A test tube is filled with water and a green plant called elodea. When the plant is exposed to sunlight, it begins to produce bubbles. Which of the following is the most likely conclusion for the identity of the gas in the bubbles?

• Carbon dioxide

• Oxygen

• Nitrogen

• Hydrogen

Plants use photosynthesis to meet their survival needs by enabling them to -

• convert radiant energy into chemical energy.

• change carbohydrates into proteins.

• release carbon dioxide into the atmosphere.

• capture oxygen from water molecules.

The diagram provided illustrates the process of photosynthesis, including the substances used by and produced by plants. What is the identity of the chemical represented by the question mark in the diagram?

• Hydrogen

• Water

• Carbon

• Nitrogen

Green plants use sunlight to make their own food in the form of glucose. This process, known as photosynthesis, is an example of which of the following energy conversions?

• Mechanical energy → thermal energy

• Radiant energy → chemical energy

• Chemical energy → mechanical energy

• Sound energy → radiant energy

During digestion, chemical energy is transformed into useable forms of energy, including -

• electrical energy.

• light energy.

• radiant energy.

• mechanical energy.

In organisms, some chemical energy from food will be transformed into -

• thermal energy.

• electrical energy.

• sound energy.

• solar energy.

Where does photosynthesis occur?

• Stem

• Roots

• Leaves

• Flower

The function of the stomata is to -

• allow the exchange of gases carbon dioxide and oxygen.

• allow the exchange of water and nutrients.

• bring water and nutrients from the roots to the leaves.

• bring glucose from the leaves to the rest of the plant.

What is the purpose of the glucose a plant makes during photosynthesis?

• Use as bait to attract pollinators

• Use as energy to grow and other cellular processes

• Use as thermal energy for starch

• use as biofuel for cars

True or False: Chemical energy is not a product of photosynthesis.

• True

• False