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Worksheets7th gr. CSA 5
Total questions: 9
Worksheet time: 7mins
During photosynthesis, energy from the Sun interacts with matter on Earth. Plants, algae (including phytoplankton), and many microorganisms require light to live. Most plants will die if they do not receive adequate light. Light is a form of energy that most plants take in and use to carry out photosynthesis. Photosynthesis is a series of chemical reactions that produces glucose, a sugar compound plants use as food. In this way, plants use light from the Sun to make their own food. Radiant energy from the Sun is changed to chemical energy in glucose molecules.
Which of the following best summarizes photosynthesis?
A process by which plants produce sugar using the energy of sunlight.
An exchange of gases between animals and plants.
An exchange of gases between animals and plants.
A chemical reaction involving nitrogen and other atmospheric gases.
Which best explains what happens to the carbon atoms in carbon dioxide during photosynthesis?
They are transformed into oxygen atoms.
They are incorporated into molecules of glucose.
They are broken down into subatomic particles.
They are destroyed to release energy.
Which statement best describes one step in the process of photosynthesis?
Chloroplasts absorb solar energy.
Chloroplasts release energy by breaking down food molecules.
Mitochondria transform solar energy into sugar.
Mitochondria release oxygen.
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?
When the container included a plant exposed to light, carbon dioxide concentration decreased 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 increased from 800 to 1,000 ppm the temperature in the container went up.
Plants in the container kept in darkness did not lower the concentration of carbon dioxide below 800 ppm.
Which of the following best describes the difference in how plants and humans obtain food?
Plants create their own food, and humans must get it from an outside source.
Plants and humans must get their food from outside sources.
Humans create their own food, and plants must get it from an outside source.
Plants and humans can both create their own food internally.
In which of the following cells does the process of cellular respiration occur?
Both plant cells and animal cells.
Animal cells only.
Neither plant cell nor animal cells.
Plant cells only.
Plants and animals exchange materials through the process of photosynthesis and respiration.
Which of these statements are true about the way these two processes are related?
The products of photosynthesis inhibit respiration.
The products of photosynthesis are the reactants of cellular respiration.
The reactants of photosynthesis are also reactants of cellular respiration.
The products of photosynthesis are also products of cellular respiration.
You want to study how animals depend on plants for survival in aquatic ecosystems. You set up your tank with Elodea densa and a light attached to the edge. You now know that the Elodea will use the light to create sugar as fuel, and they will also release air bubbles into the water.
You then add four goldfish to the tank. Goldfish are omnivorous. In a tank with many Elodea and few goldfish, these animals grow and thrive.
Based on the above information and what you have learned, select the best answer to explain why the goldfish depend on Elodea for their survival in the tank.
The sunlight provides both the Elodea and the goldfish with energy for growth and survival.
The Elodea provides the goldfish with food matter and carbon dioxide.
The goldfish take in the oxygen released as air bubbles and consume Elodea plant matter as food.
The water provides the oxygen the Elodea need to do photosynthesis, which generates food for the fish.
Scientists are trying to build a base on a newly found planet. In order to function property on this new planet, scientist must make sure the proper ingredients are available for cellular respiration to take place.
1. Grass is planted in the base to produce oxygen.
2. Ice from the plant's surface is melted to produce water.
3. Sugar is grown from plants in special tanks.
4. Animals are kept in pens to produce abundant carbon dioxide.
Which of the following of these would best fulfill the requirements for cellular respiration to occur?
2 and 4
2 and 3
1 and 3
3 and 4
