Intro to Photosynthesis

In photosynthesis, plants convert ​ (a)   energy into ​ (b)   energy.

​

• radiant
• electrical
• chemical
• mechanical

Tags

NGSS.MS-LS1-6

Three Anacharis plants were placed inside inverted test tubes filled with water. One test tube was exposed to low light, another to medium light, and another to high light. The table provided shows the results of this experiment. Notice that more oxygen was produced by the Anacharis in high light. Based on the information provided, what is the difference in volume (in mL) of oxygen produced between the low-light and high-light plants after 45 minutes?

Answer explanation

The plant with more light produced 1.1 mL more oxygen than the plant with low light.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

What sustains life on Earth?

Answer explanation

The chemical energy or glucose stored in plants

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following best summarizes photosynthesis?

• A process by which plants produce sugar using the energy of sunlight

• An exchange of gasses between animals and the air or water of their habitat

• An adaptation of plants that allows them to add nutrients to the soil

• A chemical reaction involving nitrogen and other atmospheric gasses

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

An incomplete diagram of the process of photosynthesis is provided. What is the missing component that correctly replaces the question mark to complete the diagram?

• Glucose

• Soil nutrients

• Thermal energy

• Water

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Students are observing an aquatic plant. They understand that the bubbles they see rising from the cut stem of the plant are the gasses produced during photosynthesis. Which of the following observations provides the best evidence that light is the source of energy for photosynthesis?

• The frequency of bubbling increases in bright light and slows to a stop in darkness.

• The bubbles always rise to the surface of the water, moving towards the light.

• Plants observed in artificial or in natural light were both seen to produce bubbles.

• The orientation of the light seems to have no effect on the production of bubbles.

Tags

NGSS.MS-LS1-6

The concentration of carbon dioxide in parts per million (ppm) was measured for a closed container in several situations. Which of the following data collected would demonstrate the action of photosynthesis?

• Plants in the container kept in darkness did not lower the concentration of carbon dioxide below 800 ppm.

• When the container included a plant exposed to light, carbon dioxide concentration went from 800 to 600 ppm.

• When multiple plants were put in the container, carbon dioxide concentration never got above 1,000 ppm.

• When carbon dioxide concentration went from 800 to 1,000 ppm the temperature in the container went up.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Students are provided with a choice of two solutions. Each one is used to test for the presence of a different chemical. How could the students use one of these solutions to gather evidence for the action of photosynthesis?

• Pump the air from a closed container containing a plant through a sample of lime water

• Grind up all parts of a plant, expose them to heat, collect the gas, and use lime water to test it

• Use Fehling’s solution with the roots of several different species of plants, after boiling them for several minutes

• Use Fehling’s solution on plant leaves exposed to light and on plant leaves covered in aluminum foil for a week

Tags

NGSS.MS-LS1-6

Match the following:

• Photosynthesis

• Where photosynthesis take place

• Chloroplasts

• The process by which radiant energy from the Sun is
    transformed into chemical energy

• Glucose

• What plants need in order for photosynthesis to occur

• Products

• The form in which the chemical energy is stored in cells
    during photosynthesis

• Reactants

• The results of photosynthesis as glucose and oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The Sun emits radiant energy toward Earth's surface. Plant cells contain organelles called ​ (a)   . Filled with chlorophyll, they absorb radiant energy. During photosynthesis, plants produce ​ (b)   and oxygen from the ​ (c)   of solar energy, water, and carbon dioxide. The process of photosynthesis occurs in ​ (d)   and some ​ (e)   .

• chloroplasts
• sugar
• reactants
• phytoplankton
• plants

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

NGSS.MS-LS1-7