Photosynthesis Test

Which of the following are products of photosynthesis? (Select 2)

• glucose

• light

• water

• oxygen

Answer explanation

Photosynthesis produces glucose and oxygen. Glucose serves as an energy source for plants, while oxygen is released as a byproduct into the atmosphere.

Tags

NGSS.MS-LS1-6

Which shows the REACTANTS for photosynthesis?

• oxygen & carbon dioxide

• dirt & oxygen

• water & carbon dioxide

• carbon dioxide & leaves

Answer explanation

The reactants for photosynthesis are water and carbon dioxide. Plants use these substances, along with sunlight, to produce glucose and oxygen through the process of photosynthesis.

Tags

NGSS.MS-LS1-6

How many molecules of carbon dioxide does a plant need to make one molecule of glucose?

• 6

• 55

• 100

• 1

Answer explanation

A plant requires 6 molecules of carbon dioxide (CO2) to produce 1 molecule of glucose (C6H12O6) during photosynthesis. This process is essential for converting light energy into chemical energy.

Tags

NGSS.MS-LS1-6

How do water and nutrients get from the roots to the leaves of a plant?

• Stomata

• Xylem

• Leaves

• Roots

Answer explanation

Water and nutrients travel from the roots to the leaves through the xylem, which are specialized vessels in plants that conduct this essential fluid upward.

Which of the following are the reactants of photosynthesis?

• O₂ + Glucose(sugar)

• CO₂ + O₂

• CO₂ + Glucose(sugar)

• CO₂ + H₂O

Answer explanation

The reactants of photosynthesis are carbon dioxide (CO2) and water (H2O). They are used by plants to produce glucose and oxygen through the process of photosynthesis, making CO2 + H2O the correct choice.

Tags

NGSS.MS-LS1-6

Which of the following are the products of photosynthesis?

• O₂ + Glucose(sugar)

• CO₂ + O₂

• CO₂ + Glucose(sugar)

• CO₂ + H₂O

Answer explanation

The products of photosynthesis are glucose (sugar) and oxygen (O2). During this process, plants convert carbon dioxide (CO2) and water (H2O) into glucose and release O2 as a byproduct.

Tags

NGSS.MS-LS1-6

What structure allows carbon dioxide to enter a plant and oxygen to leave during photosynthesis?

• Roots

• Flowers

• Stomata

• Vascular bundle

Answer explanation

Stomata are small openings on the surface of leaves that allow carbon dioxide to enter the plant and oxygen to exit during photosynthesis, making them essential for this process.

Tags

NGSS.MS-LS1-6

How does most of the water needed by the plant get into its leaves?

• The roots absorb it and then it travels up the stem

• It enters through the stomata

• It's made during a chemical reaction in the leaf

• The flowers capture water and deliver it to the leaves

Answer explanation

Most of the water needed by the plant enters through the roots, which absorb it from the soil. This water then travels up the stem to reach the leaves, where it is used for photosynthesis and other vital processes.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Why does photosynthesis occur only during the day in most plants?

Answer explanation

Photosynthesis occurs only during the day in most plants because it requires sunlight to convert carbon dioxide and water into glucose and oxygen. Without light, the process cannot take place.

Tags

NGSS.MS-LS1-6

How do plants help reduce the amount of carbon dioxide in the atmosphere?

Answer explanation

Plants absorb carbon dioxide during photosynthesis, converting it into oxygen and glucose. This process significantly reduces atmospheric CO2 levels, helping to mitigate climate change.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3