_2\) (Wrong, reactants and products mixed)

• Option B: \(O_2 + H_2O

ightarrow \text{Sugar} + \text{Energy}\) (Wrong, \(O_2\) is a product, not reactant)

• Option C: \(CO_2 + H_2O + \text{[Energy]}

ightarrow \text{Sugar} + O_2\) (Correct, matches photosynthesis: \(CO_2\) and \(H_2O\) with energy make sugar (glucose) and \(O_2\))

• Option D: \(\text{[Energy]} + H_2O

ightarrow H_2O + \text{Sugar} + \text{[Energy]}\) (Nonsensical, repeats \(H_2O\) and energy)

Step2: Select the correct equation

Option C has the correct reactants (\(CO_2\), \(H_2O\), energy) and products (sugar, \(O_2\)).

Step1: Recall plant structure for gas exchange

Stomata are small openings on leaves that allow gas exchange (like \(CO_2\) entry, \(O_2\) exit). Xylem is for water transport. So \(CO_2\) enters the plant through stomata.

Step2: Choose the correct structure

Option A is stomata, which is where \(CO_2\) enters.

Answer:

C. The Sun’s energy is reflected.

Question 2: